# Uno Calculator

> Versatile calculator for arithmetic and unit conversions. (iPhone/iPad app by Uno Platform Inc..)

- Source: https://appshunter.io/ios/app/uno-calculator/id1464736591 (this page in markdown: same URL + `.md`)
- Developer: [Uno Platform Inc.](https://appshunter.io/developer/1617866832)
- Category: Productivity
- Price: Free
- Rating: 4.62/5 from 113 App Store ratings · 89 written reviews indexed
- Age rating: 4+
- Requires: iOS 14.2 · 96 MB
- Languages: Afrikaans, Albanian, Amharic, Arabic, Azerbaijani, Basque, Belarusian, Bangla, Bulgarian, Khmer and 50 more
- Released: 2019-06-28
- Data updated: 2026-08-06
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/uno-calculator/id1464736591/reviews.md

## What is Uno Calculator?

The powerful Uno Calculator receives a makeover from Uno Platform with a wide variety of features. From calculations to measurements of size, temperature, speed, energy, currency and more, the calculator is a powerful one-stop-shop for all calculation-related needs.

## Key features

- Arithmetic calculations
- Unit conversions
- Size measurements
- Temperature conversions
- Speed calculations
- Energy calculations
- Currency exchange

## What do users think of Uno Calculator?

Overall sentiment: positive

**Pros**

- 💰 Completely free with no ads or in-app purchases
- 🎨 Clean, minimalist, and intuitive user interface
- 🔧 Multiple calculator modes (standard, scientific, programmer)
- 📊 Useful unit conversion features
- 📜 Helpful history and memory panes for tracking calculations
- ⚡ Fast and responsive performance on iPhone
- 🪟 Based on open-source Microsoft Windows Calculator
- 📱 Works seamlessly with iPad split-view and slide-over
- 🌓 Dark mode support available
- 🔄 Smooth handoff between Apple devices

**Cons**

- ⌨️ No keyboard input support on Mac or iPad (major recurring complaint)
- 📍 Calculator buttons positioned on left side (inconvenient for right-handed users)
- 📜 History pane cannot be hidden or minimized
- ⏱️ Slower app launch time compared to stock calculator
- 🐢 Laggy performance on macOS with slow button responsiveness
- 📋 No copy and paste functionality
- 🎯 Buttons disappear or become invisible on iPad with Apple Pencil
- 🔤 Text visibility issues on larger iPad screens in iOS 16
- 🌙 Dark mode appearance could be improved visually

**Commonly reported bugs**

- Standard calculator mode doesn't follow order of operations (1+2*3 = 9 instead of 7)
- Buttons disappear while using on iPad
- Apple Pencil input causes buttons to blend into background
- Slow key responsiveness on macOS
- Numeric keypad input not recognized from Apple keyboard
- History not persisting after app closure
- Text rendering issues on larger iPad displays
- Unit conversion errors (volume translated incorrectly in Chinese)
- Slow data entry on macOS Catalina
- Landscape mode layout issues

**Most requested features**

- Keyboard input support for Mac and iPad (most requested)
- Copy and paste functionality for results and formulas
- Option to reposition calculator buttons to right side
- Ability to hide or collapse history pane
- Persistent history that saves after app closes
- Sound/click feedback option in settings
- Donation option within the app
- Improved dark mode styling
- Bluetooth keyboard support
- Numeric keypad support for external keyboards
- Currency conversion feature restoration

## Recent user reviews (10 of 89)

All indexed reviews: https://appshunter.io/ios/app/uno-calculator/id1464736591/reviews.md

### 5/5 — Great UX! Free! No ads!

*2026-02-01, version 1.2.10*

My first ever and it’s for a Calculator. I never liked the stock Apple Calculator app. Just looking for one better, but didn’t want to pay for it and I found the Uno Calculator. It’s two face is creep and is easier to use, as the buttons are bigger and easier to press, especially on the iPhone. I was surprised to see only 110 comments but I guess a calculator is not something most people go looking for unless they need a scientific calculator or one more complex then a straightforward calculator. Speaking of which, this Calculator has all of them. And they’re free.

