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Calculator·

Calculator·

Big Basic Calculator

34K ratings
887 reviews
With Ads
🔧 Utilities
📊 Productivity
Free
In-App PurchasesWith Ads

Details

Released
August 31, 2012
Updated
September 25, 2026

Features

Developer

Tim O's Studios, LLC
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iphone
ipad
watch
🧾$1.99
In-App Purchase↘︎
📌Ready
Reviews summary↘︎
⭐887
Reviews↘︎
📝40+ tags
Tags↘︎
🔄6+ apps
Alternatives↘︎
❓5 answered
FAQ↘︎
📦~ in 2 months
Updates frequency↘︎
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About

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.

✓Basic arithmetic operations
✓Percentage calculations
✓Multiple color schemes
✓Copy results
✓Square, square root, inverse functions
✓iPad Split View support
✓Apple Watch support
Show original description

What users say about Calculator·

Reviews of Calculator· are mostly positive: the Utilities app is rated 4.9/5 from 34K App Store ratings. What users like most: simple and easy to use, quick and responsive. Top complaints: frequent ads can be distracting, occasional crashes or freezes. Summarized from real user reviews.

Positive things

  • 👍Simple and easy to use
  • 🚀Quick and responsive
  • 💡Percentage function works well
  • 👍Large, clear buttons
  • 👍Straightforward, no-frills design

Negative things

  • 🔋Frequent ads can be distracting
  • 🐛Occasional crashes or freezes
  • 🔒Lack of customization options
  • 💡No backspace/undo function
  • 💡Missing advanced features like memory
See all reviews

What's New in Calculator·

5.4

September 25, 2026

Minor improvements

3

Subscriptions & In-App Purchases

Upgrade App

Remove ads and unlock all colors.

$0.991 Month
3 Days trial
How to cancel Calculator· subscription ⁉️

User reviews

Most RecentHighest RatedLowest Rated

Big basic calculator

Exactly what I was looking for
119806bmc

Optional

Optional
𝟺𝟺𝟼

Needs some button rearrangement

The location of the = and the +/- should buttons should be switched to conform to the standard of other online calculators. The current placement causes many user errors and the need to start over.
PPeginvt

Moites

Je ne suis pas contre mais il faut des changement
L8La star du 83

Terrific

Easy, simple, no ads, just get it quick and easy. Thanks for not making it complicated
SSherwoodWV
See 882 more reviews

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User experience

🐞

Reported Bugs

3 issues

Crashes when performing long calculations

Bug

Freezes when opening the app

Bug

Incorrect results for some complex calculations

Bug
✨

Requested Features

4 requests

Add a backspace/undo button

Feature

Implement a history/memory feature

Feature

Provide more customization options

Feature

Reduce frequency of ads

Feature

FAQ

What are the main functions of this calculator app?

This app provides essential functions like addition, subtraction, multiplication, division, and percentage calculations. It also includes advanced features such as square, square root, and inverse functions, particularly on iPad in landscape mode. Users can easily copy their results by double-tapping them.

Is this calculator app free to use?

The app offers a free version with core functionalities. However, it also provides auto-renewable subscriptions for 'Premium Access' with one-month and one-year durations. A free trial period may be offered, but any unused portion is forfeited upon purchasing a subscription.

What devices is this calculator app compatible with?

This app is designed for iOS devices, including iPhones and iPads. It offers specific features like Split View support for multitasking on iPads and Apple Watch support for convenient calculations on your wrist.

How can I manage or cancel my subscription?

You can manage your subscriptions and turn off auto-renewal from your Account Settings in iTunes after purchase. Instructions for changing or canceling your subscription are also available on the developer's website.

Can I customize the appearance of the calculator?

Yes, the app offers multiple color schemes, allowing you to personalize the look of the calculator to your preference. This helps in making the interface more visually appealing and tailored to your needs.