Precision Watch vs BinaryClockWatch

Is your mechanical watch running fast or slow? Find out in minutes. Precision Watch measures your watch's true daily accuracy by comparing it to atomic time — no expensive timegrapher and no trip to the watchmaker. Start a measurement, come back later, enter what your watch reads, and see exactly how many seconds per day your watch gains or loses. WHY PRECISION WATCH • Atomic-accurate — every measurement is referenced against an atomic clock • No microphone guesswork — a reliable, repeatable method that actually works • Track every watch — build your collection and follow each one's rate over time • Fast & beautiful — a clean, native experience made for watch lovers • Private — everything stays on your device, no account required HOW IT WORKS 1. Sync your watch to the on-screen atomic clock 2. Wait — from a few minutes to several hours, your choice 3. Enter what your watch reads now 4. Get your precise +/- seconds-per-day result Know when your watch truly needs a service — and when it doesn't. Stop guessing and start measuring. Precision Watch Pro unlocks unlimited saved measurements and your full watch collection. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

BinaryClockWatch doesn't show the time like every other watch. It shows it in 13 different number systems, right on your watch face as a complication. From binary and BCD (binary-coded decimal) to octal, hexadecimal, Gray code, balanced ternary, Fibonacci, Babylonian base 60, Braille, Mayan numerals, Roman numerals, Cistercian monk numerals and the I Ching: every system shows hours and minutes its own way, with 20 complications for every watch face family. FEATURES • 13 number systems as watch face complications • Concentric rings, BCD dot grids or inline text, depending on the system • Separate hour and minute rings for more flexibility • Corner complications with a curved dot line along the edge of the watch face • Automatic color adaptation to your system theme • Built-in guide with an explanation and a live example for each of the 13 systems • Completely free: no ads, no in-app purchases, no data collected For everyone who would rather read the time than just glance at it, and for everyone who finds number systems fascinating. BinaryClockWatch runs independently on Apple Watch, no iPhone app required.