Opening the iTunes Store.If iTunes doesn’t open, click the iTunes icon in your Dock or on your Windows desktop.Progress Indicator
Opening the iBooks Store.If iBooks doesn't open, click the iBooks app in your Dock.Progress Indicator

iTunes is the world's easiest way to organize and add to your digital media collection.

We are unable to find iTunes on your computer. To buy and download Reciprocity Failure Rate by Michael Andrei Trimm, get iTunes now.

Do you already have iTunes? Click I Have iTunes to open it now.

I Have iTunes Free Download
iTunes for Mac + PC

Reciprocity Failure Rate

By Michael Andrei Trimm

Open iTunes to buy and download apps.


Free until January 1st 2014!

Do you use Ilford HP5 Plus 400 film for your high end photography? If you've ever looked at the specification chart for the film's reciprocity exposure durations you'd realized that small 1-inch by 1-inch graph is pretty much useless when it comes to precision. Thankfully, this app is going to become your new best friend. Our team of highly trained photographers have reverse engineered that tiny graph for you in this app. Select your time, and press GO! It's that easy! Reciprocity Failure Rate 2.3 will create a special local timer (no internet required) that will let you know when your exposure is finished. Keep in mind, this app isn't like other timers - some of your exposures will last for days! You need an app that you can depend on for accurate results. This app is here for you.

Features of Reciprocity Failure Rate 2.3 Include:
- Easy scrolling to select measured exposure time
- Dynamic timer to every calculated exposure time
- Very very small fee per calculation (new pricing outline)
- Cheaper than exposing a print wrong
- 100 free calculations to all new customers!
- iOS 7 design with added support for the iPhone 5 and iPad Air with Retina Display

What's New in Version 2.3

Requires iOS 7 now
iOS 7 Flat UI
Fixed UUID bug
Updated server interface
iPhone 5 Support
Free 100 calculations to all existing and new customers!


iPhone Screenshot 1
iPhone Screenshot 2
iPad Screenshot 1
iPad Screenshot 2
Reciprocity Failure Rate
View in iTunes
This app is designed for both iPhone and iPad
  • USD 0.99
  • Category: Productivity
  • Updated:
  • Version: 2.3
  • Size: 3.7 MB
  • Language: English
  • Developer:

Compatibility: Requires iOS 6.1 or later. Compatible with iPhone, iPad, and iPod touch.

Customer Ratings

We have not received enough ratings to display an average for the current version of this application.