easy calclate

・ Register with EDIT MODE button
・ Up to 10 registered characters, up to value 999,999,999
・ 1 page 15 buttons, total 45
・ Plus with tap, minus with long press
・ You can also enter numbers directly.
・ Recommended resolution 1080x1920
Since it works on Android4 or higher, please use the old smartphone effectively.