FastCalc lite

FastCalc lite

Fast, clear, efficient

15 ratings
3 reviews
Free

Details

  • Released
  • Updated
  • April 23, 2011
  • June 26, 2026
FastCalc lite screenshot #1 for iPhone
FastCalc lite screenshot #2 for iPhone
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About

This calculator app offers a streamlined experience with large, easy-to-use keys and a permanent display of your calculations. It automatically shows results as you type, eliminating the need for an equals button.

Large, easy-to-read keys
Permanent expression display
Automatic result display
Gesture-based interface
Integrated help videos
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What's New in FastCalc lite

2.1

June 26, 2026

Minor internal optimizations.

User reviews

Its a calculator...duh

Straight forward calculator. Perfect for day to day tabulation. Unless one is not used to figuring out percentages (i.e. Tips, etc) on their own lol. In other words if you are bad with math then a simple calculator is probably not for you.

The small size of the program under a mega bite is a huge plus.

Its add free too! Whoohoo
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Quirky but it grows on you.

It took me a while to figure out it was RPN but once I got that part, all I had to do was figure out how to manipulate the operators.

If you are not RPN literate, you will be frustrated and the calculator may seem impossible to use. However RPN is really worth learning. It's so much faster for complicated chained calculations but this may not be the best platform on which to learn.

I have an HP clone on the iPhone however the keyboard is too small and I make many entry errors. The big benefit of this app is the large keys which makes it much easier for big guys with large hands.

I can't live without it now.
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Best thing since RPN

Not sure why negative stars, this is the best calculation interface since Reverse Polish Notation created by HP.

A curser and regular backspace button maybe, as the swipe a character back sometimes means Start Over.

Get used to it!

Developer apps

FAQ

What makes FastCalc lite efficient?

FastCalc lite is recognized for its efficiency due to large keys for fast input, a permanent display of the entered expression, and the automatic display of results as you type, removing the need for an equals key.

How do I use FastCalc lite?

The interface is gesture-based. Slide your finger on a key to select a side symbol, swipe left on the display to delete the last elements, or swipe across the whole display to clear the expression.

Does FastCalc lite have ads?

No, FastCalc lite does not contain advertisements. It is a completely ad-free experience for users.

What devices is FastCalc lite available on?

FastCalc lite is available for iPhone and iPad devices.

How often is FastCalc lite updated?

The latest version, 2.0.2, was last updated on January 19, 2026. While specific update frequency isn't detailed, this indicates ongoing support.

What is the age rating for FastCalc lite?

FastCalc lite has an age rating of 4+, making it suitable for a wide range of users.

Can I get help using FastCalc lite?

Yes, FastCalc lite includes integrated help videos and a user guide accessible within the app's information section (ⓘ).

What is the user rating for FastCalc lite?

FastCalc lite has a rating of 3.8 stars based on 15 user ratings.