Verithiathe honest score on any app
Updated July 2026 · real, multi-region App Store reviews
Head-to-head

Calculator vs Calculator₊

Calculator 4.5★ · Free + IAP 40
Winner Calculator₊
Calculator₊ 4.7★ · Free + IAP 65

Calculator₊ is the better choice for users seeking a more reliable and feature-rich calculator experience, despite its aggressive monetization tactics, while Calculator is plagued by an overwhelming number of ads that severely hinder usability.

Full reviews: Calculator · Calculator₊

Calculator₊ generally offers a more robust and feature-rich experience, including scientific functions and photo math, but users frequently complain about its subscription model and intrusive ads. Calculator, while praised for its themes and basic functionality, is heavily criticized for an excessive number of ads that interrupt calculations and make the app nearly unusable.

Head to head

Features and Functionality edge: Calculator₊R12R14R17R21
Calculator Users appreciate Calculator for its basic calculation abilities, the absence of a limit on numbers, and the ability to change themes and backgrounds R14R17. Some find it helpful for school and learning new things R12R14. However, some users report it's too basic, lacks a backspace button, and cannot perform percentages R21R39.
Calculator₊ Calculator₊ is praised for its scientific capabilities, large fonts, and advanced features like photo math R77. Users find it effective, efficient, and easy to use for various tasks . However, some users note the absence of a 'constant' function, low limits for high number powers, and issues with currency decimal usage in widget mode . There are also reports of bugs, such as division results with periods not displaying correctly R74.
Ease of Use edge: Calculator₊R2R5R8R24
Calculator Many users find Calculator helpful and easy to use for basic math R2. However, some report it can be laggy and confusing, with difficulty returning to start a new question R5R8. Some also found the buttons not big enough R24.
Calculator₊ Calculator₊ is frequently described as easy to use, fast, and efficient . Users appreciate the pleasant overlay and button layout . However, some users experienced lag, particularly when used as a widget, and reported crashes . There are also complaints about the app demanding reviews immediately after download .
Reliability and Performance tieR3R5R39R74
Calculator Calculator is generally functional for basic tasks R3R39. However, users frequently report the app being laggy R5.
Calculator₊ Calculator₊ is generally seen as reliable and performs well for calculations . However, some users have reported bugs, such as division results not displaying correctly and the app crashing R74. There are also reports of severe lag and incorrect currency decimal usage when the app runs as a side-widget .
Price and Value (including ads) tieR3R4R6R10
Calculator Calculator is free with IAP, but users overwhelmingly criticize it for an excessive number of intrusive and annoying ads that pop up frequently, interrupt calculations, and make the app useless R3R4R6R10. Some ads are described as deceptive, even claiming viruses R10.
Calculator₊ Calculator₊ is also free with IAP, but its monetization strategy is a major point of contention. Users are frustrated by pervasive ads and a subscription model that they feel is too expensive for a calculator, with prices like $5.99 per month or $60 per year R63R64. Many feel it's not worth paying for features that are free elsewhere or that they already paid for but can't access on a new device R73R76. Users also report misleading tactics to push subscriptions .
Support and Updates tieR73R74R99
Calculator There is no specific feedback on support or updates for Calculator in the provided reviews.
Calculator₊ One user, a paid subscriber for years, reported a bug with division results not displaying correctly and requested a fix R74. Another long-term paid user lamented the removal of keyboard support and requested its reinstatement, noting a lack of developer response R99. A user also reported not being able to download what they paid for on a new phone R73.
Pick Calculator if

you need a very basic calculator and are willing to tolerate a constant barrage of ads, or if the aesthetic customization options (themes, backgrounds) are a primary draw for you R14R17.

Pick Calculator₊ if

you require a calculator with more advanced features, such as scientific functions or photo math, and are prepared to either navigate aggressive ad placements or pay for a subscription, despite user complaints about its value R77.

Evidence note: The evidence for both apps is heavily skewed towards complaints about ads and monetization, which is common for free apps with in-app purchases. Calculator's reviews are almost entirely dominated by ad complaints, making it difficult to assess other aspects comprehensively. Calculator₊ has more diverse feedback, but its pricing model is a significant negative point.

Frequently asked

Are these calculator apps truly free?
Both Calculator and Calculator₊ are free to download but include in-app purchases and ads, which users find intrusive and disruptive R3R4R6R63.
Do these apps have a lot of ads?
Yes, both apps are heavily criticized for having too many ads; Calculator users report ads appearing every time a function is clicked or interrupting calculations, while Calculator₊ also has numerous ads and demands payment to remove them R4R10R15R31.
Is Calculator₊ worth paying for?
Many users believe Calculator₊ is not worth its subscription price, which can be as high as $5.99 per month or $60 per year, arguing that its features are available for free elsewhere or that a calculator should not require a recurring payment R64R76R77R82.

