I don't have any DAW related software apps on my Android, but wondered what are some useful or interesting/creative apps you guys use and can recommend?
 

Google "Best (free) android DAW apps" or variations and there are quite a few things out there.
 
I have been researching this recently as well since upgrading my phone. I tried Caustic in the past, but didn't click with it, so downloaded "Walk Band" which is lauded as the counterpart to "GarageBand." Not done a lot with it yet, but it is free and has free instrument modules available. I can see capturing tracks with it, but anything editing/mixing related would be rough. On a phone, anything "DAW" gets clunky just from the tiny screen space (fat finger syndrome). This phone (LG V30) came with "HD Audio Recorder" (also free), which I have used more since most ideas can be captured vocally and that will do vocal tracks and vocal overdubbing (not tested that yet). Basically one-track, but good for capturing things on the fly (also an advantage of a phone over a tablet).
 
Unfortunately, the iOS market seems to have precedence on anything music-related. I have made a few purchases in the past year with free iOS support and zero support from Android... in some ways this does make sense since they are tactile apps and best suited for iPad... even on an iPhone I can see some of them being rather clunky (again, the screen space).
 
I can see "forced to buy an iPad" somewhere in my future

IK has a bunch of OK stuff for android. I searched for "music recorder" in the app store and came across n-Track Studio 8, Audio Evolution Mobile Studio and Walk Band. I'm sure there are others if I knew where to look.

This is an older link. The code has gone a long way since. Just in case you want a class compliant interface for the Android. Android Gets USB Audio

I have:
 
For recording:
 
Audio Evolution Mobile with paid USB support (my door stop PreSonus AudioBox 44VSL works great as a class compliant device...way better than it ever did on Windows)
 
Field Recorder (v7.1 fixed the CPU spiking problem)
 
For synthing around:
 
G-Stomper Studio
 
ModSynth
 
Saucillator for Android
 
For beats to practice to:
 
Pro Metronome (by EUMLab)
 
Drumgenius
 
Loopz
 
Grooves Arranger
 
Others:
 
PitchLab Pro
 
Chord Wheel (by Elex)
 
Songsterr
 
Producer Tools
 
Note that I hate apps that serve ads. If I can't purchase an ad-free version, I don't even demo an app.

Wow John.....you've got yourself a portable DAW right there.
 
Good suggestions all, I'll definitely be checking them out.

TouchOSC/TouchDAW are really the only two I use.
 
Android still has issues with audio apps that Google is trying to hash out. Not sure how long it will take to make it up to par with Apple but until it does, I doubt we'll see many high quality apps for the platform

Stuff that's still on my phone (hope the links work as I entered them on my PC - might need to remove the &hl=en_GB if you aren't in the UK)... The only thing that's DAW like is the first one.
 
Audio Evolution Mobile was pretty good for an Android DAW - https://play.google.com/store/apps/details?id=com.extreamsd.aemobiledemo 
 
EasyBand - like a very cut down Band in a Box https://play.google.com/store/apps/details?id=com.nw.easybanddemo&hl=en_GB 
 
Apps for looking up Tabs:-
 - GuitarTapp Pro - Lite is here https://play.google.com/store/apps/details?id=com.by845tools.guitartapp.trial&hl=en_GB 
- Ultimate tabs Pro - lite here https://play.google.com/store/apps/details?id=com.ultimateguitar.tabs&hl=en_GB 
 
- GuitarTuna - https://play.google.com/store/apps/details?id=com.ovelin.guitartuna&hl=en_GB 
 
- SmartChord - https://play.google.com/store/apps/details?id=de.smartchord.droid 
 
- TouchDAW - https://play.google.com/store/apps/details?id=de.humatic.tdf  You can get a Sonar template here https://www.humatic.de/htools/touchdaw/man_daw.htm#sonar 
 
- Midi Commander - https://play.google.com/store/apps/details?id=it.bordero.midicontroller I used this to set up a way to select presets on my Peavey AT-200 (Autotune guitar) as the in-built system was flakey.
  
- Amplifi remote - only of interest if you have a Line 6 Amplifi amp. https://play.google.com/store/apps/details?id=com.line6.amplifi&hl=en_GB 
 
Probably some others that I've forgotten 

Good stuff there ZT, thanks!! I appreciate all the links as well.

I think if I was going to use a tablet for music, I would probably look around for a deal on iPad.  The audio apps market is really booming for that.
 
I have a 10" Android, but it doesn't see a lot of use, other than for portable misc computing when my Windows laptop is too bulky.
 
But these are some good links to check out.  Thanks!