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

3.2 out of 5
6 Ratings

6 Ratings

447980981475 ,

Buggy, but if you use a large-format camera you need this

The interface is slightly idiosyncratic and the app is buggy with recent iOS versions (Dropbox export blows up) but, if you make exposures longer than a second (and if you use a large-format camera then you do), then you need this.

One nice feature to add would be to allow auto-notes even for short exposures: that would let me record details of all my exposures almost automatically.

ElliotKnott1995 ,

Needs Portra 800...

Great app with a large number of films, however would great to see Portra 800 and some of the Cinestill range please

Taft4lyf ,

Portrait 800

Why is this not included??


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, iPad Pro (9.7-inch), iPad Pro (9.7-inch) Wi‑Fi + Cellular, iPad Wi-Fi (5th generation), iPad (5th generation) Wi‑Fi + Cellular, iPad Pro (12.9-inch) (2nd generation), iPad Pro (12.9‑inch) (2nd generation) Wi‑Fi + Cellular, iPad Pro (10.5-inch), iPad Pro (10.5-inch) 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), iPad Pro (12.9-inch) Wi‑Fi + Cellular, iPad mini (5th generation), iPad mini (5th generation) Wi-Fi + Cellular, iPad Air (3rd generation), iPad Air (3rd generation) Wi-Fi + Cellular, iPod touch (6th generation) and iPod touch (7th generation).



Age Rating
Rated 4+
© Pump Interactive Pty Ltd
In-App Purchases
  1. Reciprocity Timer Pro £9.99


  • Family Sharing

    Up to six family members will be able to use this app with Family Sharing enabled.

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