Sketchy, at best. There actually is/was a paid version to remove ads. I still have it on my phone. However, I cannot find it on the market anymore, nor can I find it through this app. This leads me to conclude that these developers still have much to do with this app before they start charging again for a "no-ad" version of the app. With no support on my "no-ad" version (called Formula Droid), I must give this app 1 star.
King of Apps..... It is one of the finest app I have ever used. Its formulae, derivative calculator are excellent. Most of all, its scientific calculator has large no. Of functioning along with graph plotter which is not present in much of calculator apps together....really love this app...
Annoying prompt I had purchased this app a while back. It was a good program and I wanted to support development. The paid-for app was removed by author. I reinstalled this and now I get an e-Nag about installing a game. Dissapointed and uninstalling.
Best ever Superb. Easy to use, full details, math game, facts, everything is awesome. Only a problem with my handset (htc wildfire) is that i cant read whole fact page if it excids the screen. Can't scroll the page.
Very helpful but... Great app! Extremely helpful. But there are repeated, and sometimes incomplete facts. Also, in the math section, lots of definitions and explanations are cut off. And for some reasom, the game thing will show the queations AFTER I enter an answer. Because of this, I can't play the game properly. Please fix all these errors and I will rate it 5 stars. This is samsung galaxy 7.0 plus BTW.
Best thing ever This app saved my @$$ in a methods test. Was going to delete it on many occasions, but never did. Lucky I didn't. Used the stuff for my cheet sheet. This app is a life saver.
added hardware acceleration.