Muscle Booster takes information from your device's activity manager to track your steps, speed, and whether the device is stationary or moving (walking/running). This means you need to have your phone with you while walking in order for your steps to be recorded correctly.
Also, please check whether you’ve enabled access to physical activity data on your phone. To do this, please go to Settings > Privacy > Permission Manager > Physical Activity > Muscle Booster > Allow.
The Walking section is currently synchronized with the Motion & Fitness feature and Apple Health, so you can track your steps, speed, and whether the device is stationary or moving (walking/running).
To check whether Motion & Fitness has been enabled, go to your phone’s Settings > Muscle Booster > Motion & Fitness. It’s also important to have your phone with you while you’re walking in order for your steps to be recorded correctly.
You can also integrate the Muscle Booster app with Apple Health, so that the app synchronizes any steps that were tracked using your phone or Apple Watch. Please see the following instructions on how to set that up:
1) Open the Muscle Booster app.
2) Go to Settings > Open Integrations and follow the instructions in the photo below.
3) Tap on Health to enable the integration.
4) Follow the instructions on your screen to complete the process.