I made it myself to use it comfortably without ads.
Anyone can easily measure illuminance with an easy-to-use screen.

Measures the brightness of the surroundings using the illuminance sensor built into the smartphone.
It is used to check the brightness of daylight or room light bulbs.

Anyone can easily check the brightness with a gauge and graph by automatically measuring the brightness through the illuminance sensor without any separate setting.

simple is good
supersimpletool