Par Meter : PPFD Monitor

PAR Meter for Accurate Plant Lighting

PAR Meter helps growers measure PAR and PPFD light intensity using your phone’s light sensor to optimize plant growth, indoor farming, and grow light setups.

Designed for growers, hydroponics users, and indoor plant enthusiasts, the app provides fast and easy insights into the light levels plants actually use.

What You Can Measure

PAR (Photosynthetically Active Radiation)

PPFD (µmol/m²/s)

Light intensity trends

Real-time sensor readings

Saved measurements for comparison

Why PAR & PPFD Matter

Plants do not use brightness measured in lux. They use PAR and PPFD.

With PAR Meter you can:

Adjust grow light height

Optimize LED grow light setups

Avoid under-lighting or light stress

Improve plant health and yield

Ideal For

Indoor plant growers

Hydroponics systems

LED grow light setups

Home gardening

Grow tents and greenhouses

Simple & Practical

Clean and intuitive interface

Real-time readings

No external hardware required

Designed for fast decision-making

Important Note

Measurements depend on your device’s light sensor and are intended for estimation and optimization purposes only, not for laboratory-grade accuracy.

Privacy First

No account required

No personal data collected

Transparent privacy policy and term of use

Privacy Policy : https://sites.google.com/view/optigrowapp/home Term Of Use : https://sites.google.com/view/optigrowtermofuse/home

Subscriptions & In-App Purchases

PAR Meter offers optional auto-renewable subscriptions to unlock advanced features and remove ads:

Weekly subscription: $2.99

Monthly subscription: $4.99

Yearly subscription: $29.99

Subscriptions renew automatically unless canceled at least 24 hours before the end of the current period. You can manage or cancel your subscription at any time through your App Store settings.

Upgrade Your Experience

Unlock advanced tools and enjoy an ad-free experience with subscription Plans