Interesting virtual instrument and help-out for guitar player is now free so why not give a twirl?

Google Play:
https://play.google.com/store/apps/details?id=com.pedrocorp.android.guitar

Robotic Guitarist is both a guitar emulator and music toolbox for guitar players and musicians in general and a fun and enjoyable musical playground for everyone. Even if you don't know a word about music or can't play the guitar! Just play and it will sound good!



★ Amazing guitar emulator

Choose a chord without having to learn finger positions and just hit the strings. You'll enjoy realistic visual effects and high fidelity sound. You can strum, play arpeggios or any other desired technique. You can play licks as well.

★ The guitar lab (never-ending possibilities)

Have you ever wondered how a reverb-enabled, fuzz-distorted bell would sound?

♪ Lots of different sounds
Pick among a large categorized set of sounds including a number of kinds of guitars and playing modes and the sounds of all sorts of musical instruments. Make the guitar sound as a flute or a piano! Funny and exotic sounds are included too, like those from animals. Or even pick a different one for each string! What about creating a band with a human chorus for the lows and a violin for the highs?

♪ Easy-to-use effects
Create a nice atmosphere and add deepness with impressive sound effects like reverb, flanger and echo. Each one features a list of variants so it's plug and play!

♪ Versatile distortion
Would you like a heavier or harsher sound? No problem! Pick a kind of distortion from the several available and set an intensity level. Your electric guitar will be absolutely electrifying!

★ Chord guide

An easy-to-use interface allows you to change your chord selection on the go. You'll see at all times a diagram showing finger positions. Very useful for learners or for those who play already and need to recall a chord.

★ Custom chords and chord presets

You'll be able to take music as far as your imagination takes it because you have the possibility of creating your own chords with a easy-to-use editor. They don't have to be actual guitar chords, but any layout of notes whose sound you like. You'll be able to play those songs with weird hand positions, since you are not limited to standard chords. You can define free strings you can play licks on. This feature allows, for example, to follow a tablature with much more fidelity.

Furthermore, you'll be able to save the chord set you have been composing so you can recover it later, with no need of defining it again chord by chord. That way you'll have at hand every chords needed for each song or experiment.

★ Reliable guitar tuner

If you play a non-virtual guitar, ‮‪‮‪‮‪‮‪Robotic Guitarist is your loyal electronic pocket tuner. It's able to detect frequencies with high accuracy.

★ Handy digital metronome

It has settings for tempo (BPM) and different time signatures. Keep the rythm!

I liked this one and it worked for better or worse in its own peculiar way with a more automatic sequencing of notes which had to be recorded in pattern presets or made beforehand.
This leads to a different results that may not have come up otherwise.
In either case now it is possible to sequence notes as in most other apps if desired.
(I do recommend to fuck around with the recording of pre programmed sequences though and see what happens). It is also possible to load your own drum samples as well to and that is always a good thing.
There is three synthesizers built into the app and they all come with a decent amount of controls. The drums are sampled but you can tune them and do some other changes to them.

Here is the Google Play info:

WHAT'S NEW- improved track saving
- note editing
- mixer
- accessible storage directory, manage saves, exports and drumsamples
- MIDI over USB (requires Android 6.0)

Beatonal is a virtual groovebox and music maker app, enabling you to easily create and share your musical ideas using the built-in synthesizer and drum machine.
Create loops using the eight customizable rhythmic drumpads, and effortlessly sketch chord progressions and melodies with the pattern-based rhythmic keyboards.

This app is free to try, but requires an in-app purchase to unlock all advanced features and project saving.

other features include:
- 4 audio channels: drum machine, base, chords and lead
- Input is automatically fixed to a user selectable scale
- Minimal audio latency
- Contains demo tracks to get you started
- Analog synth with two oscillators, FM, AM and pitch modulation, lowpass filter, and various effects
- Contains 60 built-in synth presets, but you can also create and store your own presets
- Store tracks on your device
- User friendly track sharing through track-url's
- Export track as MIDI so you can continue your work inside other apps or a DAW
- Export track as wav
- Small app size, runs on virtually all android devices (Android 2.3 and higher)
- Send MIDI over USB so you can play live music on your pc with low latency (requires Android 6.0)
- Import your own drumsamples

Time for another great update.
The biggest thing is that it now comes with Ableton Link.
Gabber heads will be happy too as the bpm now can reach 999!

