Candela: Light Meter
Lux, EV & plant light meter
About
This utility app transforms your iPhone camera into a versatile light meter. It provides real-time readings for illuminance, exposure value, and color temperature, catering to photography, plant care, and room lighting needs. The app prioritizes user privacy with on-device processing and no data collection.
What's New in Candela
1.0
July 7, 2026
FAQ
What can Candela measure?
Candela can measure live illuminance in lux or foot-candles, exposure value (EV), and color temperature in Kelvin. It also converts measured light into PPFD and projected Daily Light Integral (DLI) for plant care.
Is Candela accurate?
Candela provides a well-calibrated estimate using your phone's camera. For incident-style readings, it's recommended to meter off a neutral gray card. Calibration to a trusted reference meter is available to improve accuracy.
Does Candela have ads?
No, Candela is ad-free. The app is designed with user privacy in mind and does not contain advertisements.
What devices does Candela support?
Candela is currently supported on iPhone devices. It was last updated on July 7, 2026, with version 1.0.
How does Candela help with plant care?
Candela converts measured light into PPFD and a projected Daily Light Integral (DLI). It helps you determine if a location is deep shade, low, medium, bright-indirect, or direct sun, with example plants for each level.
Can I save my light readings with Candela?
Yes, Candela allows you to save specific light readings as 'spots' to remember them. It also maintains a tidy history of your saved readings.
What is the age rating for Candela?
Candela has an age rating of 4+. This indicates it is suitable for users aged 4 and above.
How often is Candela updated?
Candela was released on July 7, 2026, and its latest version is 1.0, with the last update also on July 7, 2026. Future updates will depend on developer plans.
