RECaller

RECaller is a call recording app for Android. The app is a showcase of various Android concurrency/multithreading techniques.

<a href="https://play.google.com/store/apps/details?id=zlyh.dmitry.recaller"> <img alt="Get it on Google Play" src="https://developer.android.com/images/brand/en_generic_rgb_wo_45.png" /> </a>

Published on Play Market: https://play.google.com/store/apps/details?id=zlyh.dmitry.recaller

Features

Allows recording incoming & outgoing calls in background
Record notification can be disabled to make the app work completely silent
Recorded call can be marked as favorite, renamed or removed
Records are filtered for easy navigation
Batch deletion of records which duration is less than 15 seconds

Caveats

Recording of outgoing calls starts even an abonent don't pickup a phone.
Those records usually last less than 15 seconds, so there is a batch option to remove such items.