iFormulas App Reviews

The derivative of tan(x) is secant squared x not sec(x).

Thanks for this great app, I dont have any problems with it. Very useful!

There is an error with a formula. Please correct. Under "trigonometry" , "definition" COS £ = C/A. should be COS £ = C/B. C is adj. B is hyp A would be opposite thanks for updating

Needs illustration related (for geometry) formulas... It would be really helpful and more clear. Thank you for your work!

Everything I need is in this app. Thanks!

i ll show this app to my math teacher so he ll think im interested in math :P haha

İ like this

This app is great + very functional. Highly recommend it.

This App Needs Turkish Language

FIX THE CRASHES! The one time I actually need a formula and the app crashes on me like 4 times in a row! FIX!

This app is great. I use it mostly for Calculus whenever I need to remember a quick formula. One thing I would like to see is graph visualizations or graph examples, especially for the right and left hand limits. Honestly, this app does great without it, but the graphs would make it better.

Never got to use it because it crashes the instantly I try to pull up a formula. VERY dissatisfied.

I think this is the best formula reference out there but it crashes a lot please make it not crash. I use this app so much but it shuts off on me too often

I love the formulas but it keeps crashing on me. Please fix this

this would be a great app if it didnt constantly crash

All I get is two minutes if Im lucky before it crashes. I would otherwise give it a 4 rating

The info in the app is great but the crashing is very annoying. It crashes every time I start the app. If it were not for the continual crashing, this app would have five stars.

The app will not stop crashing! MY INTERNET IS MESSED UP! It was working fine till I got this app. Now it wont stop.

Constantly crash. Very bad app.

very great app but it crashes after being open for 20 seconds. otherwise would be a solid 4 1/2.