Android · audio · on-device privacy
Tools for measuring and understanding sound on your phone.
FranJAM Apps builds focused utilities for musicians, technicians, and anyone who needs indicative SPL readings, spectrum analysis, and overnight noise logging—without sending your microphone data to the cloud.
ProAudio Tools
All-in-one pro-audio utility: level meter, portrait RTA, tone generator, and overnight peak logging. Readings are indicative—calibrate for your device; not a replacement for Class 1 sound level meters.
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Sound level meter
Slow, Fast, and Impulse weighting, live history graph, reference calibration trim.
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Real-time analyzer
Portrait log-spaced spectrum, peak and RMS readouts, peak-hold markers.
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Tone generator
Sine, pink, and white noise for quick checks and relative calibration.
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Overnight noise log
Background sessions with threshold-based peak events and morning reports. Audio stays on your device until you export.
Built with care
Created by Francisco Aguilera, Staff Android engineer (performance, reliability, mobile SDKs). ProAudio Tools first shipped in 2013; the 2026 relaunch under FranJAM Apps modernizes the UI and adds overnight logging for high-intent use cases—neighbors, sleep, rentals.
About FranJAM Apps
A small independent label for Android utilities that should feel precise, honest, and respectful of your data. One app, done well, beats a portfolio of clones.
- On-device processing by default
- No account required for core features
- Clear limits (phone mic ≠ legal metrology)
- Play Vitals and crash-free quality as a baseline