This application enables Over-The-Air Device Firmware Upgrade (OTA-DFU) for nRF5 devices using Bluetooth LE. It supports updating firmware in .zip format, prepared with the 'nrf util' tool.
TT02 DFU Tool by SYSGRATION




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TT02 DFU Tool is the household name in tt02 dfu tool, but it's far from the only option. We track 221+ alternatives and competitors on iOS — many free, many higher-rated than you'd expect.
| # | App | Price | Rating | Ads | In-App Purchases | Updated |
|---|---|---|---|---|---|---|
| 1 | Free | — | No | No | May 2026 | |
| 2 | Free | 2.7★ (9) | No | No | Aug 2026 | |
| 3 | Free | 4.7★ (14K) | Yes | Yes | Aug 2026 | |
| 4 | Free | 4.5★ (449) | No | No | Aug 2026 | |
| 5 | Free | 1.7★ (3.2K) | No | No | Aug 2026 | |
| 6 | Free | 4.3★ (5.5K) | Yes | Yes | Aug 2026 | |
| 7 | $0.99 | 5.0★ (1) | No | No | Jul 2026 | |
| 8 | Free | 4.2★ (3.2K) | Yes | Yes | Aug 2026 |







This application enables Over-The-Air Device Firmware Upgrade (OTA-DFU) for nRF5 devices using Bluetooth LE. It supports updating firmware in .zip format, prepared with the 'nrf util' tool.






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