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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.

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 2.0.1

- Added calcbot:// URL handler
- Fixed issues with bluetooth keyboard support
- Various other minor bug fixes


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Customer Reviews


Long time user of calc bot. It was designed really well. It was smart and intuitive. Now it erases your formulas before you're done working them out. The history is broken now. You get help messages every time you open. I used this app for electrical engineering. I can't even do a simple 20log(f) without wanting to chunk the phone across the room. Anytime you hit log the formula is done. Before you could backspace to change the last value and do quick calculations. It used to be good. Now they want to imitate droid calculator or something. I'm actually saddened by the bright colors and stupid layout. Used to swipe left for scientific functions. Now you have to turn the phone and use two hands. How can you work well always setting the pencil down? You have crushed my soul, and I gave it a fair shake. The update has been out a long time.

Don't trust Tapbots

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.

Updated interface is ugly and harder to use

This is not the app I originally bought. The updated interface is ugly and harder to use. Yet another mundane act of sabotage on iOS and its apps by out-of-touch developers who are trying to remove all the art from computing because their minds are structured like a giant spreadsheet. No wonder nobody wants to spend money on apps anymore, when iOS apps now look and feel like Web apps, and yet have less stability. Just use a free calculator app, which look and feel just like this anyway.

Calcbot — The Intelligent Calculator and Unit Converter
View In iTunes
This app is designed for both iPhone and iPad
  • Free
  • Category: Utilities
  • Updated:
  • Version: 2.0.1
  • Size: 5.4 MB
  • Language: English
  • Seller:

Compatibility: Requires iOS 8.1 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