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Audio Recorder vs SoundTree Recorder: catalog facts
Audio Recorder	SoundTree Recorder
Free Free and open source under the Apache 2.0 licence.	Free Free and open source under the GPL-3.0 licence.
Android	Android
Optimized for a fast start Choice of M4A (AAC) or WAV recording	Hierarchical topic tree for organizing recordings Bookmarks for marking moments in a recording
Android only Some features such as Bluetooth mic support are still on the roadmap	Android only No cloud sync or backup built in
Downloadable app	Downloadable app
Open source	Open source
License: Apache-2.0	License: GPL-3.0-only
Not stated if an account is needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 2, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.