250+ iOS apps & games curated and reviewed
Ultrasound Barrier is the household name in cat repellent, but it's far from the only option. We track 250+ alternatives and competitors on iOS — many free, many higher-rated than you'd expect.
| # | App | Price | Rating | Ads | In-App Purchases | Updated | |
|---|---|---|---|---|---|---|---|
| 1 |  | Free | 2.3★ (8) | Yes | No | May 2026 | |
| 2 |  | Free | 4.5★ (84) | No | No | Aug 2026 | |
| 3 |  | Free | 4.5★ (4.8K) | Yes | Yes | Sep 2026 | |
| 4 |  | Free | 4.1★ (239) | No | Yes | Aug 2026 | |
| 5 |  | Free | 4.5★ (7.7K) | Yes | Yes | Sep 2026 | |
| 6 |  | Free | 2.3★ (4) | Yes | No | Aug 2026 | |
| 7 |  | Free | — | Yes | Yes | Jul 2026 | |
| 8 |  | Free | — | — | No | Jul 2026 |
This application generates ultrasound waves from your device's speaker to deter common pests. Simply tap the icon of the unwanted visitor to activate the repellent sound. Tap again to deactivate.
This app generates ultrasonic waves to deter pests like mosquitos and insects. The high-frequency sound is inaudible to most humans, providing a repellent effect without disturbance.
Generate sound frequencies from 1Hz to 25,000Hz with a simple interface. Features include wave visualization, adjustable sensitivity, and multiple waveform options. Use it for hearing tests, pet training, or as a prank tool.