Google Play info:

​WHAT'S NEW
Integrated Ableton Link for beat, phase and tempo synchronization over a wireless LAN (long press PLAY, then 'Enable Ableton Link')
New FX type: Stereo Tool
New Bypass switch for the Parametric EQs
Improved VA-Beast Unison
Increased the tempo range to 20..999bpm
Reduced the memory usage of the FX Units
Improved Latency Compensation
The OpenSL Audio System is no longer experimental
Many minor bug fixes and improvements
Full release notes at http://www.planet-h.com/g-stomper-studio/gst-whats-new/

After the new update there is a new preset bank to buy as in-app purchase. It sounds like this:

Here is also a video showcasing possibilities when it comes to the new functions. 

"There is polyphonic aftertouch now! wich means, every played note get its own filtercurve, pitch or whatever you select via aftertouch! i use a cme xkey air to benefit from the synths possibillity. in this video i show some userpatches i created in the last 4 months. some i.e. at 3:00 demonstrating polyphonic aftertouch rather well! you hear only the synth with its internal fx! have fun!"

The G-Stomper family is marching forward. I am excited to test the new pitch and stretch effects over the long bus ride I will take in about half an hour.

Google play info:

G-Stomper Studio

WHAT'S NEW

​Added independent control of Pitch & Speed to the Drum Samplers
Added Pitch Shift & Time Compress/Expand to the Audio Editor processing
Replaced the existing Pitch Shifter FX with two new, completely re-written Pitch Shifters
Added a Moog 24dB HP Filter to the FX types
Renamed X-Delay to LFO X-Delay for better transparency
New re-designed FX Selector (organized by FX category)
Various improvements & minor bug fixes
Full release notes at http://www.planet-h.com/g-stomper-studio/gst-whats-new/

So this charming and easy to use sequencer/sample application is updated and the biggest thing is that now you can export compositions as XM files meaning that they can now be imported into a lot of trackers, as for example SunVox (The same app from the same developer. sneaky, sneaky  bastard) and as mentioned by Robin contributor to this website it is a a very nice way to get them into SunVox.
In the sense of SunVox being to difficult to use sequencing wise but now you can use all the modular effects available in SunVox. Or just being to be able to bang out tunes in a more managable way and continue later in another tracker.
Anyway it is great and we should support single developers of apps like this and apps like G-Stomper. Caustic and for example free apps like VU-Knob! (and many more).
Also remember that Mr Nightradio's apps are for free for the PC/Mac/Linux computers!

Google Play info:

* export to XM (eXtended Module of the FastTracker2) - this file can be loaded by any modern music tracker/player (for example, SunVox);
* sound editor: "reduce size / 2 (lossy)" function has been added;
* Android (4.0 and higher): System Settings -> Interface: new option "Hide system bars" for true fullscreen mode;
* new sound packs: pack10_fm, pack11_percussion_2, pack12_orchestra;
* new song - Example12;
* bugs fixed.

​WHAT'S NEW
​• Added Mono option to the mix-down dialog
• Added 'Set punch in' and 'Set punch out' options to the markers menu
• Added 'Drum pads' to the MIDI input selection dialog to use drum pads for soundfonts from other vendors
• Added 'Remove' button to the top bar for effects with custom graphics
• Added MIDI channel filter option to the MIDI input selection dialog
• Paste using the paste button now pastes at the time marker
• Much more, see the release notes in the app!

It is here.
So much new really cool features that even half of it would be fantastic.

​There is a couple of things that is really cool that sticks out-

The audio editor have two different types of time-stretch/pitch shifter.

A new Synthesizer that have been used by many Beta testers with great results.

But to me maybe the coolest thing is the possibility to merge all sound generators into a PCM (the capable sampler) preset. Think about that!
That means you can make the most complex synthesizer patches as there is so many different types of sound engines to use inside of Caustic. It even comes with a little mixer before merging it down into a new preset! Plus that it frees up a lot of CPU if the device is suffering.

I would say that Android is blessed by having such a capable app that would be more than enough if it was the only one. Maybe the only thing missing to make it complete would be full on audio tracks but there is workarounds for that as well using the sampler.

Remember that there is a free PC version as well with no limitations!

Lately I have heard some amazing productions using Caustic in styles of Dubstep and Trap music and find it fascinating that there seems to be a new generation of Caustians that are taking Caustic to a new level. Will be posting some of this soon.

So it took some time, but that is all in the past now and the developer have always been generous enough to let the Beta version grace free, so for the interested the wait have not been to burdensome.
Now we are waiting for the mastering app that the developer is working on but it seems pretty ready and have a feeling that the wait will not be as long.

