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Calcbot 2

Calcbot 2

Calculator and Unit Converter

11K ratings
656 reviews
💼 Business
🔧 Utilities
Free
In-App Purchases

Details

Released
July 13, 2010
Updated
October 6, 2026

Features

Developer

Tapbots
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Calcbot 2 video #1 for iPhone
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iphone
ipad
watch
🧾$1.99
In-App Purchase↘︎
📌Ready
Reviews summary↘︎
⭐656
Reviews↘︎
📝5+ tags
Tags↘︎
🔄6+ apps
Alternatives↘︎
❓5 answered
FAQ↘︎
📦~ in 1 month
Updates frequency↘︎
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About

This app offers a smart calculator with a history tape and expression view to track your calculations. It includes over 500 unit conversions and scientific functions, with an Apple Watch extension for on-the-go use.

✓History tape for saved calculations
✓Expression view for typed input
✓Over 500 unit conversions
✓Apple Watch extension
✓Scientific functions in landscape
✓Favorites for instant access
Show original description

What users say about Calcbot 2

Reviews of Calcbot 2 are mixed: the Utilities app is rated 4.7/5 from 11K App Store ratings. What users like most: flexible calculator & conversions, comprehensive history tape. Top complaints: lack of updates and support, removing free features behind paywall. Summarized from real user reviews.

Positive things

  • 💻Flexible calculator & conversions
  • 📝Comprehensive history tape
  • 🎨Customizable themes and icons
  • ⌚️Apple Watch app
  • 🔢Supports advanced calculations
  • 🧮Excellent unit conversion tool

Negative things

  • ⚠️Lack of updates and support
  • 🚫Removing free features behind paywall
  • 🐞Bugs and glitches (history tape issues, crashing)
  • 🕰️Slow loading times
  • 🤔Unintuitive interface for conversions
See all reviews

What's New in Calcbot 2

2.5.3

October 6, 2026

- Adding support for watchOS 27

1

Subscriptions & In-App Purchases

$1.99

Calcbot Pro

The Pro In-App purchase enables the following features: - Unit Conversion - Pro Theme - Custom Constants - Unlimited History Tape

More

User reviews

Most RecentHighest RatedLowest Rated

Better than the default!

Been using this calc for years and idk what I’d do without it at this point.
OOh_Goliath

Thank you for maintaining this app!

It is the best calculator on iOS/iPadOS!
JSJohnathan Q. Smith

Great app with no support

I think Tapbots might have abandoned the best calculator app out there? This app hasn’t been updated in 4 years and the Watch version just… disappeared? So weird. Would have been 5 stars back in the day, but their support seems to be a black hole as well.
Bbritboyj27

Love the app but…

This has always been my go-to calculator app but it hasn’t been updated in so long that the Apple Watch complication is outdated and dosnt even show up anymore. Would be 5 stars if they update it.
FFomoco4601

The best !

La meilleure des calculettes, et ce, depuis des années
ESEdge Solutions
See 651 more reviews

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User experience

🐞

Reported Bugs

4 issues

History tape not recording all calculations

Bug

Conversion settings not syncing to Apple Watch

Bug

App crashing on launch for some users

Bug

Blank app icons after iOS updates

Bug
✨

Requested Features

5 requests

Dark mode option

Feature

Widgets for quick access

Feature

More currency and unit conversions

Feature

Improved Apple Watch integration

Feature

Ability to edit calculations in history tape

Feature

FAQ

What does Calcbot 2 do?

Calcbot 2 is an intelligent calculator and unit converter designed for ease of use. It features a history tape to save and recall calculations, an expression view to see your input, and extensive unit conversion capabilities.

What are the key features of Calcbot 2?

Key features include a history tape, expression view, over 500 unit conversions across 22 categories with auto-updating currency rates, an Apple Watch extension, scientific functions accessible in landscape mode, and a favorites feature for quick access to results.

Is Calcbot 2 free to use?

The app is free to download and use, but certain advanced features such as the history tape and conversion capabilities require an in-app purchase to unlock.

What devices is Calcbot 2 compatible with?

The application is designed for mobile devices and also includes an extension for Apple Watch, allowing for calculations and conversions directly from your wrist.

What are some common use cases for Calcbot 2?

Common use cases include performing everyday calculations, converting units for travel or cooking, accessing scientific functions for academic or professional needs, and quickly splitting bills or calculating tips using the Apple Watch extension.