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Calcbot — The Intelligent Calculator and Unit Converter

By Tapbots

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Calcbot is an intelligent calculator and unit converter for the rest of us. Featuring an easy-to-read history tape, expression view, intuitive conversion, and much more!

History Tape.
Every calculation you enter gets saved to the history tape. Refer to calculations later or send them right back to your current calculation.

Expression View.
Calcbot's original expression view allows you to see everything you have typed so you'll never forget what you entered or miss a typo.

Apple Watch Extension.
Perform basic calculations, conversions, calculate tips, and split bills right from your Apple Watch.

Convert any of your calculations with over 500 units across 22 different categories including auto-updating currency rates.

Fave a calculation and get instant access to its result via the Favorites Key. No more cryptic memory keys.

Scientific Functions.
Rotate your device into landscape mode to gain access to common scientific functions.

Get instant access to scientific constants like Pi, Atomic Mass, or add your own*.

Round for Currency.
Have all of your results rounded to two decimal places.

iCloud Sync.
Sync your history tape, constants, and faves across all of your Macs, iPhones, and iPads.

Sounds & Animations.
Beautiful custom animations and sound effects provide positive feedback and an enjoyable experience while performing calculations.

* In-App purchase required.

What's New in Version 2.1

What's New:

- Support for Apple Watch

Just in time for your shiny new Apple Watch! Perform basic calculations, conversions, calculate tips, and split bills right from your wrist. The same features are coming to the iPhone today view soon.


- Force press to access operators in Calculator mode and conversions in Converter mode.
- Tap on the result to delete one number at a time.
- Customize which conversion options show up from Calcbot on your iPhone.


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Apple Watch

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Customer Reviews

Finally updated!!!!!

This was one of my most favorite app, and I was wondering if they ever planned on updating it. Glad to see that convertbot and calcbot are now integrated into a single app. The makers of tweetbot makes very well polished and gorgeous looking apps with simple navigation that makes it a joy to use. I still miss the old UI on convertbot but this is nice in a more modern, clean and simplified manner. Not to mention it also works with Apple Watch!!! Can't wait to try that out once I receive my watch.

Don't Trust Tapbots

I paid full price ($1.99 each) for both Calcbot and Convertbot in 2011 because I liked the UI. Both apps were badly neglected, and finally Convertbot got dropped entirely. Of course, I moved on years ago with other, better, regularly updated apps for both purposes. Now they want to make a comeback with a "free" app with IAP's. When I saw this in the "best new apps" section, I had to laugh.
So if you want to use this calc for free, knock yourself out, but I strongly recommend against dropping a nickel on these developers. They will likely take your money and abandon you.


I cannot believe Calcbot supports the Apple Watch with this update but still does not have an iOS 8 Today widget. “Coming soon” has become this company’s M.O.

Tapbots needs to sort out its priorities.

(Also, guys, give us a new icon for Weightbot. It’s the least you could do.)

Calcbot — The Intelligent Calculator and Unit Converter
View In iTunes
This app is designed for both iPhone and iPad
Works on Apple Watch with an iPhone
  • Free
  • Category: Utilities
  • Updated:
  • Version: 2.1
  • Size: 4.6 MB
  • Apple Watch: Yes
  • Language: English
  • Seller:

Compatibility: Requires iOS 8.2 or later. Compatible with iPhone, iPad, and iPod touch. This app is optimized for iPhone 5, iPhone 6, and iPhone 6 Plus.

Customer Ratings

Current Version:
All Versions:

Top In-App Purchases

  1. Calcbot Pro$1.99
  2. Theme Pack 2$0.99
  3. Theme Pack 1$0.99