Take a look at these videos that are as other Caustic videos made by the developer some of the best tutorials I have seen. Actually would say that even if not using Caustic they are great at explaining concepts for similar synthesizers and effects etc. using other apps or hardware.

To get the free PC version and to take a look at the forum as well for more information and general goodwill go here:
http://www.singlecellsoftware.com/

Google Play update information:

https://play.google.com/store/apps/details?id=com.singlecellsoftware.caustic

New machine: SawSynth (Polyphonic supersaw-type synth)
New "melody helper" to lock keyboards to scales
Support for more time signatures (3/4, 4/4, 5/4, 6/4, 7/4) from the song page and in pattern editors.
Tool to create new PCMSynth instruments by merging your rack.
Keyable BPM.
4 New effects
Stereo support for PCMSynth, Beatbox and Modular machine input
Wave Editor now supports stereo, pitchshift/timestretch, bpm detection and more.
New loop and stem export options

Have a feeling that this Groovebox app will grow into something interesting as it already have some fresh ideas built into it.

The Update:

- improved playback
- added swing
- added chord-arp

https://play.google.com/store/apps/details?id=nl.drievier.beatonal

So as always I thought G-Stomper Studio / VA-Beast / Rhythm was pretty great before and have a hard time to imagine what more can be added but as always there is more things to add that actually makes a big difference.

Here is the list of what is new for G-Stomper Studio but a lot of it applies to VA-Beast and Rhythm as well:

G-Stomper Studio 5.3.0.1 Release Notes:

• New Audio Session Recorder to record your live sessions as .wav while tweaking the machines (long press RECORD to start, long press STOP to stop)
• New LOCK MONO switch on the Mixer, FX and Master view to be able to temporary work on the mix in mono (bypasses all pannings and Stereo affecting FX parts)
• New setting in the MIDI setup to transpose incoming MIDI Notes by -6..+6 semitones
• New MIDI IN/OUT indicator at the left side of the play/stop/record block (only visible if midi transmissions occur)
• New Multi-Mute switch on the Mixer view (as known from FX + Master)
• New BPM indicator on the play button
• Extended the Drum Sampler Roll feature to 5x, 6x, 7x, 8x (very special thanks to Christof for the input)
• New ‘Auto-Rearrange Sequence’ feature when changing the Time Signature (select the new Time Signature with long press)
• Improved MIDI OUT timing stability
• Various bugfixes in the MIDI handling
• Fixed a bug in the G-Stomper Rhythm/VA-Beast Pattern Importer
• Bugfix: The Note Grid bar dependent octave pre-selection now works as expected
• Bugfix: Fader tooltips now show the correct value when step editing an automation sequence while the sequencer is running (very special thanks to Peter for the bug report)
• Many minor UI bugfixes
• Updated User Manual

Google Play:
G-Stomper Studio

Not a big update but thought that it is mentioning Heat Synthesizer for readers that may have missed it as it is one of the more complex and complete synthesizer for Android and the first advanced one that came. There is a demo to try.

Google Play:
Heat Synthesizer

WHAT'S NEW

​* Fixed connection issue
* Added new comb filter type
Comb filter supports both positive & negative feedback by adjusting the resonance parameter of the filter. A centered knob means no feedback.

A lot of new goodness!

What is new:

