# Calculator´ — Basic - Advanced - Scientific

> Intelligent scientific calculator with live results, history, and customization. (iPhone/iPad app by Oval Software Oy.)

- Source: https://appshunter.io/ios/app/calculator/id878851717 (this page in markdown: same URL + `.md`)
- Developer: [Oval Software Oy](https://appshunter.io/developer/1438258178)
- Category: Productivity, Utilities
- Price: Free with in-app purchases
- Rating: 4.60/5 from 465 App Store ratings · 99 written reviews indexed
- Age rating: 4+
- Requires: iOS 14.0 · 13 MB
- Languages: Russian, Welsh, German (Germany), Italian, Czech, Slovak, French (France), Thai, Chinese (Simplified, China), American English and 2 more
- Released: 2014-09-05
- Data updated: 2026-08-27
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/calculator/id878851717/reviews.md

## What is Calculator´?

Stop your math time-wasting today with this app! Designed to help you zip through your daily math in a swift of your own unique style ;-)

* LOVED by thousands for its smart UI with Live results & Natural feel

Now featuring user-definable advanced Functions that you can Share easily with other Calculator users and optimizations with iPad multitasking, 3D Touch shortcuts, Expandable Widget, Spotlight searching of History + watchOS native App with haptic.

Calculator is super intelligent, multi-functional scientific calculator that makes doing math look like art. It has built-in on-screen timer, notif. center Widget, Custom Keyboard, many pre-set functions like Date-time and Base computations and limitless combination of colors, fonts, shapes and sizes.

It features standard basic & scientific calculator functions, history log, and an elegant user interface. The quick timer is designed to help your track remaining mins:secs whenever you are on schedule.

It is really clever.
It can do live math expressions: from the simplest like "1+2" to more advanced expressions like "3+(3x9(80+sin(90)))"

Advanced calculator. 
By swiping left and right on the app, you can easily access over 50+ advanced math functions. 

History log.
Calculator remembers what you have calculated. Swipe up, and you can see all your previous calculations.

Colorful Themes.
Limitless lovely themes for you to browse, including optional parallax background image of your choice!

Easy access. 
Tap & Hold a math expression to edit it. Shake your device to undo 
Tap & Hold a number key for smart parenthesis 
Tap & Hold the decimal point for RANDOM decimal 
Tap & Hold the “ans” key for answer history 
Tap & Hold the “÷” key for 1/x 
Tap & Hold the “-” key to negate 

Text style Edit option for Expressions 
Tapping sound options 

An In-App purchase is ready if you decide to add the Converter and Basic Graphing!

Terms of Service & Privacy Policy: https://oval.fi/privacy-calculator

Subscription Terms

The subscription auto-renews at the end of each term.
Payment will be charged to iTunes Account at confirmation of purchase.
The subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period.
Account will be charged for renewal within 24-hours prior to the end of the current period.
You may manage your subscription and turn off auto-renewal by going to your Account Settings after purchase.
Any unused portion of a free trial period will be forfeited if you purchase a subscription.
Instructions on how to cancel a subscription can be found at the following link: https://support.apple.com/en-us/HT202039.

## Key features

- Live results and natural feel UI
- User-definable advanced functions
- History log with easy access
- Customizable themes and colors
- On-screen timer
- iPad multitasking and Spotlight search

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Standard features w/ Free Week | $0.49 | per year |
| Complete feature-set | $3.99 | per year |
| Standard features w/ Free Year | $0.49 | per year |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Converter + Graphing | $3.99 | one-time |


## What do users think of Calculator´?

Overall sentiment: mixed

**Pros**

- 👍 Clean and intuitive user interface
- 🚀 Fast and efficient performance
- 📊 Shows calculation progression like paper tape
- 🎨 Customizable appearance and themes
- 📱 Works well as iPhone/iPad replacement for default calculator
- ⌨️ Good button size and sensitivity
- 📜 Date-controlled history feature
- 🔧 Advanced features and expression editor
- 🎯 Widget availability
- 💾 Small app size

**Cons**

- 💰 Switched to subscription model from free/one-time purchase
- 😤 Bait-and-switch pricing strategy
- 🔐 Paywall on basic features like clear button
- 📺 Ads and pop-ups introduced
- ⚠️ Removed features after update
- 🐛 Performance issues on newer devices (iPhone 13 Pro Max)
- ❌ Restore old purchase not working
- 🎯 Confusing pricing tiers and options
- 😞 Poor customer service response

**Commonly reported bugs**

- Buttons below numbers 1, 2, 3 not responding
- App crashes when screen fills with numbers
- Numbers deleted backwards after full screen
- Swipe down converter doesn't work properly on iPad
- Pressing equals multiple times adds duplicate results
- App becomes unresponsive and requires restart

**Most requested features**

- Haptic feedback support
- Fraction calculation support
- RPN mode
- iCloud sync for history
- Automatic parentheses
- Simple keyboard-only option
- Better converter UI (swipe functionality)

## Recent user reviews (10 of 99)

All indexed reviews: https://appshunter.io/ios/app/calculator/id878851717/reviews.md

### 5/5 — Math

*2026-04-18, version 3.6.3*

Good

### 5/5 — Great calculator

*2025-02-24, version 3.6.3*

A really well made Calculator app that replace the default calculator app on both my iPhone and iPad. Many convenient features, clean UI. Can’t recall any crash in the years I have been using it.

