It turns out that you can make a bubble level from your smartphone. But there are 2 nuances

At one time, I was surprised to learn that there is an application on the phone that simulates a bubble level, I decided to check it, and was even more surprised.

Check

I thought it was convenient, the device is always with you, and you only take the level when you need it. Why not install, install, but you need to compare the reading with the level.

I put the level on the shelf for the keyboard, it is not in the level, the application also indicated this, good. I expose the device to the horizon and find that the application is lying.

It turned out that the error is 0.2 degrees, and so and so I checked - lying on this figure, it was first nuance. To clear my conscience, I decided to check the plane of the smartphone itself, put it with an edge to the mirror.

I thought the body has a bend, hence the error, but no, everything is smooth.

How to use

The scoreboard helps with the reading, because now the error is known, you just need to take it into account, and that's it.

True, second nuance I was not long in coming, the back cover of my phone has curves, and it is inconvenient to make a mark on it. Conclusion, the idea is funny, but you need to use a special tool.

By the way, I was so surprised at the application error that at first I forgot to check the vertical, and when I checked it, I saw an error of 0.4 degrees. Miracles do not happen!