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Manage your film photography from start to finish! One app does it all - notes, filters, exposure calculations, custom films, zone system editor, film holder management as well as reciprocity math!
A comprehensive film reciprocity calculator for photographers. Select a film type and metered exposure time - the calculator will provide a reciprocity compensated exposure time. The app includes an exposure timer so you can time your long exposures. You can also use a slider to adjust exposure when you have filters attached.
The app supports a wide range of film stocks and allows the user to add various common exposure filters such as NDs and Polarizers.
Keep detailed notes and share them. Share your adjusted exposure times with colleagues.
This app makes film photography a breeze.

The app includes in-app purchase to unlock pro features including a note-keeping feature, the ability to add custom films and the ability to select often used film stock as favorites.

You may need to setup Reciprocity Timer in Settings -> Notification Center to ensure the app's timer can notify you when exposures are ending and your device is asleep.

What’s New

Version 3.12

Loads of bug fixes and stability fixes.
Added ability to turn Film Holder numbers on and off.

Ratings and Reviews

2.5 out of 5
15 Ratings

15 Ratings

Larry-710 ,

Film Holder Glitchy

App closes when choosing a custom film holder with Pro version. Reinstalled app and still doesn’t work. I tried contacting developer, but I don’t Facebook. Otherwise, app is very helpful.

atstockland ,

100% inaccurate

Awesome idea but is totally wrong. Being able to compound multiple filters, bellows, compensation and reciprocity is fantastic. Except the reciprocity calculations for FP4+ is totally wrong. Even simple calculations do not match up with published data. I tried to contact the developer with an example discrepancy and questions and they never responded. I won’t continue using the app because I can’t rely on it.

DBM4891 ,

Great app, handy for 4x5 shooters

Not enough credit is given for this app. This app is incredibly handy for calculating bellows compensation and reciprocity. Yes, this app could use more films in the database, but as a 4x5 shooter, all of the emulsions I need are listed.


Pump Interactive
29.5 MB

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



Age Rating
In-App Purchases
  1. Reciprocity Timer Pro $9.99


  • Family Sharing

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

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