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★★★★★
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Pro is now a one-time purchase with no subscription or auto-renewal. Also includes small improvements.
DeciTrack turns your iPhone into an instant decibel meter. LIVE METER Point at any sound source — conversation, traffic, concert, machinery — and watch the real-time dB SPL gauge respond immediately. LOG & GRAPH Tap Record to save a reading with average dB, peak dB, and duration. Build a history over time, visualize trends on a line chart, and label each entry for easy reference. EXPORT Pro users can export the full log as a CSV file to share or analyze in any spreadsheet app. ON-DEVICE & PRIVATE All processing happens on your device. No account, no cloud sync, no data collection. DECITRACK PRO Unlock unlimited logs, CSV export, calibration offset, and an ad-free experience. DISCLAIMER DeciTrack provides approximate sound level estimates using your device's built-in microphone. Results vary by device model, case, and environment. This app is not a replacement for a certified or calibrated sound level meter and should not be used for regulatory, legal, or occupational health compliance. Pro is a one-time purchase — no subscription, no auto-renewal. Existing subscribers keep their access. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/