### 4/5 — 1+2*3

*2026-01-23, version 1.2.10*

Hi the developer, I like this app and I have uesd it for several years. However, there is an issue I'm confused, when I input like 1+2*3, I think the answer should be 7, but this Calc gives 9. Could you adjust this calculate logic？

### 5/5 — LuvIt! Keyboard Input is Enabled/MacOS 26

*2026-01-07, version 1.2.10*

I really like this very efficient app on iPhone & iPad and had a difficult time finding the Mac app today, but finally located it. Yay! So apparently, at some point in time, keyboard input has been added. It seems to be a primary complaint in reviews I read and am pretty pleased that’s no longer an issue. I would have still used Uno, but prefer keyboard input for more complicated situations.

For me, I really like & use the history & memory panes, but if those are a deal breaker, from what I’ve seen, they can’t be hidden, yet! 

I haven’t experimented with speech or dictation yet and notice there are other customizations I might try out, like font & color. Handoff is smooth between devices.

Thanks to the developers for making a fantastic multi-platform, basic calculator that just happens to be free. Much appreciated!

### 4/5 — history

*2025-08-26, version 1.2.10*

please don't delete history when i close the app.

### 5/5 — Fantastic

*2025-08-16, version 1.2.10*

Great calculator app hoping it continues to receive support and updates. My only complaint is it takes a bit longer to open than the official calculator app.

### 5/5 — A better calculator app

*2025-07-01, version 1.2.10*

This is a great calculator app - with many modes that you can switch between and loads of unit conversions. Based on the same underlying code as the Microsoft Windows Calculator app that was open sourced.

### 5/5 — History Pane

*2025-01-15, version 1.2.10*

I really like this app! The only thing, is I wish I could hide the history pane. No option to do so, and I can only drag & resize the window so small before it stops resizing, leaving the history pane there still. I thought I could hide it by dragging the side of the window to the left. The app on my MacBook looks just like the app on my iPhone if my iPhone is in landscape mode (shows history). When I turn my phone to portrait mode, it hides the history. How it looks on my iPhone in portrait mode is how I’d like to see it on my MacBook. Hoping this can be an easy fix for the developer. Thanx!

### 3/5 — Best of the best, But!!!

*2024-12-27, version 1.2.10*

Buttons disappear, while you using it on iPad.

### 1/5 — The worst scientific calculator yet

*2024-10-29, version 1.2.10*

One of the worst scientific calculators you can get. There’s no way to delete part of an equation and you can barely see what you’re even typing.

### 5/5 — And still is the best calculator

*2024-10-04, version 1.2.10*

No ads, no in-app purchases, just pure amazingness.

No calculator on iOS comes even close to this one. And now with iOS 18, I now have it on my control centre so that's nice.

## Frequently asked questions about Uno Calculator

### What does the Uno Calculator app do?

The Uno Calculator app provides a wide range of calculation functionalities. It handles basic arithmetic operations and also offers conversions for various units of measurement, including size, temperature, speed, energy, and currency.

### What are the key features of Uno Calculator?

Key features include performing arithmetic calculations, converting units of size, temperature, speed, energy, and currency. It aims to be a one-stop shop for all calculation-related needs.

### Is Uno Calculator free to use?

Yes, the application is available for free. There are no advertisements or in-app purchases mentioned, suggesting a completely free user experience.

### What kind of calculations can I perform with Uno Calculator?

You can perform standard arithmetic calculations. Additionally, the app specializes in unit conversions for physical quantities like size, temperature, speed, and energy, as well as financial conversions for currency.

## Version history (last 5 releases)

### 1.2.10 — 2024-01-31

Performance and stability fixes

### 1.2.9 — 2023-09-12

Fixed Chinese translations

### 1.2.8 — 2023-09-10

- New currency conversion support
- Current state is now restored on app restart
- Fixed conversions failure in some cultures

### 1.2.7 — 2023-09-03

Fix potential app startup crash

### 1.2.6 — 2023-09-02

Bug fixes and performance

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## More apps by Uno Platform Inc.

- [Uno Gallery](https://appshunter.io/ios/app/uno-gallery/id1380984680)
- [UADO](https://appshunter.io/ios/app/uado/id1472198775)
- [Ch9](https://appshunter.io/ios/app/ch9/id1512235875)

All apps by Uno Platform Inc.: https://appshunter.io/developer/1617866832

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-06.*