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Diatronome vs FMIT: catalog facts
Diatronome	FMIT
Free Free and open source under GPL-3.0-or-later.	Free Free and open source under GPL-2.0 and LGPL-2.0 licenses.
Android	Windows, macOS, Linux
Combines a tuner, metronome and synthesizer Supports adjustable pitch and transposition	Analyzes fundamental frequency in real time Supports microtonal tuning with Scala files
Android only	Requires an audio input device for live tuning
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0-or-later	License: GPL-2.0 and LGPL-2.0
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked October 8, 2026	Official website Full listing and sources Checked October 8, 2026

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