The Cinematography Electronics FLICKERfree Calculator is a handy tool to calculate the proper camera speed and shutter angle combinations for FLICKERfree film or digital cinematography. It is especially useful when using HMI or fluorescent lighting.

Our FLICKERfree Calculator is designed with the same simplicity as our popular HMI Flickerfree Filming Speeds reference cards. Our App calculates the camera speed in Frames Per Second (fps) and camera Shutter Angle in Degrees. The colors on the calculator, Burgundy (50 Hz) or Blue (60 Hz), also match the colors on our reference cards.


* Easy to use with an attractive interface.
* Selectable Line Frequency, either 50 Hz or 60 Hz.
* Calculates the camera speed in Frames Per Second (fps).
* Calculates the camera Shutter Angle in Degrees.
* Calculates instantly when an entry is changed.
* A finger slider allows user to select the Frames Per Second or Shutter Angle values.
* Images of our HMI Flickerfree Filming Speeds reference cards are included.
* Optimized for the iPhone 4 Retina screen.

HMI Flickerfree Filming Speeds reference cards
© 1986 - 2013 Cinematography Electronics Inc.

What’s New

Version 2.0.0

Updated for iOS 11.0

Ratings and Reviews

4.7 out of 5
6 Ratings

6 Ratings

Lauren2665 ,


This app is quite nifty. Very accurate. My photos have all turned out great after using this apps calculations!

Chris09406 ,

Great app!

I'm glad to see this in an app! I used to wait till the trade show to get their cards. Now, no more!

Max Polakow ,

Best App around!!

By far the best App for job! Perhaps the best App in the world...


Thomas Barton
2.2 MB

Requires iOS 11.0 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating


  • Family Sharing

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

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