Watch Tracker vs Phono Calibre

Watch Tracker is a revolutionary app for tracking the accuracy of a wristwatch. It's dramatically easier and more accurate than any previous method. Just tap a button when the time on your watch matches the time displayed by the app, and Watch Tracker does the rest. It synchronizes with an atomic clock, measures and records the difference, and displays graphs of all the data points you've recorded. - Uses best-fit analysis to accurately calculate how many seconds your watch gains or loses per day - Displays graphs of rates and variance - Can track multiple watches simultaneously - Saves data in CSV files that can be opened with any spreadsheet software Watch Tracker is made by the developer of tChess (the chess app that was featured in Apple's "Learn" commercial for the iPad) and Learn Chess (the Apple Staff Favorite e-book).

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