Best 10 Key Calculator Apps

250+ iOS apps curated and reviewed

4.3 avg rating
20 free apps
Updated September 2026

The best 10 key calculator apps on iPhone average 4.3★ across 250+ titles — we've ranked them by what real users actually keep on their phones. Updated September 2026.

Compare top 10 Key Calculator Apps (September 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Adding Machine 10Key Univ LiteAdding Machine 10Key Univ LiteFree4.3★ (192)NoNoAug 2026
2Calculator with History +Calculator with History +Free4.7★ (25K)NoYesSep 2026
3Calculator with 10 buttonCalculator with 10 buttonFreeYesNoAug 2026
4Big Button Calculator Pro LiteBig Button Calculator Pro LiteFree4.7★ (14K)YesNoSep 2026
5Key CalculatorKey CalculatorFreeNoNoMay 2026
6OneCalc: All-in-one CalculatorOneCalc: All-in-one CalculatorFree4.6★ (5.1K)YesNoSep 2026
7Абук: електронні й аудіокнигиАбук: електронні й аудіокнигиFree4.8★ (507)YesYesSep 2026
8Rapid & Quick CalculatorRapid & Quick CalculatorFree4.8★ (1.5K)YesNoSep 2026

Top Picks for 10 Key Calculator

Adding Machine 10Key Univ Lite#1

Adding Machine 10Key Univ Lite by Richard Silverman

True 10Key Adding Machine
Editor's Choice
💰 Finance
4.3😐(192 ratings)
Free
Adding Machine 10Key Univ Lite screenshot 1
Adding Machine 10Key Univ Lite screenshot 2
Adding Machine 10Key Univ Lite screenshot 3
Adding Machine 10Key Univ Lite screenshot 4
Adding Machine 10Key Univ Lite screenshot 5
Adding Machine 10Key Univ Lite screenshot 6

This app emulates a traditional 10-key adding machine for precise calculations. It offers features like reversed operator entry, percentage calculation, and the ability to edit and save paper tape files. The iPad version includes a full-size keypad with audio feedback for enhanced accuracy.

What We Love

  • 👍 Easy to use
  • 👍 Works like a real adding machine
  • 👍 Tape feature is useful
  • 👍 Large, clear numbers
  • 👍 Good for bookkeeping
  • 👍 Free version is functional
  • 👍 Visual print out for totals
  • 👍 Big, easy-to-use keys
  • 👍 Good for small businesses
  • 👍 Can edit tape entries
  • 👍 Free and functional

Room to Improve

  • 💸 Paid version is expensive
  • 📉 Ads take up screen space on iPhone
  • 🤏 Keys are too small on lite version
  • 🗄️ Lite version has limited lines
  • 💡 Trailing zeros not displayed
  • 🤔 Clearing tape requires multiple clicks
  • 📝 Tape is too short
  • 😵 App crashes and loses data
  • 📱 Does not support split screen
  • 🚫 Begs for reviews constantly
  • ⚠️ Basic features restricted in free version
  • 💰 Upgrade is expensive
4.7😊(25K ratings)
FreeIn-App Purchases
Calculator with History + screenshot 1
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This free calculator app offers a fast, ad-free experience with a visual input and calculation history. Customize your experience with various keyboard sounds and colors, and access advanced scientific functions when needed.

What We Love

  • 🚀 Great calculator with history
  • 👍 Easy to use interface
  • 🚀 Responsive and fast
  • 🔒 No ads or subscriptions
  • 👍 Customizable sound and color options

Room to Improve

  • 🐛 History deletion issues
  • 🐛 Delayed equal button press
  • 🐛 Calculation errors with certain functions
  • 🔒 Expensive subscription model

More 10 Key Calculator apps to explore

FAQ about 10 Key Calculator

What are the best 10 key calculator apps for iPhone?
Adding Machine 10Key Univ Lite tops our 10 key calculator apps ranking as of September 2026, with a 4.3-star average from 192 App Store ratings, and it's free to download.
Yes — 20 of the top 10 key calculator apps we rank are free to download, including Adding Machine 10Key Univ Lite and Calculator with History +.
Adding Machine 10Key Univ Lite has no ads and has no in-app purchases, according to its App Store listing as of September 2026.
We track 250+ 10 key calculator apps on the iOS App Store as of September 2026, ranked by rating, recency, and analysis of real user reviews.
A 10-key adding machine is a type of calculator that uses a numeric keypad arranged like a telephone keypad, optimized for rapid data entry. It typically features reversed operator entry, meaning you enter the operator after the numbers, and allows for complex calculations like percentages.
The iPad version includes 'TypeTone', an audio feedback system that guides your finger back to the center of a key, reducing errors. Additionally, the ability to edit and review paper tape entries allows for easy correction of mistakes.