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

Version 2.4

Calcbot now features a completely new Apple Watch app that’s faster, more intuitive, and features full unit conversion support. We’ve also redesigned the conversion category icons, added a new theme, and included the option to change the color of the app icon. Now is the time to go pro and love your calculator!

Ratings and Reviews

4.7 out of 5
6.3K Ratings
6.3K Ratings
XLoFlyer ,

Limited Functionality

Used the old Convertbot since it was first released and it was, hands down, the best converter APP across all platforms. I work across multiple technical disciplines (aviation, engineering, programming and finance) and travel extensively. Calcbot is a poor substitute for Convertbot. Forget the interface, I can deal with that, but even after purchasing the Pro version of Calcbot, it only has a fraction of the conversions available in Calcbot with no way to select new units as in Convertbot.
Calcbot is but no more than average when compared to other converters and a serious disappointment to those who were used to Calcbot. I’d even be willing to pay a subscription fee if Calcbot were again made available. You guys had it nailed with Convertbot and took a giant step back with Calcbot.

unclefox ,

Became useless after a long time of flawless operation.

I’ve been using Calcbot for considerable amount of time. Purchased it before their was an option for pro. In the last year it has become painful to use. The problem is the delay when opening the app. It begins to pinwheel and freezes while it does I don’t know what. I’m usually going through quickly and when I have to wait 30 seconds about every other time I jump into the app before it’s usable, it becomes extremely frustrating. At times I just need a quick calculator, and Calcbot was my go to calculator. But it’s been such a pain and frustration that I had to leave a review. I don’t know what you guys did to a great simple and functioning app. But it’s broken, and a source of aggravation.

RockinRobin773 ,

Way better!

I like this app so much better than the one that comes installed on the phone. It keeps a history that I can search through later. I can even star/fav the ones I know I want to keep handy or notice I might need again. I can also slide to delete the ones I know I won’t be needing later. It’s great for all the functions I need everyday and so much more so I don’t have to worry when I need to do advanced calculations. I know I can do it all right from my iPhone or Pad so I don’t have to carry around a separate calculator in my bag. Yay me, now I have room for something else I might need :).


15.9 MB
Requires iOS 11.0 or later. Compatible with iPhone, iPad, and iPod touch.
English, Arabic, German, Japanese, Russian, Simplified Chinese
Age Rating
Rated 4+
© 2017 Tapbots LLC
In-App Purchases
  1. Calcbot Pro $1.99
  2. Theme Pack 2 $0.99
  3. Theme Pack 1 $0.99


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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