Best Only One Calculator Apps

247+ iOS apps curated and reviewed

4.4 avg rating
20 free apps
Updated November 2026

If you already know Only One Calculator, this is the deeper bench. 247+ only one calculator apps for iPhone, all reviewed and ranked by user rating, recency, and download trend as of November 2026.

Compare top Only One Calculator Apps (November 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Only One CalculatorOnly One CalculatorFree5.0★ (2)NoNoMay 2026
2Calculator‰Calculator‰Free4.9★ (410K)YesNoNov 2026
3Calculator%.Calculator%.Free4.4★ (4.2K)YesNoNov 2026
4Calculator·Calculator·Free4.9★ (34K)YesYesNov 2026
5Calculator - Free CalculatorCalculator - Free CalculatorFree4.2★ (1.4K)NoNoNov 2026
6Calculator--Calculator--Free4.7★ (916)YesNoOct 2026
7Calculator - CalcRightCalculator - CalcRightFree4.8★ (877)NoNoNov 2026
8Calculator for iPad!Calculator for iPad!Free4.7★ (61K)NoNoNov 2026

Top Picks for Only One Calculator

Only One Calculator#1

Only One Calculator by Jia Hua Huang

All-in-One Calculator
Editor's Choice
🔧 Utilities
5.0(2 ratings)
Free
Only One Calculator screenshot 1
Only One Calculator screenshot 2
Only One Calculator screenshot 3
Only One Calculator screenshot 4
Only One Calculator screenshot 5

This utility app offers instant currency exchange and unit conversions, making it ideal for travel and shopping. It features undo/redo functionality for easy editing and supports over 160 currencies with customizable update frequencies. Users can also access calculation history and customize the keyboard.

Calculator‰#2

Calculator‰ by Tim O's Studios, LLC

Default Calculator
Strong Contender
🔧 Utilities
4.9😊(410K ratings)
FreeAds
Calculator‰ screenshot 1
Calculator‰ screenshot 2

This utility app offers a clean and intuitive interface for performing calculations. It prioritizes a user-friendly design with large buttons and a clear display for quick and efficient use.

What We Love

  • 👍 Easy to use
  • 👍 Large, clear buttons
  • 👍 Accurate calculations
  • 👍 Simple, no-frills design
  • 👍 Reliable and stable
  • 👍 Helpful for visual impairments

Room to Improve

  • 🔍 Lack of advanced features
  • 💰 Ads can be intrusive
  • 🔒 Concerns about security/malware
  • 🐛 Occasional bugs and glitches
Calculator%.#3

Calculator%. by UniCom Technology

Simple, big screen and buttons
Worth Considering
🔧 Utilities
4.4😊(4.2K ratings)
FreeAds
Calculator%. screenshot 1
Calculator%. screenshot 2
Calculator%. screenshot 3
Calculator%. screenshot 4
Calculator%. screenshot 5
Calculator%. screenshot 6

This app offers a straightforward calculator with a large display and oversized buttons for easy operation. It's designed for everyday tasks, enabling users to perform fundamental arithmetic like addition, subtraction, multiplication, and division with clarity and convenience.

What We Love

  • 👍 Easy to use
  • 🚀 Convenient for large numbers
  • 💡 Helpful for solving problems

Room to Improve

  • 🐛 Occasional glitches and bugs
  • 💸 Intrusive ads
  • 🔍 Difficult to find settings/options

More Only One Calculator apps to explore

FAQ about Only One Calculator

What are the best only one calculator apps for iPhone?
Only One Calculator tops our only one calculator apps ranking as of November 2026, with a 5.0-star average from 2 App Store ratings, and it's free to download.
Yes — 20 of the top only one calculator apps we rank are free to download, including Only One Calculator and Calculator‰.
Only One Calculator has no ads and has no in-app purchases, according to its App Store listing as of November 2026.
We track 247+ only one calculator apps on the iOS App Store as of November 2026, ranked by rating, recency, and analysis of real user reviews.