Five Hacks Every Amazfit T-Rex 3 Pro User Should Know

We may earn a commission from links on this page. Amazfit's T-Rex 3 Pro has a lot of great headline features: A titanium bezel, a sapphire display, multi-week battery life, and on-device route planning for its “pro” version. And at $399.99 , it's still on the budget end compared to similarly feature-rich rugged sports watches. Turns out, you can get even more out of this watch with some Amazfit-specific hacks . Here are five features in the Amazfit T-Rex Pro that go a bit beyond the manual. Amazfit T-Rex 3 Pro $399.99 at Amazon Shop Now Shop Now $399.99 at Amazon Unlock a secret developer mode in your Amazfit watch In the Zepp app , go to Profile > Settings > About , then tap the Zepp logo seven times. Voilà: You've just unlocked developer mode. It's a fun rabbit hole if you like poking around under the hood, and it can occasionally be useful for troubleshooting sync issues or checking firmware details that the standard interface hides from you.  Developer mode also lets you install custom watch faces, rather than relying on the existing native watch face library and upload a custom face on your computer, scan a generated QR code, and install it directly onto your watch. Let the flashlight do more than light your way Most users know their T-Rex 3 Pro has a built-in flashlight, activated with a long press of the UP button, and the Pro version specifically pairs a white LED with a red one. The red light is the real hidden gem: it preserves your nig…