If you already know Only One Calculator, this is the deeper bench. 248+ only one calculator apps for iPhone, all reviewed and ranked by user rating, recency, and download trend as of September 2026.
Compare top Only One Calculator Apps (September 2026)
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.
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.
This app offers a straightforward calculation experience, focusing on essential functions without unnecessary complexity. It includes basic arithmetic, percentage calculations, and advanced functions like square root. Users can customize the appearance with multiple color schemes and utilize features like result copying and split-screen multitasking on iPad.
What are the best only one calculator apps for iPhone?
Only One Calculator tops our only one calculator apps ranking as of September 2026, with a 5.0-star average from 2 App Store ratings, and it's free to download.
Are there free only one calculator apps for iPhone?
Yes — 19 of the top only one calculator apps we rank are free to download, including Only One Calculator and Calculator‰.
Does Only One Calculator have ads or in-app purchases?
Only One Calculator has no ads and has no in-app purchases, according to its App Store listing as of September 2026.
How many only one calculator apps are on the App Store?
We track 248+ only one calculator apps on the iOS App Store as of September 2026, ranked by rating, recency, and analysis of real user reviews.
What currency exchange options does Only One Calculator offer?
It supports over 160 currencies, with exchange rates that can be updated manually or automatically per hour, day, or week. You can also pin a specific currency for constant access.
How does the undo/redo feature work in Only One Calculator?
The undo and redo functions allow you to revert to previous calculation steps, storing up to 300 inputs for review and editing, preventing the need to re-enter data.