Step 1 – Pair the watch Open the DaFit app. Go to "Device" > "Add device." Select "Hk8 Pro Max." Ensure Bluetooth is on and the watch is not paired to any other phone.
Step 2 – Navigate to Firmware Once paired, tap the device avatar at the top of the DaFit homepage. Scroll until you see "Firmware Update" or "Version Update."
Step 3 – Check for new version Tap "Check for updates." The app will ping the manufacturer’s server. If a new version is available, you will see a changelog (e.g., "Fixes ECG display error").
Step 4 – Start the download
Tap "Download." A .dfu or .zip file will download to your phone’s local storage. This takes 1-3 minutes.
Step 5 – Transmit to watch The app will begin transferring the file to your Hk8 Pro Max via Bluetooth. Do not touch the watch screen. You will see a progress bar on the watch showing "Updating..." Hk8 Pro Max Firmware Update
Step 6 – Automatic reboot After 5-10 minutes, the watch will vibrate and reboot. You will see the Hk8 Pro Max logo. Do not interact with it for another 2 minutes.
Step 7 – Post-update sync Open the DaFit app again. Sync your data once to confirm the new firmware is recognized.
Cause: Bluetooth interference or screen timeout. Fix: Keep the Da Fit app open on your phone screen. Disable "Screen Timeout" in developer options.
If your watch is stuck on a logo loop, you may need a manual flash. Warning: This is for advanced users only. Step 1 – Pair the watch Open the DaFit app
If you are uncomfortable with this, contact the seller for a replacement unit.
If your Hk8 Pro Max is stuck on the logo screen or the wireless update keeps failing, you need a manual flash.
Note: This voids unofficial warranties and requires technical skill.
Some newer batches of the Hk8 Pro Max use a different chipset (RTL8763 vs. JL7012). These require Glory Fit or H Band. If you are uncomfortable with this, contact the
Cause: The phone is sending the file too slowly because of background battery saver. Fix: Go to phone settings > Apps > Da Fit > Battery > Set to "Unrestricted."
Older firmware can struggle to maintain a stable connection with the "DaFit" or "Hk8 Pro" companion app. An update resolves lag in notifications and ensures that weather data syncs instantly.
If your step count seems off or the connected GPS keeps disconnecting, a firmware patch is the only permanent fix.