SWT BNZ - Tatli Bon-za

Designed for film photography enthusiasts, this utility helps measure and verify the real shutter speeds of mechanical and vintage cameras using only a smartphone’s built-in microphone. By listening to the acoustic signature created when a shutter fires, it analyzes timing differences between mechanical events and calculates the actual exposure duration with remarkable precision. The experience is built around a simple workflow: select a camera body, position the device near the microphone area, trigger the shutter, and receive an instant diagnostic result. Measurements are presented in both shutter-speed fractions and milliseconds, making it easy to compare real performance against expected values. Advanced waveform visualizations provide transparency into how results are calculated, helping users better understand the behavior of their equipment. To improve reliability, multiple readings can be taken and combined using median-based calculations, reducing the impact of environmental noise and measurement variance. Confidence indicators, signal-quality feedback, and error detection systems help identify weak captures, excessive noise, or invalid readings before they affect results. A built-in history log allows users to store, review, and compare measurements over time, making it useful for tracking shutter performance, identifying drift, and documenting maintenance. Camera body profiles keep readings organized across multiple cameras, while detailed result views provide deeper insight into timing accuracy and waveform characteristics. Built with an offline-first philosophy, all measurements and data remain on the device. No accounts, subscriptions, cloud syncing, or external hardware are required. The result is a focused diagnostic tool that helps photographers evaluate, monitor, and better understand the mechanical performance of their cameras with speed, clarity, and confidence.