Gradienter

What???
the rainwater just flows into your house?
water accumulates in the sole of the foot when shower?
the ball slips away before you hit it when play snooker?

You'll need this Doraemon Gradienter the help you at this time!
It will help you check whether your location is horizontal, with its nose to give you the perfect answer.
(Place the phone parallel to the detection plane when using this software, DO NOT hold the phone in your hand, so as not to affect the test results.)

if you prefer ad-free, please install the paid version(Gradienter PRO).