# FX Calculus Problem Solver — user reviews > 66 indexed App Store user reviews of FX Calculus Problem Solver by Euclidus Inc, rated 3.38/5 from 78 ratings. - Source: https://appshunter.io/ios/app/fx-calculus-problem-solver/id833967111/reviews - App overview in markdown: https://appshunter.io/ios/app/fx-calculus-problem-solver/id833967111.md - Rating breakdown: 5★ 28 · 4★ 16 · 3★ 9 · 2★ 4 · 1★ 20 ## Newest reviews (12 of 66) ### 4/5 — ASU Great *2020-12-18, version 3.0* Assuredly, Thanks! ### 4/5 — Great for Review *2020-06-26, version 3.0* This app has been excellent at helping me remember calculus concepts that I might forget. Obviously, there are a few flaws, but it’s pretty good overall. ### 4/5 — Summation missing. *2020-05-09, version 3.0* I have had this app for a couple of years now and Appreciated it greatly until I tried to do a summation. This seems to be a serious flaw considering the manner in which calculus is taught. What is one to do, use an integral instead? ### 2/5 — Glitchy and lacking *2018-09-27, version 2.3* The first calculation I performed with this app crashed and didn’t even have the factorial (!) key. Still looking for a good one.... ### 2/5 — Don’t go Premium *2018-04-24, version 2.3* Every time I try to calculate a problem, it shows an error. It’s useful as a resource but that’s all. ### 3/5 — Needs organization *2018-04-12, version 2.3* Great for simplex problems, but needs a lot of organization. A lot of problems I have I can't input because the sustem doesn't allow it. ### 3/5 — ITS A BEST APP EVER BUT... *2018-02-21, version 2.3* As I mentioned this app is the best app I ever come across to help me to solve my maths problems But unfortunately even I’ve bought the premium version whenever I come to app to use it would ask me to put my Apple password to get premium which is so bad because I already purchased it. I hope they will fix this issue soon, then I will give you 5 stars. One more suggestion it would be really great and helpful if I could use the built in camera to recognising the question instead of typing a lot, because I saw that feature on Photomath app which is great. ### 3/5 — Hi *2017-05-31, version 2.3* This application has a bug after solving 2 or 3 operations the application does not want to work, you have to delete it and reinstall it ... why ?? ### 3/5 — Works well *2017-05-14, version 2.3* Works well but does not simplify derivatives ### 3/5 — Good, but needs work. *2017-02-28, version 2.3* I love how it works like mathway in the way it shows all of the steps but you only need to pay once instead of monthly. I wouldn't mind if there were ads so they could get a little money towards improving the app though. For example, it fails when I don't have a really really good connection and it does crash a lot when I try more complicated integrals. Sometimes, the menus won't unexpand and I don't have great eyes which makes it harder for me to see. Plus, I keep on having to add extra inputs into the keyboard. I can't save the layout or anything like that. Other than that, it's a pretty well put together app. ### 4/5 — Rate *2016-10-14, version 2.3* Hello sir It's best but not complete. Best regard. ### 4/5 — Awesome! *2016-09-16, version 2.3* I payed for the app and it's cool! However it needs more capabilities, maybe like INC and DEC coordinates on my graph and what about MiN and Maxima? I guess it'll have to do though.. ## Most critical reviews (10 lowest-rated) ### 1/5 — Don’t download this shi *2020-03-24, version 3.0* It’ll ask u for your Apple ID. Don’t put your password in. And u gotta pay for the content that is really important. ### 1/5 — I feel scammed *2019-11-13, version 3.0* So the app worked fine, Until I paid the premium version which cause my app to never open again. There goes my 10$. ### 1/5 — This app is a scam *2019-01-01, version 3.0* Paid $6 for full access as soon as I paid app stopped working. Scam. Save your money. ### 1/5 — Animated Solutions Board is not functioning *2018-10-20, version 2.3* Though this application has topics and concepts that are seemingly helpful, there are parts that don’t function as expected. I purchased the premium package sometime ago with an older iPhone... it worked. I have had my iPhone X since they were first released, and the above referenced feature crashes when I attempt to launch it. I sent an email several days ago, but have not heard back from the support team. Hopefully, the app is still supported and is not one of those the developer allows to die on the vine!! On a scale of 1-5 with 5 being highest: Reliability - 1 Quality performance - 1 Customer Service - (-1) off the range Information - 1 Value/Price - 1 Overall, one star until, and if it’s corrected!! ### 1/5 — Poor *2018-10-09, version 2.3* It’s good But requested for payment after solving 3 questions ### 1/5 — Doesn't work *2017-10-19, version 2.3* Gave wrong answers for simple differential problems. Uninstalled ### 1/5 — Garbage app *2016-12-09, version 2.3* DO NOT BUT THIS APP!! Worked the first couple times for free but as soon as I paid for it all I got was error, every time I input a problem!! Total scam ### 1/5 — Gives no equation *2016-11-17, version 2.3* Not a calculator either ### 1/5 — Worst app in the apple store *2016-09-13, version 2.3* App keeps freezing when i click the solve button ### 1/5 — Crashed. *2016-09-06, version 2.3* You have to buy the app after solving a few problems.. So I did only for the app to start crashing. Whenever I would hit the "solve" button, it freezes and crashes. Don't waste your time. ## Most praised reviews (10 highest-rated) ### 5/5 — Wonderful *2025-03-15, version 3.0* I only write reviews when I am impressed with the app. I am extremely impressed with this calculator "plus". Excellent work. One quirk is having to add keys to the keyboard, however, I can deal with that. Thanks! ### 5/5 — Thank you *2022-02-02, version 3.0* Great… ### 5/5 — Nice one payment site helped me a ton in calc *2021-02-14, version 3.0* Nice it was amazing ### 5/5 — Love it *2020-09-16, version 3.0* Best investment of my college career ### 5/5 — Nice *2020-08-12, version 3.0* Nice ### 5/5 — Astounding ! this is The Best of All Time !! *2019-03-14, version 3.0* a Bohemian Rhapsody of Mathematics !! ### 5/5 — Excellent *2018-11-14, version 2.3* The recent update is much appreciated. This is one of the finest math-review tools I use. In an instant math concepts can be researched and I find my forgotten knowledge refreshed, well done. ### 5/5 — Definite thumbs up. *2018-07-19, version 2.3* As a high school math teacher- who left the classroom to raise our daughter- I find this app to be very useful. I remain certified and tutor many students. The problems give me practice and refresh me on concepts that I’ve forgotten. Definite thumbs up. ### 5/5 — Amazing *2018-02-24, version 2.3* Saved my life ### 5/5 — Great for practice *2017-04-12, version 2.3* Excellent math app. Problems fully explained and solved. --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-10.*