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Tuner
Editor’s ChoiceA strong free pick for music on iPhone.
Pros
- Chromatic tuner with live Hz display and color-coded feedback (blue = in tune, yellow = close, red = adjust)
- Auto Mode detects the string you're playing automatically
- 15 tuning presets: Standard, Drop-D, Drop-C, Drop-B, Open-G, Open-D, Open-C, and more
- Guitar (6-string) and Bass (4-string) modes with dedicated preset libraries
Cons
- Some advanced features may need an in-app purchase.