Photone - Grow Light Meter
Photone - Grow Light Meter Summary
Photone - Grow Light Meter is a with in-app purchases iOS app in Tools by Lightray Innovation GmbH. Released in Apr 2019 (6 years ago). It has 10.4K ratings with a 4.64★ (excellent) average. Based on AppGoblin estimates, it reaches roughly 41.1K monthly active users and generates around $<10K monthly revenue (100% IAP / 0% ads). Store metadata: updated Jan 26, 2026, version 2.
Recent activity: 4.00 new ratings this week View trends →
Data tracking: SDKs and third-party integrations were last analyzed on Nov 14, 2025.
Store info: Last updated on App Store on Jan 26, 2026 (version 2).
Photone - Grow Light Meter was last scanned for SDKs 2025-11-14. Below is the overview of third party companies detected in the app. The full list of raw SDKs, app permissions and unknown SDKs is available here.
Mixpanel
Firebase
Google
Starscream
nanopb4.64★
Ratings: 10.4K
Screenshots
App Description
Take the guesswork out of plant lighting with Photone, the most accurate plant light meter app. Measure PAR, PPFD, DLI, lux, foot-candles, and color temperature (kelvin) directly with your phone or tablet.
To measure light with research-grade accuracy, Photone uses the most precise sensor in your device: the camera. Its unique measurement algorithm works directly with the RAW camera sensor data to capture true light intensity. This allows Photone to rival professional handheld PAR meters in accuracy and go even further by helping you interpret the numbers with in-app guides, tools, and additional features.
MEASUREMENTS
⎷ Photosynthetically Active Radiation (PAR) as PPFD in µmol/m²/s
⎷ Daily Light Integral (DLI) in mol/m²/d
⎷ Illuminance in lux or foot-candles
⎷ Light color temperature in kelvin *
⎷ Extended PAR (ePAR) including far-red light (ePPFD, eDLI) *
FEATURES
⎷ Industry-leading accuracy, comparable to professional PAR quantum sensors
⎷ Pre-calibrated for your specific device
⎷ No ads
⎷ In-app guides
⎷ Light source selection for every type of grow light (LED, HPS, CMH, etc.) *
⎷ Average and peak readings *
⎷ Plant light calculator
⎷ Hands-free “read aloud” function *
⎷ Special underwater measurement mode *
⎷ Custom calibration option to align readings to another meter
⎷ Premium support for advanced grow questions *
* These features require an in-app purchase to fully unlock
DIFFUSER REQUIRED
Like every real light meter, Photone requires a diffuser to measure accurately. A diffuser scatters incoming light evenly on the sensor and prevents hotspots. While it may sound complex, the solution is surprisingly easy. You have two options:
1) Easily build a diffuser yourself in less than a minute using standard printer paper. This is accurate enough for most use cases.
2) Get the dedicated Diffuser Accessory (free worldwide shipping) for best accuracy and convenience. More details on https://lightray.io/diffuser/.
(!) Do not rely on apps that do not require a diffuser. They are inaccurate because they ignore the basic physics of light measurement.
UPGRADE OPTIONS
Photone is free to download and use with all basic features without any ads or hidden costs. To unleash its full potential, Photone offers two types of upgrades:
→ Lifetime unlocks — one-time purchase, always restorable via your Apple Account
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