Photography Timer

Long exposure, NDfilter & film

Only for iPhone

Free

iPhone

ND filter calculator and long-exposure timer, with film reciprocity failure correction for film photography. Photography Timer is a practical timer for long-exposure photography. It helps you calculate how much longer your exposure becomes when using ND filters, and also check reciprocity failure correction times when shooting long exposures on film. Key features: • Long-exposure photography timer • ND filter exposure time calculation • Film reciprocity failure correction • Multi-camera timers • Start timers from calculated times or custom target times • Check active and completed timers during a shoot • 34 film presets supported: ILFORD/HARMAN, Kodak, Fujifilm, FOMA BOHEMIA, Rollei, ADOX • Custom film profiles for saving your own correction data Film data note: based on official manufacturer materials, technical documents, product PDFs, support pages, and other reviewable sources. Photography Timer is made to reduce exposure calculation work in the field, so you can focus on the actual shooting time. I built this app because I needed it for my own photography. It started from my workflow with tripods, ND filters, film cameras, and long exposure times. If your photography workflow is different, I would be happy to hear what would make the app more useful.

Ratings & Reviews

  • 5.0
    out of 5
    1 Ratings

Photography Timer 0.8.0 • Stack up to four standard filters for exposure calculations. • Added accurate fractional-stop support for ND100, ND200, and ND100k filters. • Improved the reliability of saved data, timer restoration, and overall app behavior.

Version 0.8.0

The developer, SangWook Han, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Collected

    The developer does not collect any data from this app.

    Privacy practices may vary, for example, based on the features you use or your age. Learn More

    Accessibility

    The developer has not yet indicated which accessibility features this app supports. Learn More

    Information

    Seller
    • SangWook Han
    Size
    • 6.2 MB
    Category
    • Photo & Video
    Compatibility
    Requires iOS 17.0 or later.
    • iPhone
      Requires iOS 17.0 or later.
    Languages
    • English and Korean
    Age Rating
    4+
    Copyright
    • © 2026 SangWook Han
  • Developer Website
  • Privacy Policy