Test the low-frequency capabilities of your speakers with precise sound frequencies. Pinpoint the lowest bass your audio system can produce, from 15Hz to 100Hz, to ensure you're not missing out on deep sounds in your music.





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With an average user rating of 4.0★, the suqoof category is one of the App Store's strongest. Browse all 174+ apps we track, sorted so the most loved ones surface first.
| # | App | Price | Rating | Ads | In-App Purchases | Updated | |
|---|---|---|---|---|---|---|---|
| 1 | Free | — | No | No | May 2026 | ||
| 2 | Free | 4.0★ (10) | No | No | Oct 2026 | ||
| 3 | Free | 4.8★ (12) | No | No | Oct 2026 | ||
| 4 | Free | 4.4★ (7) | No | No | Oct 2026 | ||
| 5 | Free | 4.5★ (8) | No | No | Oct 2026 | ||
| 6 | Free | 4.3★ (4) | Yes | No | Oct 2026 | ||
| 7 | Free | — | Yes | No | Oct 2026 | ||
| 8 | $14.99 | 3.0★ (1) | No | No | Oct 2026 |






Test the low-frequency capabilities of your speakers with precise sound frequencies. Pinpoint the lowest bass your audio system can produce, from 15Hz to 100Hz, to ensure you're not missing out on deep sounds in your music.






Easily set up and control compatible MartinLogan subwoofers via Bluetooth. Adjust volume, filters, phase, and listening modes. Features a tone sweep to identify and resolve room rattles.