I have so many friends troubled by tips. Every time we had meal we need a calculator for tips which really slow.
Thinking about that I fixed the tips percents. 15%, 18%, 20%.
Easy, Fast, Clear.
Life Could Be Easier !
The custom button will be added in Version 1.1. Looking forward to it.
Support: iPhone 5, iPhone 5s, iPhone 6, iPhone 6s, iPhone 6 Plus, iPhone 6s Plus
Not support: iPhone 4s and before model