Fraction Calculator 4+

Working with wood and imperial numbers is a real pain in the app -- but this program is a very simple lifesaver. The only problem is that there's no "welcome screen" that explains how to use it. Here's how:
- if you're inputting 2 3/4 (for example) you click the "2" in the green area, the "3" in the purple area, and the "4" in the blue area -- then you can hit " " or whatever operation you need.

there are better reviewed calculators but if you're really trying to deal with fractions this is the bomb.

suggestion to the developer: have a "how?" button on the app (maybe to the right of the stoplights) that explains what I just wrote above and also has a link to launch your email for further questions. also, I was trying to use it by typing on a keyboard and that did not work (it made 4 1/2 into 42/2 (division operation). maybe make "command /" into the fraction operator? so I could type 4 space 1 command / 2 to input "4 1/2"? (if you do that, add it to the "how?" instructions

I often need to add a variety of different fractions when building cabinets and this app makes this task super simple. Would be great if I could see all the dimension I had entered so I can verifiy I entered them correctly versus what I do now which is add the dimension several times to verify I get the same result.

I would very much like to see a "Paper Tape" added so I can go back and see my work to make sure I didn't fat-finger an entry to comfirm the results.