249+ iOS apps curated and reviewed
The best fft analyzer apps on iPhone average 4.3★ across 249+ titles — we've ranked them by what real users actually keep on their phones. Updated September 2026.
| # | App | Price | Rating | Ads | In-App Purchases | Updated | |
|---|---|---|---|---|---|---|---|
| 1 |  | Free was $10.99 | 4.6★ (1K) | Yes | Yes | Sep 2026 | |
| 2 |  | $4.99 | — | No | No | Sep 2026 | |
| 3 |  | Free | 5.0★ (4) | No | No | Aug 2026 | |
| 4 |  | Free | — | No | No | Aug 2026 | |
| 5 |  | Free | 4.6★ (161K) | No | Yes | Sep 2026 | |
| 6 |  | Free | 4.3★ (15) | No | No | May 2026 | |
| 7 |  | $6.99 | — | No | No | Sep 2026 | |
| 8 |  | Free | 2.3★ (3) | Yes | No | Sep 2026 |
This application analyzes audio input from your microphone, displaying both the waveform and amplitude spectrum in real-time. It offers extensive customization for display, calculation, and signal generation.
This application provides real-time audio spectrum analysis with clear, smooth visuals. It offers advanced features like peak hold and multiple window functions, all processed locally on your device without ads or data collection.
