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iReal Pro vs Chord Progression Helper: catalog facts
iReal Pro	Chord Progression Helper
Paid One-time purchase per platform, with optional style packs as in-app purchases.	Free Free and open source under the Apache-2.0 licence.
Windows, macOS, Linux, Android, iOS	Android
Backing tracks in more than 50 styles Any key and tempo	Songs built from parts and measures Adds drum beats and melody to chords
Bought separately for each platform Some styles cost extra	Young project, started in 2026 Android only
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: Apache-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 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.