light meter lux meter
lumen meter illumination meter
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
Measure light in lux & foot-candles with your iPhone. Calibrate, track sessions, and get Pro insights for plants, photos & your desk. Try LightMeter Pro today.
Light Meter - measure illuminance in lux and foot-candles
Turn your iPhone into a handy light meter. See how bright your room, desk, or scene really is - ideal for photographers, plant parents, home offices, and anyone who cares about lighting.
Why Light Meter
• Live readings in lux or foot-candles with session min/max
• Hold to freeze the value while you move
• Calibration with profiles (indoor, outdoor, studio, custom) and a guided calibration flow
• Diffuser modes when you use paper or a professional diffuser over the sensor
• Dark, readable UI with optional lux-based background and camera overlay
LightMeter Pro
Unlock the full toolkit:
• Smart insights and a confidence indicator for steadier readings
• Auto scene labels so you instantly recognize dark, indoor, bright, or daylight-like levels
• Specialized modes - rough plant / PAR guidance, photography tips, and workspace ergonomics (not a substitute for lab equipment)
• Measurement history with charts and CSV export
• Advanced accuracy, smoothing, and richer visuals for power users
Good to know
Readings are estimates from your device’s camera and software - they’re great for comparing spaces and setups, not for certified compliance or safety-critical measurements.
Download Light Meter and see your light in numbers.
Privacy Policy: https://asarulabs.com/privacy.html
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Ratings & Reviews
The developer, Asaru Labs LTD, 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 Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Location
- Identifiers
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Location
- Identifiers
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- ASARU LABS LTD
- Size
- 15.7 MB
- Category
- Utilities
- Compatibility
Requires iOS 17.6 or later.
- iPhone
Requires iOS 17.6 or later. - iPad
Requires iPadOS 17.6 or later. - Mac
Requires macOS 14.6 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.3 or later.
- iPhone
- Languages
English and 9 more
- English, French, German, Italian, Japanese, Korean, Portuguese, Russian, Simplified Chinese, Spanish
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Monthly Plan $3.99
- Yearly Plan $19.99
- Weekly Plan $1.49
- Lifetime $29.99
- Copyright
- © 2026 Asaru Labs LTD