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Last updated on: 2026-07-05
Android Apps > Photography > Exposure Assistant
Exposure Assistant icon

Exposure Assistant

4.3
Matthew Bognar
4.85
86 reviews
1,000+
Downloads
$5.99

Approximate exposure for various B&W films (and some color films) in low light.

Exposure Assistant Screenshot 1 of 5
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About Exposure Assistant

Exposure Assistant is a photography app developed by Matthew Bognar.

How many times has Exposure Assistant been downloaded?

Exposure Assistant has been downloaded 2.8 thousand times. In the last 30 days, the app was downloaded 6 times.

What is the rating of Exposure Assistant?

Exposure Assistant is rated 4.85 out of 5 stars, based on 86 ratings.

Is Exposure Assistant free?

Exposure Assistant costs $5.99 to download. The APK download size is 4.87 MB. The latest version available is 4.3. The last update was on January 20, 2026.

What are the requirements for Exposure Assistant?

Exposure Assistant requires Android 4.1+ or higher. The app has a content rating of Everyone. The app has been available on Google Play October 2013.

Description
This application approximates the length of exposure for various B&W films (and some color films) in low light situations. In low light, extra exposure is needed due to reciprocity failure (also known as the Schwarzschild effect). As such, your camera's meter is not accurate in low light. This application approximates the proper exposure time (based upon manufacturers datasheets). A timer is now included in the application.

The application warns when the user enters an exposure longer than described in manufacturer's datasheets. Although the exposure in these instances is crudely approximated by mathematical extrapolation, it is crucial that users conduct their own exposure tests in these very long exposure situations.

Current supported films:
Adox CHS 25/50/100
Adox CHS 100 II
Adox CMS 20 II
Adox Silvermax 100
Agfa APX 100/400
Bergger Pancro 400
Fomapan 100
Fomapan 200
Fomapan 400
Fuji Acros 100
Fuji Acros II 100
Fuji Provia 100F
Fuji Velvia 50
Fuji Velvia 100
Fuji Pro 160 NS
Fuji Pro 400H
Fuji Superia 200/400
Ilford Delta 100
Ilford Delta 400
Ilford Delta 3200
Ilford FP4 Plus 125
Ilford HP5 Plus 400
Ilford Ortho Plus 80
Ilford PanF Plus 50
Ilford SFX 200
Ilford XP2 Super 400
Kentmere Pan 100
Kentmere Pan 400
Kodak Ektar 100
Kodak Portra 160/400
Kodak TMAX 100
Kodak TMAX 400
Kodak Tri-X 320/400
Rollei IR 400
Rollei Ortho 25 Plus
Rollei Retro 80S
Rollei RPX 25
Rollei RPX 100
Rollei Superpan 200
Rollei RPX 400

Recent changes:
Added Harmon Phoenix II. Small tweaks and bug fixes.
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More data about Exposure Assistant

Price $5.99
Total downloads 2.8 thousand
Recent downloads 6
Rating 4.85 based on 86 ratings
Ranking Not ranked
Version 4.3
APK size 4.87 MB
Number of libraries 0
Designed for Android 4.1+
Suitable for Everyone
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Exposure Assistant compared with similar apps

Common keywords of similar apps

Ilford Rollei Films Kodak Low Application Adox Ii Fomapan Delta Rpx Approximates Situations Datasheets Chs Acros Velvia Pro Ortho Kentmere Pan Tmax Exposure Fuji Light Color

Keywords missing from this app

Film Camera Meter Calculator Metering Time App Cameras Digital Shutter Photography Filters Format Stop Shooting Professional Reciprocity Photo Iso Aperture Speed Zoom Timer Long Recent Fujifilm Mode High Perfect Features Recipes Frame Custom Pinhole Spot Photos Save Range Settings Compensation Zone Filter Exposures Distance Ev Calculate

More from Matthew Bognar

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Google Play Rating history and histogram

Downloads over time

Exposure Assistant has been downloaded 2.8 thousand times. Over the past 30 days, it has been downloaded 6 times.

Changelog of Exposure Assistant

Show changelog

Developer information for Matthew Bognar

Matthew Bognar

mattbognar@gmail.com

Website

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Comments on Exposure Assistant for Android

★★★★★ A Google User · Oct 21, 2013
Easy-to-use interface Great way to compare film exposure ratings. Would be awesome to include ektar.
★★★★★ A Google User · Apr 28, 2013
Must-have App for large format shooters! An amazing app for large format shooters who want to accurately calculate shutter speeds due to reciprocity failure. This is the only Android app I was able to find that specializes in these calculations. The developer is also open to suggestions and even added a couple of film types per my request.
★★★★★ Alfred Anheier · May 9, 2022
Very useful for long exposure on film, especially with pinhole cameras. Calculations seem to be good, have to use different films to confirm.
★★☆☆☆ Dagan Sassarini · Jul 1, 2015
Not Impressed I found this app to be inaccurate when shooting Ilford films (Delta 100, Delta 3200, HP5, Pan F Plus). There is no option to choose whether you want to adjust for just exposure time or stops, you must adjust both. So good luck basing your exposure on a particular aperture. The compensations merely follow the graphs provided by the film producer and do not seem to be tested or accurate to my standard. Film selection is few. Research and testing are better methods for dealing with reciprocity.
★☆☆☆☆ Tom Gumpel · Jul 20, 2025
Absolutely garbage. I was shocked to see that there was no trial before paying for this app, and no return option, but decided to try anyway. This is an utter waste of money. The app does not allow one to calculate time based on added filters, nor does it allow for adding fractions of time, such as 1/8...you must first calculate the decimal equivalent. Better to simply use chat gpt. Save your money and refuse to support shoddy work

Google Play Rankings for Exposure Assistant

This app is not ranked

Technologies used by Exposure Assistant

Exposure Assistant is requesting 2 permissions and is using 0 libraries.
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