Luminometer 3.0

[Overview] Experience a high-precision light measurement tool that combines the soul of a classic analog meter with the convenience of modern digital features. "Analog Luminometer" turns your smartphone into a professional-grade light meter (Lux) for photography, interior design, agriculture, and workplace safety. [Key Features] • Hybrid Display: Beautifully animated analog needle alongside a high-visibility large digital readout. • Auto-Range: Smoothly transitions from 20 to 200,000 Lux, automatically selecting the best scale for your environment. • Logging & Graphing: Save measurements with a single tap. Review your data in a scrollable list or a detailed line graph with grid lines and data labels. • Physical Button Support: Use your device's volume buttons for hands-free operation (Up: Record, Down: Hold). • Self-Timer: Set a 2 to 60-second countdown for remote measurements. Automatically trigger a "Hold" or "Record" action when time is up. • Pro Calibration: Adjust result accuracy within a +/- 200% range. Includes a "Calibration Helper" that calculates the correction ratio for you based on a reference device. [Premium Mode] By watching a short video ad, you can unlock Premium Mode for 4 hours: • Remove all banner ads. • Unlock Data Recording (REC) and Log View (LOG) features. • Enable automatic data saving at the end of the timer. *Video ads can be viewed by tapping the premium feature or by going to "Settings". [How to Use] 1. Power On: Long-press the power button to start sensing. 2. Hold Value: Tap the "Hold" button or Volume Down to freeze the current measurement. 3. Save Data: Tap "REC" or Volume Up to log the date, time, and Lux value (Premium feature). 4. Calibration: Visit the settings and use the "Calibration Helper" to match the app's output with any professional reference meter.