Sun Irradiance Meter turns your phone into a quick solar irradiance estimator. Using the device light sensor and onboard motion sensors, the app converts lux readings into W/m², applies tilt correction, smoothing, and short-term prediction to give practical, real-world irradiance estimates for outdoor conditions.

Key features:

Real-time lux → irradiance conversion (W/m²) with tilt correction.

Exponential smoothing (EMA) and short-term prediction to reduce noise.

Manual calibration: set Min/Max and luminous efficacy for improved accuracy.

Lightweight, privacy-first — no account required and data stays on your device.

Tap the main card to show an interstitial (optional) and configurable app-open ad support.

Diagnostics screen shows recent raw lux values and sensor orientation for validation.