You can easily download map of a certain area in your mobile phone using Google Maps for offline use. Thus you can find directions even if you do not have Internet access.
Learn how to measure distance between two places using Google Maps. You can draw the path you want to take while walking, jogging or biking, and Google will calculate the total distance for you. Thus you know the exact distance to your destination before you set out for it.
Learn how to change the primary or default Google account in your Android mobile phone. Instead you can use another Gmail account or Yahoo!, Hotmail email accounts as your default account.
Learn how to enable or disable Google Location History feature. You can view, edit or delete information on your Google Timeline which shows you the places you've visited. Timeline shows you even the route that you took to reach a place and also the photos you took on the way (if any)!
Learn how to restart Android in safe mode. You may need to reboot your phone in safe mode to troubleshoot various issues. For this you do not require any third party apps or apk files.
Learn how to bypass the "device was reset. Sign in with Google Account that was Previously Synced" FRP lock problem in Android phones manufactured by companies like Samsung, Moto, Lenovo, Sony etc.
If you think sensors in your mobile phone are not working properly, you can easily test sensors on your Android device with these free apps to figure out problem. You can test gyroscope, accelerometer, proximity, light, pressure, magnetic field, temperature and other sensors.