• Windows (7 and higher): multitouch support;
• Linux (x86_64 only): multitouch support;
• Linux: arm64 architecture support (tested on PINE64 64-bit Single Board Computer);
• Linux: screen rotation support;
• new module Pitch2Ctl: converts the incoming notes to the controller values (in some another connected module);
• new module Velocity2Ctl: converts the velocity parameter of the incoming notes to the controller values (in some another connected module);
• new project parameter - "Time grid" (number of lines per grid cell);
• add option "nowin" to the sunvox_config.ini if you want to launch SunVox without the window (pure console mode without UI);
• Main SunVox Menu: new function "Merge project" (load project over the current);
• Timeline: target pointer (like in the Module View) has been added; use it to choose where to place the new pattern(s);
• Timeline: now the file is used for the pattern copy-buffer; so you can paste even after the SunVox restart;
• Analog Generator: new options "Retain phase" (don't reset the phase) and "Random phase";
• Analog Generator: new options "Filter frequency = note frequency" and "Velocity-dependent filter resonance"; see the analog_gen4 and analog_gen5 examples;
• Analog Generator: new waveform "Drawn with spline interpolation";
• MultiSynth: new button "Set" (set exact values of the curve);
• Vibrato: new controller "Exponential amplitude";
• Kicker: sine waveform has been added;
• LFO: random (noise) waveform has been added;
• Loop: new controller "Mode" (normal/ping-pong loop playback); see the loop2 example;
• MetaModule: optimized interface + default user controller names;
• Sampler: new option "Stop recording on project stop";
• MultiCtl: new controller "OUT offset";
• frequency/delay limits (only for ms and Hz units) has been increased in the following modules: Echo, Delay, Vibrato, LFO;
• improved MIDI Import and Export: channel/program/bank/controller support; new timing algorithm;
• ability to switch between the text fields using the TAB/SHIFT+TAB keys;
• new oscilloscope mode (module visualizer) - XY (X = left channel; Y = right channel);
• now all notes are visible on the musical keyboard: expand it up to see the full range;
• Modules (routing): new function "Find" (find a module by name);
• Pattern Editor: improved hints;
• Pattern Editor: click on some event (note or some other command) and the corresponding module will be highlighted;
• Pattern Properties: new buttons "Shrink /2" and "Expand *2" has been added;
• Preferences -> Main: new option "Make project backup before the first overwrite";
• Preferences -> Timeline: new option "Show line numbers from ...";
• Preferences -> Timeline: new option "Grid cell size";
• Preferences -> Interface: new option "Double click time" (in ms);
• Preferences -> Interface -> Scale: new parameter "Font scale";
• new keyboard shortcut: CTRL + 1 - toggle mute (module);
• new keyboard shortcut: CTRL + 2 - toggle solo (module);
• new keyboard shortcut: CTRL + 3 - toggle bypass (module);
• new keyboard shortcut: CTRL + 4 - unmute all modules;
• new keyboard shortcut: CTRL + F - find a module;
• sunvox_no_simd for Linux x86 has been temporarily removed; use sunvox_lofi instead;
• new instruments and effects;
• new simple project examples: analog_gen4, analog_gen5, dubstep, loop2, pitch2ctl ***;
• new song examples: Quantum Countdown, PalmSounds10, Kiberaver - Hard Motor;
• bugs fixed.

This is the programming language that is used for many of Nightradio's apps (The creator of SunVox) and is specialized for making audio and visualization type of programs apps.
Also available directly on your device for coding and playing back the coded creations.
Some examples are included that can be used.

So it is now updated which means that hopefully Virtual ANS will be updated to soon!
As they go hand in hand and have noticed that it normally gets updated as Pixilang expands and brings the expansion into Nightradio's other apps.

Here is what is new:

• new documentation: http://www.warmplace.ru/wiki/pixilang:manual_en;
• multitouch support has been added to the Linux and Windows (7 and higher) versions;
• Raspberry Pi support (OpenGL ES 2.0, no mouse cursor);
• Linux arm64 support (tested on PINE64 64-bit Single Board Computer) (SDL-based, no OpenGL);
• additional parameter (optional) tnum (number of triangles) has been added to triangles3d() and sort_triangles3d();
• new built-in global variable UI_FONT_SCALE - use it to scale the text in your UI; variables like this can be changed by user in the system settings of Pixilang;
• new built-in container LANG_NAME with the name of current system language (in POSIX format [language][_TERRITORY][.CODESET][@modifier]); examples: en_US, ru_RU.utf8;
• new functions: set_pixel_size(), get_pixel_size(); use it to change the size of the screen pixels;
• optimization of the following functions: wavetable_generator(), apply_filter();
• Pixilang is now optimized for OpenGL ES 2.0;
• new OpenGL functions (working with shaders): gl_new_prog(), gl_use_prog(), gl_uniform(), gl_uniform_matrix();
• new OpenGL constants (default shader names) for the gl_new_prog(): GL_SHADER_SOLID, GL_SHADER_GRAD, GL_SHADER_TEX_ALPHA_SOLID, GL_SHADER_TEX_ALPHA_GRAD, GL_SHADER_TEX_RGB_SOLID, GL_SHADER_TEX_RGB_GRAD;
• new flag for the copy(): COPY_CLIPPING;
• ability to import the loop points from WAV file; the following container properties will be created: loop_start, loop_len, loop_type (1-normal,2-ping-pong);
• INT8 mode has been removed from wavetable_generator();
• maximum number of containers can be defined by the pixi_containers_num parameter in the pixilang_config.ini file;
• revised examples;
• new graphics examples: primitives, multitouch, coordinates, demo01;
• new OpenGL examples: shaders, shaders2, shaders3;
• new libraries (lib directory): gfx_primitives;
• bugs fixed.

