Develop! Film Timer

Hands-free darkroom developing

Only for iPhone

Free · Designed for iPhone. Not verified for macOS.

iPhone

Develop! is back, rebuilt for today's iPhones: a timer that keeps running when you lock your phone, all-new hands-free Voice Control, and Darkroom Mode. Free, always. Develop your film with a smile! Develop! is a flexible, elegant timer for developing film and working in the darkroom. Build your own development recipes in a few taps: as many steps as you need, each with its own agitation intervals. It's entirely up to you; you're in full control. Notable features: - Voice Control: Hands wet? Just say "NEXT" to move on to the next step. Recognition runs on your iPhone, no internet connection needed. - Keeps time in the background: Leave the app or lock your phone and the timer keeps running. You'll get a notification when a step ends and at every agitation. - Intervals: A built-in interval timer handles things like "beep after the first minute, then every 30 seconds." You'll see at a glance how long until your next inversion. - Darkroom Mode: A strict red-on-black theme for darkroom use. - Flexible: As many recipes and steps as you like, steps of up to 90 minutes, named your way, with notes for every recipe. - Easy to read: A large timer you can see across the room, styled after a classic camera body, right down to the vulcanite. - Import: Bring in recipes straight from FilmDev.org. - Share: Send a recipe as a file with Mail, Messages, AirDrop or anything else on the share sheet. No more losing track of time or forgetting to agitate every 30 seconds. Concentrate on being the best photographer and alchemist you can be, and leave the timing to Develop! Now go out there and shoot a roll of film. Good luck! 100% free. Always.

  • 4.5
    out of 5
    13 Ratings

Develop! is back, rebuilt for today's iPhones. FIXED: NO MORE CRASH WHEN MUSIC IS PLAYING If Develop! ever quit on you at the end of a task while you had music on, that's fixed. Your music, podcast or audiobook now dips under each beep and comes back, whatever app it's playing in. NEW - The timer keeps running when you leave the app or lock your phone, with a notification when a task ends and at every agitation chime. - Tasks and intervals can now be up to 90 minutes. - All-new Voice Control: faster, more accurate, and it works without an internet connection. Say NEXT, OK, BACK, CANCEL or RESTART. - A new timer look, styled after a classic camera body. - Darkroom Mode is now strictly red on black, everywhere in the app. - Share recipes as files through Mail, Messages, AirDrop and more. GOOD TO KNOW - Beeps now sound even when your phone is on silent, so you won't miss the end of a task. - Old flm.to recipe links no longer work. Ask the sender to share the recipe file instead. - With Voice Control on, your music pauses when a task ends so the app can hear you, and picks up again when the next task starts.

The developer, Todd Breslow, 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 Linked to You

    The following data may be collected but it is not linked to your identity:

    • Usage Data
    • Diagnostics

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

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

Provider
Todd Breslow
Size
7.8 MB
Category
Photo & Video
Compatibility
Requires iOS 17.0 or later.
  • iPhone
    Requires iOS 17.0 or later.
  • Mac
    Requires macOS 14.0 or later and a Mac with Apple M1 chip or later.
  • Apple Vision
    Requires visionOS 1.0 or later.
Languages
English and 5 more
  • English, French, German, Hungarian, Italian, Simplified Chinese
Age Rating
4+
Copyright
© 2026 Todd Breslow