The contest is based on one song that people can remix or rap over. The prices are okay and as always it will give some attention which never hurt.

To read more:
http://songtr.ee/contest/Rap-Battle

It ends the 15th of December.

​To read more about it:
http://songtr.ee/contest

Interesting concept.
So people looking for music can post a request and a price for musicians to make music.
It will be interesting to see how this will turn out.

Information from the website:

A new experiment is starting today!

People searching for music for their videos, games or any other commercial use can now post a request for music through the new Custom Music area . 

The person that starts the project can specify a project brief - describing the kind of custom-made music they need, a deadline and a budget, and the request will be posted on Songtree. 

Musicians are challenged to take part; we hope this could be a nice thing for the community to get rewarded for what they are recording on Songtree.

We've decided for the time being to divide equally the revenue between the people who contributed to the song that gets picked by the project owner while Songtree commission on the song budget will be 15%.

Read all the rules of the contest and please let us know if you have comments and suggestions!

To hear some of the music people have collaborated on together using Songtree in Deccember go here:
http://songtr.ee/highlights.php

I do hope they do more of these contests. Not only is there real prices to win but it is also a way to get the attention of a already established artist.

To read what the SongTree team has to say about the result go here:
http://songtr.ee/song/5925/Songtree-Blog/T.O.N.E-z-overdub-contest:-we-have-a-winner!

The contest is to overdub one track by T.O.N.E-z. called Let Go. And this could be to overdub what is already overdubbed.
Some nice Audio interfaces and licenses for the n-Track Studio DAW as prices.
If this sounds interesting go here to read more about it-
http://songtr.ee/recording-contest.php

A great new application for making music together and because it is for direct recording into the application it gives that a lot of people are using it for live recorded instruments. 
There is the possibilities to upload pre-recorded tracks as well so it could be a very nice app to have for people in for example the Caustic community to make tracks together.
Or you are a lonely musician having recorded a acoustic guitar track and get some more instrumentation in there. I think that Songtree will lead musicians to find each other all over the world that they like and can continue to work with. Plus that there will be musical surprises in regards to how people treats the source material.
Can also see how it can be used to find new material to jam to and as it is easy to hit record you will have contributed to someones music.

It is for free and think that it is generous of n-Track to support this and to host all the tracks.
I guess they do it for the publicity of the DAW that they sell but it is a very nice publicity.
The DAW is not expensive and the workflow seems pretty nice (Have not tried it on PC). There is a stripped down version for Android that can export projects into the Windows/MAC version.
Songtree will also be integrated in their next version n-Track Studio that is supposed to come out soon and buying Version seven will get you number eight for free.

Have mentioned Songtree sometimes during the Beta testing and will for sure continue to mention Songtree many more times as they do compilations of the best collaborations every month and this is one of the great things that happened in mobile music making 2015. Simple idea but have not really been done before in this way with live recorded music. Plus being very well executed.
It makes me excited to involve myself musically into some of the trees as soon as time permits!

To go the website:
http://songtr.ee/welcome.php

Play Store info:
Songtree is a FREE collaborative recording app that allows you to create songs, edit, add effects and post them to the Songtree online community."Best new app for musicians" for Synthopia, Discchord, MusicRadar, Fact Magazine, Hispasonic, UnoCero, PalmSounds and Aux.tv
User reviews: "What a wonderful way to collaborate creatively!"
The app includes everything you need to make music - no other recording software is required.
The app features:
• Built-in metronome
• High quality audio effects including Echo, Reverb, Compression, Phaser, Chorus/Flanger, Tube Amp
• Cut, copy and paste tracks, add fades, loop parts
• Record using your device built-in mic or external adapter
Use Songtree Recorder to create songs with other musicians:
• Start a recording session that others can join, or
• Contribute to other people’s songs: download a track another user has posted and use it as base track, jam on it and post the result back online. As new tracks are posted a ‘tree’ of songs gradually grows, with each branch a new track added to the song
• Share your work to Facebook and Twitter or invite other music creators to join your recording
• If you find a talented musician or singer, give them a like or a comment and join them with your instrument
If you have problems, comments or suggestions please contact us at feedback@songtr.ee
Your feedback is helping us to improve the app.
Coming soon:
* More ways to import/export tracks