About this app
PhonoCalibre helps vinyl listeners measure turntable speed stability and platter level with the motion sensors already in iPhone Place iPhone at the center of the platter choose 33 45 or 78 RPM and start a measurement while the turntable spins PhonoCalibre analyzes motion data to estimate average RPM speed error wow and flutter drift peak variation and measurement confidence Use the Level tab to align your platter before a run The live bubble view shows pitch roll and tilt and gives simple guidance for raising the correct edge until the platter is level Each run is saved in history so you can compare before and after adjustments review charts share a plain report or export CSV data for your records Designed for turntable setup maintenance and repeatable checks without a test record or microphone
Audience growth
Ratings growth
Baseline captured. Growth appears after the crawler observes a changed rating count.
Momentum comes from crawler snapshots for the tracked storefront. “Viral growth signal” means unusually fast recent rating gains; it is an indicator, not download data.
Price tracking
Price intelligence
First snapshot captured. The trend line starts after the next crawler price observation.
- First observed Aug 19, 2026 · 8:02 AM $2.99
Screenshots
