249+ iOS apps curated and reviewed
The best hertz frequency reader apps on iPhone average 4.4★ across 249+ titles — we've ranked them by what real users actually keep on their phones. Updated October 2026.
| # | App | Price | Rating | Ads | In-App Purchases | Updated | |
|---|---|---|---|---|---|---|---|
| 1 |  | Free | 3.3★ (6) | Yes | No | Oct 2026 | |
| 2 |  | Free | 4.5★ (169) | No | Yes | Oct 2026 | |
| 3 |  | Free | 4.7★ (340) | Yes | No | Oct 2026 | |
| 4 |  | Free | 4.3★ (20) | No | Yes | Oct 2026 | |
| 5 |  | Free | 4.5★ (4.8K) | Yes | Yes | Oct 2026 | |
| 6 |  | Free | 4.4★ (8) | No | No | Jul 2026 | |
| 7 |  | Free | — | No | No | Jul 2026 | |
| 8 |  | Free | — | Yes | No | Aug 2026 |
This app transforms your iPhone into a powerful audio analyzer. It offers four distinct modes to measure sound frequencies, tune instruments, analyze motor speeds, and check mains stability. Advanced features include measurement history, comparison tools, and CSV export.
Transform your device into a professional audio analysis tool with advanced FFT analysis, SPL monitoring, and detailed visualizations. Record, analyze, and export audio data with precision calibration and multiple weighting filters.
Generate various sound waves, including sine, square, sawtooth, and triangle, with adjustable frequencies from 1Hz to 22000Hz. Visually observe animated sound waves and control volume. Useful for testing hearing, speakers, instruments, and even cleaning water from speakers.
