If you did not check it out yet you should as it is one of the more complete applications for music making out there, and it has not reached full release yet (still in a very functional BETA).
It is costing no more than a cup of coffee...so try it out as a demo or just buy the app directly.
Update information:
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Add Flanger effect
Add Chorus effect
Add Comb filter effect
Add Tremolo effect
Import effects when creating loop with loop source
Copy BYPASS state when copying effects and conserve state when changing effect type
Limit range when randomizing step pitches
Display LOOP STEPS dialog when song element long-tapped
. . .
For details, visit www.syntheogen.com/support_changes.html
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Playstore link:
Syntheogen