To get this new manual go here:
​​www.sevenpad-music-app.top/user-guide-7pad-v2/

HumBeatz are the same developers as a the DAW Amped Studio that is an online DAW that can be used Offline as well allowing for VST/i's.
​When writing about HumBeatz my thought was that it could have been a good idea to have an sequencer buillt in to expand on the two beats allowance but guess that this is a good idea as well and being able to use Amped Studio over the net allows for easy integration when having internet access.

Google Play:
https://play.google.com/store/apps/details?id=com.humbeatz.humbeatz

To read more or try out the DAW (There is a free version and a subscription version for around five moneys a month):
​ampedstudio.com/

Lord Gogo have made some deeper incursions into SunVox and it is a good idea to check out his
Youtube channel for more material to inspire and incorporate into your own work.
In this video he is using the image loading function in the SunVox sampler to do interesting things.
Note that the fies are avaiable for download which is muy nice, as just following the video can be hard for a beginner (and people like me that have a hard time in general with anything more than two layers deep...)

​His own explanation:

​SunVox sampler module can load pictures. It recognize grey values of this images. I had the idea to create alternating bands of different grey values and loaded this pictures in the sampler. You can create custom LFO shapes and step sequencers. Then I use a Sound to Control module to transform the audio output of the sampler into datas I route to any parameter I want. In this case I show how to control the pitch and the filter, and restrict the notes in a scale module. I use the sequencer effect 7 (time stretch) to sync the LFO to the project tempo.
Thanks to Mattew R. Scott for giving me the tip of using the sampler module as an LFO.
Get the files, projects and images : https://www.dropbox.com/s/lw95xct4d2w...

KVR Audio one of the biggest sources for information when it comes to music programs and with a very active forum have again arranged for a contest that is open for all platforms.
Have always been interesting to see what developers have done and of course download as all entries are for free!
In either case there is a prices that may not be the highest but there is recognition to be had and it is also a way to flex some creative muscles as it can be any weird ideas that can be developed and shared without worries if it is commercial enough.

P.S- The participation from earlier contests are available for download... not too much or any at all when it comes to Android apps but who knows maybe that wil change this year!

So here is the basic information and link:
https://www.kvraudio.com/kvr-developer-challenge/2018/

Welcome to the KVR Developer Challenge 2018, the seventh free-for-all audio plug-in / audio application / soundware design event!
The "KVR Developer Challenge" is for anyone who develops Audio Plug-ins or Applications and Soundware. The challenge is to create and release a brand new free audio plug-in, application or sound library / pack / set that will benefit the community at large. Creativity is key, it can be as simple or as complex as you want - KVR members will vote on the entries and pick the eventual winner using whatever criteria they choose to.
Five cash prizes will be awarded to the top entries and a wildcard pick. Prize moneys are sponsored by the community-funded KVR Developer Challenge 2018 donation pool. Other exciting sponsored prizes will be announced soon, and additional software prizes to be added will be shared with donators to the competition.
Entries may be submitted through August 30, 2018. All submissions will then be hosted for download on the KVR server and released simultaneously for public appraisal and voting. Voting will close on September 30, 2018, with the winner being announced in October.

So the Nanoloop family have a new member.
Okay so it is not Android but it is a portable and old school and funky, so felt that it had to get mentioned. Plus that an old gameboy can be had for like 10-15 moneys...
Ahh the cartridge is more expensive of course but analogue mojo with three channels for 69 moneys is more or less what other gadgets cost, like pocket operators and the like... Plus have admiration for this single developer to just keep pushing such a niche product as much as he is.

Here are some facts and link:
http://www.nanoloop.com/mono/index.html

Specs

3 channels:

r = Rectangular Wave

• Dual oscillators
  Variable pulse width
  Low-pass filter with adjustable resonance

c = Click

• Single impulses
  Extra-resonant bandpass filter for 808-like drum sounds.

n = Noise

• True analog noise generator or
  Dual square waves
  Bandpass filter with medium resonance

Technology

On the original Game Boy models, one pin of the cartridge connector functions as audio input, connected to the built-in amplifier. This unique feature allows to generate sound on the cart and play it through the headphone output on a completely analog signal path.

