Scientific calculator plus 991

Durand van Aardt

1 month ago

Absolutely phenomenal. Just really great. I can see a lot of thought went into this app. All the features are on point, the premium version is not too expensive, and you get a lot for your money. And even the free version is amazing, all of the features you need, and even some that are not necessary but great to have, and the ads are not intrusive. Whoever created this app has my utmost respect

ZEMπ

2 months ago

So far great app for intermidiade level calculations and has all the functions for free provided in a standard scientific calculator. The premium lock isn't annoying since it only restricts you from using very advanced features that you won't find on most budget calculators. If there is an ad problem then launch with wifi off. I don't have to waste my money buying calculator before exams.

abc def

1 month ago

Cannot overstate how useful and brilliant this calculator has been for me, I'm considering buying premium just to support their good work (and also to get rid of the ad bar, which is at times less appropriate than what's expected in the classroom). One gripe is the bias towards ln rather than base 10 logs in solutions, would like an option to fix that.

0bada

2 weeks ago

This calculator is really great. It offers way too many features, probably more than an actual scientific calculator. Deserves 5 stars for all the functionality, however there is one bug that can ruin the experience. Funnily enough, it is the equation on the icon of the app. If you try to run it, it will keep calculating forever. Very similar equations also get stuck for some reason. Thank you for this app regardless :)

Anish Sahoo

2 years ago

Best App Ever!!!! Never have I been more satisfied with a $2 purchase (that is the upgrade which is optional, I highly suggest doing it). The app is already overkill being free as it is, but the upgrade gives access to some great features like automatic equation solving and graphing AND REMOVES ADS, which can make this the only calculator you'll ever need in life. Plus it has a lot of information(JUST CLICK ON THE SMALL SIGMA SIGN UNDER ANSWER BOX), enough to let you pass highschool with ease.

Aaron Samuel

3 years ago

Very useful and quite advanced calculator for a phone. I even find myself using it more than my physical calculator as funny as it seems. Mainly because it can solve a simultaneous equation with 3 uknows, solve cubics...etc stuff that you have to pay $60 for on a physical one. All in all not "SUPER RIDICULOUSLY FANTASTIC" but it surely gets the job done

Blake

9 months ago

I like the design and features of this calculator app, and would get the paid version, but one of the most basic features doesn't work and is a deal breaker: The calculator always clears itself when I close it, regardless if whether or not the "Clear Screen" checkbox in settings is checked or not. I need a calculator that keeps the history right on screen like a real graphing calculator.

Matthew Gaming

3 years ago

It is incredible for students and can help you even after school I bought the pro version I think it was a incredible price would have paid more for it if I knew how good and helpful it would be. Have contacted them for support pretty helpful. I wish they made the tutorial more visible possibly if you opened the app for the first time it asks you if you want to see a tutorial. I wish you could take a photo of a math question and have it be imported instead of writing it all out. Overall happy.

Zach Jibben

2 years ago

Best scientific calculator on android, and I've tried them all. I wish this exact app was on iOS. No other calculator has the right combination of UI, one line per computation, being able to sroll back through calculations, and functionality. Premium is a one time purchase that's absolutely worth it. The only other app that comes close is HP Prime, if you need to bring out the big guns and can deal with a heavier, clunkier app.

Aaron Meighoo

3 years ago

Awesome app. Exceeds expectations. Love the graphing capabilities. Problem: I wanted to see how far I could push it's limits and created a big nested matrix. It became severely unresponsive and I force-closed the app. Now it won't start 😅. It just shows a black screen on startup. Cleared cache and didn't work. Will try reinstalling. UPDATE: Reinstalling worked.

M Emeritz

1 year ago

I want to love the app, but do not trust the solution when including the previous answer in a new term. For example; [ANS] / 2 ... So often, the result is completely wrong! I've verified this by hand and on other calculators. How in the world has this not been caught yet? So frustrating to have to retype large numbers during a timed test. There's also no way to contact the developer through the app. The 'feedback' button is effectively nonfunctional, hence this review.

undoctrinated

1 year ago

Does nearly everything (and then some) that I can think to ask a calculator to do. No intrusive ads, the UI is super customizable, it keeps history, and it has a handy lil' nugget I lucked upon: you can create shortcuts for often used conversions. Easily and quickly accessible on my homepage, I have mph ›› ft./s and mph ›› s/mi. (mild obsession with timing common activities). I have only one complaint - I hate the icon. Lol. Hardly counts. Best calculator though, and I have tried many others.

Neftali Pineiro

10 months ago

Excellent calculator. So far, it seems to have most, if not all of the functions that I need for at least high school math. Furthermore, I kind of use it as a notepad for numbers. While I leave many numerous mathematical problems on the calculator screen, I go on to the next one by just simply scrolling it down and calculate anew from that point on. Or I can take a single problem and break it down in screen separations, step by step. The one step not interfering with the other one,if so wanted.

Taha Aldorie

4 months ago

I bought the premium version and I am happy with my purchase so far. One issue I noticed is the "click here to test the sound" on the keyboard settings does generate only one tone and that need to be corrected to reflect the actual sound from the selection list.

Glenn Rossi

5 months ago

I bought the Premium App (Version 6.9.7.704) and installed it today. It offers many nice features, but I am experiencing two problems. First, there appears to be a calculation error in the graph mode: f(x) = sin(x) gives correct values, but f(x) = sin(x)^2 gives wrong values. At 30 degrees (0.52 rad), the second equation above gives around 0.24 instead of around 0.27! I made a screenshot of the error which I can send. Second issue: I cannot change x-axis values to degree instead of rad!

Sam Haggag

3 months ago

I have the paid version and used to love it, but it seems like a recent update has caused undesired updates. It now says "initializing math engine"when I open it, and it also seems to be erasing calculation history for no reason even though I have that option unchecked. Very annoying when an app gets worse for no good reason! It now really annoys me!!

Angela Abrams

4 months ago

I have the paid version. This is my go-to app when I want a calculator with advanced features. But it needs better documentation, and it's missing a few features (or they're there, and I can't find them, such as adding and subtracting clock times took too long to figure out - didn't think of the °'" key). Also, sometimes I get wonky answers, such as when taking the square root of a mixed number that is input with the fraction key rather than the mixed number key. I would think both should work.