### 5/5 — Indispensable

*2023-10-12*

Super application, très utile et indispensable.

### 5/5 — Works well for me

*2021-12-11*

👌🏾a-0k

### 3/5 — Sluggish with iPhone 13 pro max

*2021-12-01, version 3.5.39*

I used this app with iPhone 10 and it was my favourite calculator app but since upgrade to iPhone 13 pro Max, the app not been working the way it should be. I would not use it till it gets upgrade and will not renew my subscription. After the screen get full with number it starts deleting the number backwords. 

Please resolve the bug

### 1/5 — 别更新

*2021-05-03*

差评，一更新，以前的功能都用不了，查看历史记录都得收费，想钱想疯了？

**Developer response:** 是的，我们太疯狂了，这就是为什么我们每年收取最低（0.15日元）的维护费用-您知道免费的免费😉

### 5/5 — 要充值也要让啊  转圈圈是什么意思，，

*2021-02-07*

弹要充值却转圈圈  一直这样😭

### 2/5 — 为什么在界面一滑动就跳出来充值界面？

*2021-02-03*

还不能取消，这是什么设计？

**Developer response:** 所有基本功能和一些独特功能都是免费的。

### 1/5 — 不值得

*2020-11-23*

强行收费了. 
我只需要基本的计算功能 
每次弹窗让买完整版

**Developer response:** 所有基本功能都是免费的。 一些高级功能也是免费的。 弹出窗口可能是意外滑动手势以显示历史记录的结果吗？

### 1/5 — Require more money again

*2020-10-29, version 3.5.35*

I brought it and now it requires more money after update.

## Frequently asked questions about Calculator´

### What does this calculator app do?

This app is an intelligent, multi-functional scientific calculator designed to help users with daily math tasks. It offers basic, advanced, and scientific functions, a history log, live results, and customizable themes. It also includes features like an on-screen timer and support for iPad multitasking.

### What are the key features of this calculator?

Key features include a smart UI with live results, user-definable advanced functions that can be shared, a history log, customizable themes with parallax backgrounds, an on-screen timer, and easy access to functions through gestures and shortcuts. It also supports iPad multitasking and Spotlight searching.

### How much does this calculator app cost?

The app is free to download and use with its core calculator functions. However, there is an in-app purchase available to add a Converter and Basic Graphing functionality. The app also offers a subscription model for advanced features.

### Is this calculator app compatible with my device?

The app is designed for mobile devices and specifically mentions optimizations for iPad multitasking, 3D Touch shortcuts, and a watchOS native app with haptic feedback. It is likely compatible with a wide range of iOS devices.

### What are some common use cases for this calculator app?

This app is useful for students performing complex calculations for homework or exams, professionals needing quick and accurate calculations for work, and everyday users who want a more powerful and customizable alternative to a basic calculator. The timer feature can also be useful for time management.

## Version history (last 5 releases)

### 3.6.3 — 2024-04-01

Bug fixes & improvements

### 3.6.2 — 2024-03-22

Bug fixes & improvements

### 3.6.1 — 2024-03-19

Bug fixes & improvements

### 3.6 — 2024-02-13

Bug fixes & improvements

### 3.5.56 — 2024-01-25

Minor adjustments.

## Apps similar to Calculator´

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| --- | --- | --- | --- |
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| [Fraction Calculator Plus #1](https://appshunter.io/ios/app/fraction-calculator-plus-1/id580778301) | 4.9 (22,168) | Free | Productivity |
| [OneCalc+ All-in-one Calculator](https://appshunter.io/ios/app/onecalc-plus-all-in-one-calculator/id1324977953) | 4.7 (512) | $3.99 | Productivity |
| [Fraction Calculator PRO #1](https://appshunter.io/ios/app/fraction-calculator-pro-1/id504494723) | 4.9 (751) | $3.99 | Productivity |

## More apps by Oval Software Oy

- [Five in a row - Pentaballs](https://appshunter.io/ios/app/five-in-a-row-pentaballs/id462936390)
- [Time Calculator - Work Hours](https://appshunter.io/ios/app/time-calculator-work-hours/id565039079)
- [Knight Squares](https://appshunter.io/ios/app/knight-squares/id878126671)
- [Weather Compare - Cold Day](https://appshunter.io/ios/app/weather-compare-cold-day/id911912902)
- [Tap to Zap - Bubble Trouble](https://appshunter.io/ios/app/tap-to-zap-bubble-trouble/id942464451)

All apps by Oval Software Oy: https://appshunter.io/developer/1438258178

## Related topics

[customizable calculator](https://appshunter.io/ios/topics/customizable-calculator)

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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 2026-08-27.*