Using Paid for Add-ons with Other Apps

[Keytar Paul]

Is there any way to utilise your Android midi and Audio I/O apps with other Android apps to improve their capabilities  - 

Specifically - Caustic for Android

Their Instruments with Midi CC LEARN  are just amazing but their Midi Live Play latency is terrible and they have no Audio I/O support 

I'm pretty sure I'm dreaming here but I had to ask - just in case.