To get it go here:

http://warmplace.ru/soft/pixilang/

So it came after a long wait and they did not charge it as a separate application either!
Have not had full time on this yet but it looks real good and there is now an application that straddles synthesizer sequencing with audio tracks and recording (The one exception being Soundcamp that is only available on certain Samsung devices). The direct recording will of course suffer if the device have high latency and it is not possible as in Audio Evolution and
n-Track Studio to use external soundcard for recording. But if is still fine that it is possible even if the recordings have to be nudged a bit.

​Coming with the mini synth which is a capable synthesizer and the possibility to demo and get two more as in-app purchase. They did not cost too much one for around 1.50 and one for 2.50 or so. Then there is as in the older version the sample instruments. Everything is laid out nicely and think workflow wise it is easy. This version can also have separate FX for each track and it seems that there can be a bunch of them. 
There is a demo version and for people upgrading there is the possibility to downgrade if the device can not take the new version or you simply do not like it.
​If it works good I do not see why you would prefer the old version as this have much more options and the sequencer is so much easier to work with etc...

It is recommended to use at least Android 4.1 even if it is possible to install it on devices down to Android 2.3.3. Maybe one complaint would be is that the download is like around 700mb and it would be good to have alternative download for a smaller version with less sample instruments?
If using FL Studio as a DAW on PC it seems that this would a "must" as there is a possibility to load as a VSTi inside the DAW. It would have been cool if they released it as VSTi for other Daws as well.
So as said have not had time to dig deeper but so far thumbs up.

Google Play info:

FL Studio Mobile allows you to create and save complete multi-track music projects on your Android phone or tablet device. You can even load the FL Studio Mobile projects into the 'FL Studio Desktop PC' version and take them to the next level.If it’s a beat on the step sequencer, a melody on the piano roll or a full song on the playlist, FL Studio Mobile has you covered. Never lose that idea again. Get it down and happening wherever you are.

​FEATURES

• High quality instruments, drum kits & sliced-loop beats
• Step sequencer for fast percussion programming and sliced-loop reworking
• Configurable virtual piano-keyboard
• Drum pads: Configurable 
• Audio tracks: audio recording (with monitoring), wav import
• Wave editor: 
• Browser with preview button and logical sorting into Instruments, Synths, Drum kits & Loops
• Pan, volume, release and attack time configurable per instrument
• High quality, battery-friendly audio engine (latency depends on the device)
• Drum loops and sliced loops ready to start your project with a cool beat
• Effects include Limiter, Compressor, Reverb, Delay, EQ, Distortion, Filter and more to enhance your mix
• Multi-track sequencer and intuitive editing options
• Per-track mute, solo, effect bus, pan and volume adjustment
• Edit at the level of tracks, bars or down to individual notes
• Piano roll editor for manual entry of note & chord sequence data or detailed editing of recorded performances 
• Undo for all editable screens
• Metronome with tempo settings
• Intuitive positioning of screens with the slide gesture and resize with the pinch gesture
• Save and load your songs, export to WAV and AAC
• Share your songs via Sync to other Mobile 3 devices
• In-app user manual
• Android 4.1 or later required
• Configurable to work with all screen resolutions and sizes.
MANUAL / SUPPORT / VIDEOS
http://support.image-line.com/redirect/flstudiomobile_help
TROUBLE-SHOOTING INSTALLATION ISSUES
Please visit this link for step-by-step troubleshooting options
http://support.image-line.com/redirect/flmobile_android_troubleshooting
NOTE: A custom ROM, a rooted Android OS (with privileged apps installed) and antivirus software can cause significant performance issues.
* "FL Studio" desktop PC version (sold separately) is installed, on average, over 30,000 times each DAY making it one of the world's most popular and exciting music production systems. Everything you need in one package to compose, arrange, record, edit, mix and master professional quality music, the perfect studio partner for FL Studio Mobile. You can download the demo version of the FL Studio Desktop PC version and enhance your FL Studio Mobile projects for free then save to audio format.

It is only a Beta for Windows, Linux (x68, x68_64, arm, arm64), OSX and Windows Mobile.
http://warmplace.ru/forum/viewtopic.php?f=16&t=4171&p=14374#p14374​
Was wondering when there was going to be a new SunVox update lately and here it is!
There is a lot of new things a s usual and a lot of them will not be exciting until put to good use.
Here is one of the new things that mentally I can not see how it would be useful but probably will be surprised when putting it into action!

