Very useful and easy to use app. I use the frequently for woodworking and metal working layouts. However I have a few suggestions. (1) it would be very useful to have a memory store and memory recall. These seems to be room for two more buttons down at the bottom. Maybe to the right or left of the equals buttons. This would be useful because I frequently divide a sum of multiple fractions within a longer equation. (2) since this is a paid app there is room to make more money with a scientific calculator addon/extension/plugin. Here Im thinking of another calculator that can be accessed right within this one. For layout work I friendly do trig calculations to get coordinates within a layout. Currently this means that I hop in and out of two calculator apps. I would pay more to have this fraction app integrated with a scientific calculator. Now if you really wanted to get fancy, these two calculators could share the same memory store/recall buffer. The trick would be to round the full floating point decimal from the scientific calculator to a fraction in this calculator. This could be configurable by the user. That is, round to the nearest 1/32, 1/64, 1/128 based on how I have the app configured. Wait a minute, ..., I might just designed your competition :-) Better act fast! This is sounding like a good idea, at least to me. What do you think?