# The Best Calculator - Calc Pro — user reviews > 316 indexed App Store user reviews of The Best Calculator by Panoramic Software Inc., rated 4.60/5 from 4,713 ratings. - Source: https://appshunter.io/ios/app/the-best-calculator-calc-pro/id451544502/reviews - App overview in markdown: https://appshunter.io/ios/app/the-best-calculator-calc-pro/id451544502.md - Rating breakdown: 5★ 3,674 · 4★ 614 · 3★ 182 · 2★ 66 · 1★ 177 ## What do users think of The Best Calculator? Overall sentiment: positive **Pros** - 👍 Great app - 🚀 Versatile and comprehensive - 👍 Easy to use - 👍 Excellent calculator - 👍 Useful features - 👍 Handy tool - 👍 Impressive - 👍 Awesome **Cons** - 🐛 Crashes frequently - 🔋 Ads disrupt usage - 🐛 Unstable - 🔒 Purchase issues - 🐛 Doesn't work on newer iOS versions **Commonly reported bugs** - Crashes on launch - Ads block access to calculator - Paid version still shows ads - Conversion update lags behind real-time **Most requested features** - Horizontal layout option - Ability to edit/reuse calculations from tape - More unit conversion options - Standard deviation function in statistics mode - Dark mode ## Newest reviews (14 of 316) ### 2/5 — Currency Exchange *2026-05-13, version 6.10.0* May 12 2026 I keep sending feed back about this but it’s still the same. It’s so annoying that the app on currency keeps defaulting to USD GBP It should stay on last used or there should be an option to choose my defaults. I hate the fact that I have to constantly (every time) I use the app select my frequently used currency Because it keeps defaulting to USD GBP PLEASE FIX IT I can’t stand the fact that I have to keep selecting the currency I’m trying to convert to every single time. It never keeps the last used or (short cut it should have for most frequently used). In short… I have to always scroll to find my most used currency conversions. I would rate this 5 out of 5 but the annoyance of the currency which I use mostly, is quite frustrating. THE app is honestly quite amazing. I use the other aspects of it but I mostly use the currency conversion Update Dec 28 2025 Last used currency conversion still not dealt with on this app. I would rate it higher, but I reviewed this sometime ago and no update has been done on that aspect for frequently used currency conversions. That’s why it gets a two out of five. ### 2/5 — Currency Exchange *2025-12-28, version 6.10.0* I can’t stand the fact that I have to keep selecting the currency I’m trying to convert to every single time. It never keeps the last used or (short cut it should have for most frequently used). In short… I have to always scroll to find my most used currency conversions. I would rate this 5 out of 5 but the annoyance of the currency which I use mostly, is quite frustrating. THE app is honestly quite amazing. I use the other aspects of it but I mostly use the currency conversion Update Dec 28 2025 Last used currency conversion still not dealt with on this app. I would rate it higher, but I reviewed this sometime ago and no update has been done on that aspect for frequently used currency conversions. That’s why it gets a two out of five. ### 3/5 — No Amps? *2024-10-27* I got the free version to try it out, but it does't have Amperes. I was trying to calculate if a power-supply would work on another device. Uninstalling for now. May try it later. ### 3/5 — Currency Exchange *2024-09-28, version 6.9.0* I can’t stand the fact that I have to keep selecting the currency I’m trying to convert to every single time. It never keeps the last used or (short cut it should have for most frequently used). In short… I have to always scroll to find my most used currency conversions. I would rate this 5 out of 5 but the annoyance of the currency which I use mostly, is quite frustrating. THE app is honestly quite amazing. I use the other aspects of it but I mostly use the currency conversion ### 2/5 — Can’t Close Ads *2024-07-10, version 6.9.0* This is a great calculator BUT unfortunately I can’t use it half the time when I want to because an ad will appear upon opening and the x mark to close the ad won’t work because it’s on top of the time or battery icon on my phone. So unless I capitulate to being forced to open an unwanted ad I just have to wait a ridiculously long time for the ad to disappear or come back later and hope I get the calculator screen instead of an ad. Very frustrating. ### 2/5 — Bought in 2012 now we ant me to pay again *2024-05-29, version 6.9.0* The fact that I bought this app back in 2012 and the company wants to charge me again for an ad free version make me feel short changed. ### 4/5 — Good calculator *2023-12-28, version 6.9.0* The math works fine. I can't get it to convert any units of weight except grams and kilograms. ### 2/5 — Great concept but unstable *2023-11-27, version 6.9.0* I would love this calculator if it didn’t crash every few calculations. It has been this way for years. Looking for an alternative. ### 5/5 — Súper *2023-09-29, version 6.9.0* Muy buena la app con muchas prestaciones ### 5/5 — Best calculator I have