• new module Pitch2Ctl: converts the incoming notes to the controller values (in some another connected module);
  

One cool thing that Mr Nightradio already used in his Palmsounds birthday video is  the new viualising mode.

​What is in this Beta:

 v1.9.2 BETA1 (10 oct 2016):

• Windows (7 and higher): multitouch support;
• Linux (x86_64 only): multitouch support;
• Linux: arm64 architecture support (tested on PINE64 64-bit Single Board Computer);
• Linux: screen rotation support;
• new module Pitch2Ctl: converts the incoming notes to the controller values (in some another connected module);
• new project parameter - "Time grid" (number of lines per grid cell);
• add option "nowin" to the sunvox_config.ini if you want to launch SunVox without the window (pure console mode without UI);
• Main SunVox Menu: new function "Merge project" (load project over the current);
• Timeline: target pointer (like in the Module View) has been added; use it to choose where to place the new pattern(s);
• Timeline: now the file is used for the pattern copy-buffer; so you can paste even after the SunVox restart;
• Analog Generator: new options "Retain phase" (don't reset the phase) and "Random phase";
• Analog Generator: new options "Filter frequency = note frequency" and "Velocity-dependent filter resonance"; see the analog_gen4 and analog_gen5 examples;
• MultiSynth: new button "Set" (set exact values of the curve);
• Vibrato: new controller "Exponential amplitude";
• Kicker: sine waveform has been added;
• LFO: random (noise) waveform has been added;
• Loop: new controller "Mode" (normal/ping-pong loop playback); see the loop2 example;
• MetaModule: optimized interface + default user controller names;
• improved MIDI Import and Export: channel/program/bank/controller support; new timing algorithm;
• ability to switch between the text fields using the TAB/SHIFT+TAB keys;
• new oscilloscope mode (module visualizer) - XY (X = left channel; Y = right channel);
• now all notes are visible on the musical keyboard: expand it up to see the full range;
• Module View (Routing): new function "Find" (find a module by name);
• Pattern Editor: improved hints;
• Pattern Editor: click on some event (note or some other command) and the corresponding module will be highlighted;
• Pattern Properties: new buttons "Shrink /2" and "Expand *2" has been added;
• Preferences -> Main: new option "Make project backup before the first overwrite";
• Preferences -> Timeline: new option "Show line numbers from ...";
• Preferences -> Timeline: new option "Grid cell size";
• Preferences -> Interface: new option "Double click time" (in ms);
• Preferences -> Interface -> Scale: new parameter "Font scale";
• new keyboard shortcut: CTRL + 1 - toggle mute (module);
• new keyboard shortcut: CTRL + 2 - toggle solo (module);
• new keyboard shortcut: CTRL + 3 - toggle bypass (module);
• new keyboard shortcut: CTRL + F - find a module;
• new instruments and effects;
• new simple project examples: analog_gen4, analog_gen5, dubstep, loop2, pitch2ctl ***;
• new song examples: Quantum Countdown, PalmSounds10;
• bugs fixed.

From the G-Stomper website:

This new release brings Android M MIDI support to devices running on Android 6.0 and higher, including…

• USB Host (Android 3.1+): Connect USB MIDI equipment to G-Stomper
• BLE Host (Android 6.0+): Connect Bluetooth LE MIDI equipment to G-Stomper
• USB Peripheral (Android 6.0+): Connect G-Stomper as USB MIDI Peripheral/Extender to your host sequencer (PC, MAC, another Android/G-Stomper device, etc.)
• Experimental support for multiple concurrent MIDI Devices (Android 3.1+)

If looking for something that is pretty complete Stagelight could be cool. The basic version is for free and then buy in-app upgrades like more effects and sound machines etc.
It also includes audio tracks which is of course a big bonus.
There is also a PC version that can load VST's and in effect is a DAW for not too much money.
So they recently updated and that included:

New Look and Feel
-Enhanced color scheme
-New Transport design allows you to keep more in view
-Redesigned Track Mixer with collapsible panels
New Mixing Features
-Full-screen Mixer View
-Master Track view with global view switches
-New: Send Effect Tracks
-much more..
Track Freeze
-Freeze instruments and insert effects to save CPU and RAM
SongTransfer
-Send Song Projects to your other connected devices with the push of a button
Numerous additional enhancements