What reviewers actually said

Built only from these 120 real reviews (foreign ones translated). Superscripts jump to the quote here. Apple has no per-review links, so [ref] opens that app's reviews on the App Store.

  1. [R12] Calculator 3/5 · US Calculator: I like the calculator because I can learn new things
  2. [R14] Calculator 5/5 · US Helps a ton: Calc is a life saver for school and it has so many pretty backgrounds to choose from and it is completely free you should try it!!!!!
  3. [R17] Calculator 5/5 · US Review: It is so good to calculate and it can change themes
  4. [R21] Calculator 3/5 · US Ads: Ok people do not for the life of you download this app. Why are there ADS, also no backspace button
  5. [R2] Calculator 5/5 · US Calc: Very helpful
  6. [R5] Calculator 4/5 · US It was awesome: It was great the only problem is it was really laggy and I couldn’t figure out how to return to start another question but ether then that it was GREAT 😁I would get it
  7. [R8] Calculator 5/5 · US One more thing: It is a little confusing
  8. [R24] Calculator 3/5 · GB Buttons not big enough: The buttons are NOT big enough
  9. [R3] Calculator 3/5 · US It was ok ig?: It worked great for everything but a little to much ads.
  10. [R39] Calculator 3/5 · GB Ok: This is ok, its very basic but does the job.
  11. [R74] Calculator₊ 5/5 · US App bug: I genuinely love your product and have been using the paid version for several years, but for about a month now, an annoying bug has appeared: if the answer to a division problem is a repeating decimal, it's not displayed in the answer line. It just shows "0e0," and you have to click on the calculation history to see the actual result. Please fix this; it's inconvenient. · translated
  12. [R4] Calculator 1/5 · US Too many ads: lol it gives me an ad every time I click the c function. Useless
  13. [R6] Calculator 3/5 · US Too many Ads: Would be great minus the ads
  14. [R10] Calculator 1/5 · US TOO MANY ADS!: Deleting this app. Way too many ads pop up. And they’re deceiving!! Don’t waste your time with this app.
  15. [R73] Calculator₊ 1/5 · US I have a problem: Download and liked it so much paid for it . Got a new phone and I could no longer download and use what I already paid for.
  16. [R99] Calculator₊ 3/5 · GB BRING BACK KEYBOARD SUPPORT: FOR THE LOVE OF GOD PLEASE!!!! I AM RE-SUBMITTING THIS REVIEW as after I have waited YET ANOTHER few updates and still the keyboard support has not been reinstated. Not everyone uses their iPad solely touchscreen. I am a desk worker who uses keyboard and mouse, it used to work flawlessly and was removed? Why??? PLEAE RESPOND TO THIS REVIEW DEVELOPER! I have been using
  17. [R63] Calculator₊ 3/5 · US Don’t recommend: This calculator is not helpful because you have to pay for some stuff and there are ads VERY annoying 😤and I would have put 5 or 4 stars.
  18. [R15] Calculator 3/5 · US Too many commercials: This app started out good but all of a sudden they way too many commercials slowing me down badly otherwise it’s a good calculator,but I got another one with less interruptions.
  19. [R31] Calculator 1/5 · US Insane ads not a calculator: Each step is interrupted by an ad.
  20. [R64] Calculator₊ 1/5 · US For a Calculator?: Why would I ever pay a reoccurring subscription…even a penny…for a calculator. Get out of here with this $5.99. 🙄
  21. [R76] Calculator₊ 1/5 · US Seriously?: I accidentally tapped on something and it wants to charge me six dollars a month for a calculator? This thing does nothing that you can’t get free very easily.
  22. [R77] Calculator₊ 4/5 · US Great Calculators: This App Has Great Calculators And Features Such As That It Allows You To Upload A Math Problem Via Photo, For A Price; My Only Issue Is That That Price Is Too Much For An App That I Use On Occasion. I Already Have ChatGPT And So Do Millions Of People, So The Price For This App Is Not Worth It. If It Were, Say, $25 For A Yearly Subscription, Then Yes, Definitely Would Subscribe.
  23. [R82] Calculator₊ 1/5 · US sucks.: you will have to pay for it, just get any other calculator please.

Synthesized from 120 recent App Store reviews · updated July 2026 · View on the App Store