CoCalc is lightweight calculator for everyday use with some interesting features:

- Always on top
- Fade when inactive
- Customisable fade level for active/inactive state
- Show/hide with global hotkey
- Customisable decimal display amount
- Switchable basic and scientific mode
- Basic mode for everyday calculation
- Basic functions are: add, subtract, multiply, divide, etc.
- Scientific functions are: sin, cos, parenthesis, etc.
- Scientific mode are: deg, grad, rad
- Saveable and printable tape display
- NET/VAT percent keys with user defined value
- Copy/paste support
- Selectable decimal separator
- Adjustable decimal places


Developing useful and error free application is very important for us so in case you find any error please contact us at Thanks for your cooperation.

What’s New

Version 1.1

Bug fixings:

- issue typing '0' (B10707#01) fixed.
- minor visual update.

Ratings and Reviews

3.5 out of 5
6 Ratings

6 Ratings

Jus4u2 ,

Needs more features to make it truly useful

It has a ways to go. Was disappointed there is no way to add notes to line items on the ‘tape.’ This is a real must, I’d like to see an ALL CLEAR button on the calc, itself, instead of having to go up to the toolbar to get to it. A floating (adjustable) decimal point that is automatically entered would speed things up when you’re doing long strings of numbers. olor schemes and a larger or better contrast display (as mentioned by others) would be most welcome. Check out Judy’s Ten-Key for Windows on how to make the perfect calculator and you will have a 5 star rating from everyone.

blue68camaro ,

Will Not Open

When minimized to the dock CoCalc will not display when clicking on icon in dock. Have to right click, quit then reopen. Sometimes when opening after minimized it displays for a spit second then disappears. macOS version 10.3.2

Dougb4 ,

Different key strokes for different blokes

"Calculator" means different things to different people. Some need advanced scientific or mathematical operators, some need advanced financial calculations.

I have a feeling that most people have very simple needs, and want a very simple calculator interface. This one is very handy for me to call up from the dock.

Its transparent appearance and ability to remain hovering on my screen while I make simple designs (so it’s always available) make it a very good fit for what I need. It has a few scientific symbols (more than I need), so that I can use 𝝅 to figure areas and circumferences, and it has a tape to shore up my porous brain..

I don’t know what more I could ask for, and it’s only 99¢.


Bytewizard Korlatolt Felelossegu Tarsasag
699 KB

OS X 10.9 or later, 64-bit processor



Age Rating
Rated 4+
© 2014 Bytewizard Ltd.


  • Family Sharing

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

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