Comparison

Calculator Keyboard vs Math Keyboard

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Calculator Keyboard

This app turns your keyboard into a powerful calculator, allowing you to perform calculations directly within any application. Avoid switching apps and copying numbers by calculating on the go, whether you're texting, taking notes, or browsing.

Highlights
  • Calculate within any app
  • Supports Dark Mode
  • Customizable decimal points
  • Scientific calculator functions
  • Calculation history access
  • Keyboard feedback options
Read full description

Calku transforms your keyboard into a handy calculator, making quick calculations effortless without switching apps! Whether you're texting, taking notes, or browsing, you can instantly calculate within any app. Perfect for messaging, homework, or day-to-day tasks. Compatible with many apps such as • Messages, Messenger, WeChat, Line, Twitter, Telegram, Instagram, etc. • Safari • Notes • Mail • Stocks • And many more! Features : • Supports Dark Mode • Full iPadOS Compatibility • Customizable Decimal Points • Powerful Scientific Calculator • Access Your Calculation History • Keyboard Feedback (Sound & Haptic) Say goodbye to app-switching and copying-pasting—Calku makes calculations easy and seamless in any app! Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://supagarn-pa.com/Calku/privacy-policy

About

Math Keyboard

This custom keyboard simplifies typing mathematical and physics symbols, including Greek letters and superscripts/subscripts. Seamlessly input formulas into any app without needing to copy and paste from external sources. Enhance your notes, reports, and messages with ease.

Highlights
  • Superscripts/subscripts for numbers, letters, and symbols
  • Greek letters support
  • Wide variety of math symbols
  • Familiar keyboard layout
  • Quick tab switching
  • Cursor control via long-press
Features
Read full description

Struggling to type math symbols on your phone? Math Keyboard is a custom keyboard that lets you input the symbols, Greek letters, superscripts, subscripts, and more commonly used in math and physics — directly from your keyboard. No more searching the web every time just to copy a symbol. From class notes and reports to chats and memos, type math expressions smoothly in any app. 【Key Features】 Superscript / subscript for numbers, letters, and symbols Full Greek alphabet support Rich set of math symbols (basic) Custom keyboard support 【Highlights】 Same look and feel as the standard keyboard Shift key to toggle superscript / subscript (or uppercase / lowercase) Easy tab switching within the keyboard Long-press the Space key to move the cursor Add and reorder categories 【About Pro】 The free version has limited categories. Upgrade to Pro to unlock all categories, including: Standard alphabet Advanced math symbols (calculus) Arrows Logic & sets Custom keyboard You can also switch the alphabet display style between italic and regular. ※ This in-app purchase is a one-time payment. ※ To use this keyboard, you need to add it and enable "Allow Full Access" in the Settings app. (We do not collect any of your input — your privacy is fully protected.)

Screenshots

Calculator Keyboard4 screens
Math Keyboard2 screens

Verdict

The call

The clearest difference is review sentiment: Calculator Keyboard at 77% against Math Keyboard's 0%. Calculator Keyboard also leads on rating (4.7 vs 3.3) and ratings volume (493 vs 12). On price, update cadence, ads and in-app purchases there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Calculator Keyboard sells 2 in-app purchases, starting at $0.99 per month and Math Keyboard sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Calculator Keyboard holds the better App Store score, 4.7 against 3.3. That said, the two scores are not equally well evidenced: Calculator Keyboard has 493 ratings behind it against 12, so its average is the more settled of the two. Written reviews point the same way: 77% of Calculator Keyboard's written reviews are positive against 0% of Math Keyboard's.

UpkeepUpdate frequency

Calculator Keyboard ships an update every 3 weeks, Math Keyboard every 5 weeks. Both last shipped on October 24, 2026.

Scorecard4 real differences · 6 level
Calculator Keyboard versus Math Keyboard: the parameters behind the verdict, then further details
ParameterCalculator KeyboardMath Keyboard
PriceFreeFree
Rating4.7 (493 ratings) — better3.3 (12 ratings)
Positive reviews76.8% of reviews — better0.0% of reviews
Number of ratings493 — better12
Update frequencyEvery 3 weeks — betterEvery 5 weeks
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS14.0 — better26.2
Further details — not scored
Size3 MB2 MB
Age rating4+4+
DeveloperSupagarn PattananuchartYuta Nishimatsu

Customer experience

Calculator Keyboard

All ratings494 ratings
Positive93.3%
Neutral2.4%
Negative4.3%
Written reviews56 reviews
Positive76.8%
Neutral10.7%
Negative12.5%

Math Keyboard

Written reviews3 reviews
Positive0.0%
Neutral33.3%
Negative66.7%

Bugs and requests

Calculator Keyboard

Reported bugs

7 issues
  • Cannot delete the app
  • App is buggy sometimes
  • Non-standard division and multiplication symbols not recognized by other apps
  • Incorrect calculations (e.g., 3.10 / 1000 = 0)
  • App only works on Apple Mail and Notes initially
Show 2 more
  • Cannot get it to 'Add Keyboard' on specific devices/iOS versions
  • No scientific calculator available

Requested features

8 requests
  • Add thousands separator for numbers
  • Haptic feedback on key presses
  • Option to hide computation in text box
  • History button on main page
  • Option for standard multiplication and division
Show 3 more
  • Add scientific/accountant calculator
  • Add Pi, square root, etc. to calculator
  • Vibration on touch

Math Keyboard

Not enough reviews yet to summarise bugs or requests.

In-app purchases

2 purchases

Calculator Keyboard

Subscriptions1
  • Calku PRO (1 Month)$0.991 Month
One-time1
  • Calku Pro - Lifetime$5.99
1 purchases

Math Keyboard

One-time1
  • MathKeyboard Pro$5.99

Questions

Is Calculator Keyboard free?
Calculator Keyboard is free to download, with in-app purchases available.
Is Math Keyboard free?
Math Keyboard is free to download, with in-app purchases available.
Which has better reviews, Calculator Keyboard or Math Keyboard?
Calculator Keyboard is rated higher. Calculator Keyboard averages 4.7 out of 5 from 493 ratings, while Math Keyboard averages 3.3 from 12 ratings.
Do Calculator Keyboard or Math Keyboard have ads?
Neither Calculator Keyboard nor Math Keyboard shows ads.
Which is updated more often, Calculator Keyboard or Math Keyboard?
Calculator Keyboard ships an update every 3 weeks, and Math Keyboard every 5 weeks. Most recently, Calculator Keyboard was updated on October 24, 2026 and Math Keyboard on October 24, 2026.

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