In the nanoloop mono cart, the analog components (op-amps, comparators, logic cells etc) of a PIC microcontroller are connected and configured in such a way that they form a hybrid soundchip with 3 analog filters and a true random noise generstor, using only a few passive external components.

Hardware

The cart is a flat but very robust PCB with all electronic parts embedded. 

Software

Nanoloop mono is a stepsequencer with per-step control for all parameters. There are 8 banks of flash memory each of which can hold 15 patterns per channel and a song structure.

Compatibility

DMG (original Game Boy) OK, clean and bassy

Game Boy Pocketworks, but less bass, more hiss, whine

Game Boy Colorworks, but very little / distorted bass, a lot of hum and whine

Game Boy Advancedoesn't work, cart won't even boot

Allthough amplitudes are the same as with internal sound, with nanoloop mono's softer characterisic, differences in audio quality are more noticeable.
Some improvement is possible by adding capacitors to the Game Boy's main board ("bass mod" and "noise filter mod"). However, GB Pocket will still produce a high-pitched whine and GB color will still hum and distort basses.

In conclusion, only the original Dot Matrix Game Boy can be recommended. 
​
Sync

Nanoloop mono offers the same sync options as nanoloop one.

Have had fascination over the idea to create music from just vocals and have tried sometimes using Melodyne. For me it has not been easy as the things that come up using my head instead of an instrument or sequencer have been far less interesting.

In the end maybe having an instrument at hand to just pick out the notes is easier.
Having said that and maybe leaving the impression of negativity over such an app like this…
​I must say that I like it.

First on my mind was will it work, as there are other apps that have been trying their hands on note recognition but failed miserable. As anyone that tried these apps will tell you, that it is hard to use a garbled mess of random midi notes for anything.

Second was, will the app be used and not just occupying real estate on the phone/tablet?
Feel that yes there is definitively use for it. Maybe for me the first use is to quickly take out music that I am listening to without using an instrument and having the midi notes available for later.  Or use the bassline off a song as a starting point etc.

And yes it actually works! It does find the hummed notes with accuracy and there is some heavy algorithms going on behind the scene as it takes some times to transform the audio into midi, but it works.
There is also the problem of latency that they solved by letting the app listen to the metronome and audio recordings and get adjusted.
I mention these concerns as they are the most important to know if anyone is interested in getting the app.

​There is some setting up and trial and error but not too much and my biggest critique is that it only records two bars for each track but understandably it would be too heavy processing and waiting time otherwise. And for doing a bassline/melody/beat it works out fine.

Hopefully they maybe add a sequencer window that can be used for importing the midi and as such make longer tracks possible piece by piece.

Also feel that they should have a free version with maybe just one track and no saving or similar as even if it is not costing a fortune it is good to test it first just to know how well it performs on whatever device. But there is always possible to test it anyway and return it after an hour or two so it is not a big thing.

So it will be fun to see if I end up using this app or not but in either case I am happy that it is installed and having the possibilities that it offers.

P.s the sounds are General Midi but midi can be exported to use in other apps/programs.

Google Play:
https://play.google.com/store/apps/details?id=com.humbeatz.humbeatz

HumBeatz is the revolutionary music making app that allows you 
to hum, whistle or beatbox and turn it into the musical instrument of 
your choice. Now you can quickly create musical parts and song sketches with just your voice!

HumBeatz is a four track loop recorder with two detection modes, Hum and Beatz. The detection mode translates your recordings to notes which are then played back by the included instruments or drum kits. You can also skip detection and use it as a simple loop recorder.

Hum detection allows you to quickly turn your whistling or humming into one of the over 30 virtual instrument included. Get your ideas out fast and easily anywhere!

Beatz detection translates your beatbox to any of the included drum 
kits! Using our machine learning algorithms you can also teach HumBeatz what types of sounds to use for your beatboxing.

Included with HumBeatz are a variety of drum kits and instruments, two effects (Reverb and Delay), a four-track Mix page and a Teach page.

HumBeatz is an excellent tool for any musician on the go and opens up music creation to everyone.