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...

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.

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.

It's a demo Do you really want to study math with ads flashing at the top or bottom (it alternates) of your screen? So distracting! They think the ads don't steal enough screen real estate, so you also get a zoom in/out bar to steal a little more. And there is a nag screen that pops up over and over and over... Maybe the paid version is good, but this one is awful. Promptly removed from my phone. Oh, wait, I just checked the developer's profile. There isn't a paid version. So this is it! A study app with ads flashing... What a terrible idea.

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.

Buggy App crashes when inputing a complex equation on the scientific calculator. Upon typing the equation graph behaves normally when it is only 2d, when the equation is 3d the menu palette and graphical display change to undefined scribbled lines. Other than that everything else is awesome.

Changed my rating: very good I've just changed my rating. This app has lots of good info, and even a scientific graphing calculator. The interface isn't the nicest, and the section on "celebrity" facts could be removed.... (who looking for math formulas cares about Britney Spears?). The translator doesn't work. Always returns "Error: translation failed". But what is a translator doing in a math app? It can be removed as well, as there are other apps such as Color Dict and Golden Dict that have this and are more appropriate. I'd rather have this app smaller than have useless ("celebrity" facts) or redundant (translator - already in other app) tools. The bad part doesn't affect the great part, so four stars anyway.

Disappointing Quite a lot wrong with this app. Just try doing one thing, and doing it well. Interesting facts aren't, translate doesn't and I don't want to play a game.

Nag This app constantly nags me to install some Bubbles game. I am not the least interested in the game. The reference content is useful to me but not useful enough to put up with the nag.

Indispensable Amazing app even with the little annoyances. All the formulae you'll need+decent translator+scientific calculator+unit converter+best periodic table I've seen. HTC Desire

Update needed After choosing to display the graph x^2+y^2 thep app crashes my phone SGS4, upto the point thah hard restart, by holding the power button, is needed

Excellent Wow, do I wish I had this back in high school! Just a simple to use and find formulas that are most needed and used in fields such as Algebra, Trig, Geometry, etc. So easy to find area and volumes! Very useful app.

Okay It is a good app for reference. It is missing many basic formulas, and contains many advanced ones. As cool as that is, I'd rather have more in-depth, descriptions for the more fundamentals, and not so many uncommon formulas. Useful converters and graphing calculator. Please update the interface soon.

Aamir galaxy y I m a student learning education of iit. This app had helped me a lot to save time . I have access ready

Annoying Nice app. Annoying that it keeps wanting me to by a game 'Water Bubbles' every time I do anything within the app.

Good, great info Like this app, would like be great with extra information though, maybe one on fluid mechanics and hydraulics. Annoying advert at the main menu.

Nice For a free reference guide, I have to say this one is nice. I think the formula for calculating the volume of a prism is incorrect, however :)

Nice one Its a great app to use!!!! Good collection of formulae and various calculators Only problem is that the translator never works. Also, the scientific calculator should be a bit more user-friendly..

Great and useful application! But the translator never seems to work...always says translator error. Btw when are the definitions coming out?

Water Bubbles the app ask you to install a game called Water Bubbles "every time" you go back to the main page. "ask me later" doesn't work, uninstalled!!

The translator does not work and If the translator doesn't work just remove it and stop wasting our time It just want to give me a translation error even on random words!.

Cool Awesome app only problem is that on the facts portions, you cannot scroll down when statements are long. Blocked by ads. Over all its awesome!! :)

Y cumin soon..??? A very nice app... But I am waiting for d definitions to come. So dat I can rate it as ***** stars. .. Its showing coming soon since a long tym..!!

Sex facts? Remove sex facts, or rate this as adult only. Dangerous trend. Google should monitor the apps.

Amateur at best Just a bunch of sheets that could easily be found on Wikipedia. Also the shameless advertising for some game no one wants.

In the math section you have an equation (ab+ac) /a. And right next to it you have the variable a and a "not equal" sign with nothing to.the right of

Handy, but Poor Ui Have had this installed on all my Android phones for about 5 years now. It is a simple to use app that brings up a pdf of the equations you are trying to find. However, the UI could use some updating, poor choice of color scheme and does not meet the Material guidelines.

Great App It's the complete package...!! Only issue is with the scientific calculator...crashes sometimes while drawing graph...

Need lot updates. It crashes when used sci.-calculator. Add some new features. Otherwise best

Excellent,Perfect,Fantastic nd lots more By adding da definitions,no other app will be able to match it...superb,i advise every1 to download it...!

About formula lite Its very nice abhi thanks fr dvlpng this nice application its really very helpfull to students and some others also

Changed my rating from 4 to 2 I did it because i primarily use this app from graphing purpose. But now it crashes for the graph of x^2+y^2 or any 3D graph. Please fix this issue. My phone is Micromax A114 having mediatek processor MT6582M.

Plz solve this... Have problem with translator...it never translates, not even single time...always shows TRANSLATOR ERROR...

good for.... this app good for students , pls update for defination.ေက်ာင္းသားမ်ားႏွင့္ သင္ျပီးေမ႔တတ္သူမ်ား အတြက္ပါ အသံုးဝင္ပါ သည္။ galaxy tab 2

Great ! A very good App that really helps the students, this is a must have ( it's would be great if you could add chemical formulas ^^ ) thnx anyways nd keep up the good work !

Excellent App........ Really nice app.. The facts section with Index is just now very easy to use.... Thanx... :-)

Good App. The only problem that I have encountered is the application image does not remain after restart.

Really impressive Awesome must have app... All required things in a single pack that is all u want