Candela: Light Meter & Log
Spot exposure for film photos
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
Candela is a light meter for people who shoot film. Point your phone at the scene and read a live exposure - average the whole frame or tap to spot meter - then lock the reading and walk aperture, shutter and ISO around the triangle in full, half or third stops. The needle moves the moment the light does, and when the light is out of range, Candela says so instead of guessing.
It is honest about what a phone can do. The camera gives an estimate, not a lab instrument, so there is a calibration dial: shoot one frame against a meter or a camera you trust, nudge Candela up to two stops in third-stop steps, and it remembers. A sunny day is your free reference - if the reading disagrees with sunny 16, you know which one to fix. No camera permission yet? A demo scene lets you learn the dials first.
The meter is free forever. One purchase adds the film shot log and reciprocity correction - no subscription, yours for good.
The shot log keeps your rolls the way you actually shoot them. Load a roll, pick the stock and box speed, note the camera, and log each frame with the exposure you used and a line about the scene. When the developed film comes back, every dense or thin negative has its story next to it - frame by frame, roll by roll. Close a finished roll, keep notes while it waits at the lab, export everything as a file you own.
Reciprocity is built in, not rented. Meter a long exposure at dusk and Candela corrects it for your film stock - factors for HP5 Plus, Delta 100 and 400, FP4 Plus, Pan F Plus, SFX, XP2 Super, Ortho Plus, Kentmere and Delta 3200 are included, and any other stock takes a custom factor from its datasheet. The corrected time sits right on the dial, and the log records both what you metered and what you shot.
Candela suits a Trip 35 with a dead selenium cell, a Hasselblad that never had a meter, pinhole afternoons and slow film at dusk. One honest meter, one log, one price.
Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy Policy: https://cooperative-catmint-496.notion.site/Candela-Privacy-Policy-3a6d692d254d8046b0ecd4b76c3e1b21
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Small fixes and improvements.
The developer, Petr Nezval, 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.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Petr Nezval
- Size
- 2.9 MB
- Category
- Photo & Video
- Compatibility
Requires iOS 17.2 or later.
- iPhone
Requires iOS 17.2 or later. - Mac
Requires macOS 14.2 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.1 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Unlock $6.99
- Copyright
- © 2026 Petr Nezval