found *2023-08-04* Tried many before this app. This calculator offers basic standard calculator and many excellent specialty calculators. The one off purchase option is fair value and much more reasonable than other calculators which require a monthly or annual subscription fee. ### 4/5 — RPN *2023-07-16, version 6.9.0* Unfortunately the exponential funtion EEX does not work in RPN Scientific calculator mode and as that is my mode of choice this is a dissapointment on what is otherwise a very useful set of calculators ### 5/5 — Calc Pro *2023-03-12, version 6.8.6* All the calculator I ever needed ### 5/5 — Versatility *2022-12-08, version 6.8.6* By far the most versatile calculator apart from money conversion… ### 5/5 — Very versatile *2022-10-26, version 6.8.6* Not that many calculators that do both standard and reverse polish ## Most critical reviews (10 lowest-rated) ### 1/5 — Nice app, blocked by ads *2026-08-28, version 6.10.0* Very happy with the app I paid one-time fee, now I can’t use because ads pop up and can’t be navigated through! You bricked your own app, no patience for that! ### 1/5 — Can’t Close Ads So Practically Useless *2026-07-15* Doesn’t matter how good it is because after a few calculations an unclosable unwanted ad pops up covering the entire iPhone screen and remains there for an eternity trying to force you to click on it. Meanwhile you can’t use the calculator so don’t bother. This is just a clickbait machine! ### 1/5 — Where Are The Cooking Conversions *2026-03-19, version 6.10.0* I used to use this calculator app for cooking conversions. I think there was even a labeled cooking section under the calculator types. I don't see it anymore. ### 1/5 — Paid for App, still stuck with Ads!! *2023-12-05, version 6.9.0* I like the app, but after paying for the app I still get the ads!! It states if you purchase, the ads go away! Didn’t work out that way. No one has offered a fix and I’m still out $8. I cannot use he app without being interrupted with an add. Most frustrating. ### 1/5 — interruptins *2023-09-24, version 6.9.0* your surveys are distracting, extremely so ### 1/5 — Ok app, bad customer services and scam like business *2023-03-31* I paid the full price of the Calc Pro $9.99 used very sparingly, got an update version 6.9 and now the app is playing ads constantly and asking to pays another full price. Contact via them via email, and their website to no avail. Clearly the developers are running this App like a scam. ### 1/5 — Missing obvious constants *2022-04-25, version 6.8.6* 1 star for having the first thing I wanted ( plank length ) missing. You call this pro?! Why would you have plank time but not plank length? ### 1/5 — If looking for a Statistics calculator, keep searching *2022-04-20* One of their calculator is a statistics Calc, and a sorry one it is at that. It has a small list of linear regression functions, some permutation and combination calculations but not even a standard deviation function. Forget about X2 function either or z values and probabilities, average, correlation, or even median. To call this a stats Calc is just wrong. I would rate it zero star if I could. Somehow they think inverse tangent, cosine, etc is part of the basic stats tools. Wish I could get my money back. Maybe they omitted a screenshot of their statistical calculator on their App Store description for a reason… ### 1/5 — 支払ったのに *2022-03-01* 計算機の機能としては秀逸です。 広告が全面なうえ、カウントダウンして右上に閉じるための✖️が出ますが、そこは押しづらくなかなか閉じられなくて、支払いしたんですが広告が消えません。 他の計算機アプリを探すので返金して欲しいです。 ### 1/5 — . *2022-02-05* Мусор ## Most praised reviews (10 highest-rated) ### 5/5 — Great calculator *2026-06-12, version 6.10.0* TY enjoy. Using it ### 5/5 — кПа *2025-08-06* Добавьте пожалуйста в конвертер давления единицу кПа, очень не хватает. ### 5/5 — Прекрасно! *2025-05-08* Обратная польская система счета реализована прекрасно! Кто понимает, будет восхищение. При этом куча других возможностей. И конвертация, и обычный калькулятор. Короче, много чего попробовал. Это приложение прекрасно отшлифовано для любого пользователя. Вплоть до настойки расцветки. Вот же заморочился создатель! Респект и уважуха! ### 5/5 — Great ! *2025-04-08, version 6.10.0* Would be nice if there was a monthly add on to compound interest ### 5/5 — Excellent *2025-02-06* Good ### 5/5 — Calculatrice *2024-12-30, version 6.10.0* Très satisfait mais on devrait pour lire ce qu’on enregistre. Exemple si l’on additionne 28+33 on ne voit pas ce que l’on écrit, la réponse est visible • ### 5/5 — The best calculator *2024-04-02* I have used this for several years on both my iPad and iPhone. It is far and away the best. ### 5/5 — The End of My Search for Calc Apps *2024-03-04, version 6.9.0* I use pi a lot and it is nicely placed on the keyboard. I prefer rpn. Even the appearance is aesthetically appealing. ### 5/5 — It’s COOL *2024-02-04, version 6.9.0* Yay ### 5/5 — メモリーキーが良い *2023-12-08* メモリーキーが使いやすいですね。MSキーが嬉しい。 更に欲を言えば使用頻度の高いMS、MRを右に配置し、左からM+,M-,MS,MRの順が良かったかな。それでも★５に変わりはありません。 --- *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 2026-09-02.*