iPhone Screenshots


A simple and effective 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 ND and Polarizers.

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 2.54

This is a maintenance release to support iPhone 7 and 8.
Bug and crash fixes. Added iOS 11 Support.
Changed timer so exposures under 2 seconds can now be recorded.
Fixed export to Dropbox.
Changed night-mode to red.

Ratings and Reviews

2.5 out of 5
8 Ratings
8 Ratings
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.

RafaKoy ,

Don't waste your time and money as I did

Film database is a joke, many missing important films like Fuji negative color films (Superia, Reala, etc). Publisher should list films so you know before paying for it if it's going to be helpful for you, and although the app is not free, there is no way to add films unless you pay an extra $9.99, a real rip-off.

odysseywoods ,

Complete Waste of Money

You could easily just use a timer and find the reciprocity data on your film box insert. All other features require you to buy the “Pro-Version.” There’s no benefits to this silly app. The worst part is it crashes constantly.


Pump Interactive
17.6 MB
Photo & Video

Requires iOS 8.0 or later. Compatible with iPhone 5s, iPhone 6, iPhone 6 Plus, iPhone 6s, iPhone 6s Plus, iPhone SE, iPhone 7, iPhone 7 Plus, iPhone 8, iPhone 8 Plus, iPhone X, iPhone XS, iPhone XS Max, iPhone XR, iPad Air, iPad Air Wi-Fi + Cellular, iPad mini 2, iPad mini 2 Wi-Fi + Cellular, iPad Air 2, iPad Air 2 Wi-Fi + Cellular, iPad mini 3, iPad mini 3 Wi-Fi + Cellular, iPad mini 4, iPad mini 4 Wi-Fi + Cellular, 12.9-inch iPad Pro, 12.9-inch iPad Pro Wi-Fi + Cellular, 9.7-inch iPad Pro, 9.7-inch iPad Pro Wi-Fi + Cellular, iPad (5th generation), iPad Wi-Fi + Cellular (5th generation), 12.9-inch iPad Pro (2nd generation), 12.9-inch iPad Pro Wi‑Fi + Cellular (2nd generation), 10.5-inch iPad Pro, 10.5-inch iPad Pro Wi‑Fi + Cellular, iPad (6th generation), iPad Wi-Fi + Cellular (6th generation), iPad Pro (11-inch), iPad Pro (11-inch) Wi-Fi + Cellular, iPad Pro (12.9-inch) (3rd generation), iPad Pro (12.9-inch) (3rd generation) Wi-Fi + Cellular, and iPod touch (6th generation).



Age Rating
Rated 4+
© Pump Interactive Pty Ltd
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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