This app offers guided instrument tuning for guitar and ukulele, a microphone-based frequency meter, and various tone generation tools. It also includes measurement history and an ultrasonic scanner for audio analysis.



249+ iOS apps curated and reviewed
Out of 249+ frequency counter+ hz fft apps on iOS, 16 are free and the rest sit in the paid tier. This page sorts them so you can compare both sides before you commit.
| # | App | Price | Rating | Ads | In-App Purchases | Updated | |
|---|---|---|---|---|---|---|---|
| 1 | Free | 3.3★ (6) | Yes | No | Nov 2026 | ||
| 2 | Free | — | No | No | Jul 2026 | ||
| 3 | Free | 4.5★ (21) | No | No | Nov 2026 | ||
| 4 | Free | — | No | Yes | Oct 2026 | ||
| 5 | $2.99 | — | No | No | Jun 2026 | ||
| 6 | Free | 4.3★ (24) | No | Yes | Nov 2026 | ||
| 7 | Free | 4.7★ (23) | No | Yes | Nov 2026 | ||
| 8 | Free | — | No | No | Aug 2026 |



This app offers guided instrument tuning for guitar and ukulele, a microphone-based frequency meter, and various tone generation tools. It also includes measurement history and an ultrasonic scanner for audio analysis.









This app transforms your device into a real-time audio analysis toolkit. It visualizes sound frequencies, measures loudness, generates tones, and even includes a hearing test. Ideal for musicians and audio professionals seeking precise sound insights.