Track how well your mechanical watches keep time, measured in seconds per day (SPD). The accuracy feature lives in the Accuracy tab on each watch's detail page and has sub-tabs: Log Accuracy, Reference Clock, Timegrapher (mobile apps only), and Help.
Log Accuracy
To record a measurement, you compare what time your watch shows to the actual time. On the Log Accuracy tab, set the time your watch is currently displaying and tap Log. WristLog calculates the difference and figures out the SPD based on time elapsed since your last record.
Quick buttons let you pick common offsets before the target. Use the + and - buttons to adjust by one minute. You can also add an optional note (e.g., "On wrist", "Dial up") to track how position affects accuracy. Quick notes are configurable in settings.
Don't record accuracy too often. Once or twice a day should be enough for a mechanical watch. More frequent recordings amplify small timing errors.
Baselines
A baseline is your starting reference point. When you create a baseline record, it resets the accuracy tracking — future measurements are calculated from this new point. Toggle Baseline record when logging accuracy to create one.
You should create a new baseline after servicing or adjusting your watch, or any time you want to start fresh. You can also convert any existing record to a baseline using the flag icon in the accuracy log (only the last record can be converted).
Reference Clock
The Reference Clock tab shows a precise animated clock with the current time in your timezone. Use it as your time reference when comparing against your watch.
The Reference Clock is also accessible from the user dropdown menu in the header.
Timegrapher
The mobile app has a built-in timegrapher that uses your phone's microphone to listen to your watch's ticking and calculate its rate. Place your phone's microphone firmly on the watch and tap Start Listening. Hold still for at least 15 seconds in a quiet environment.
The timegrapher displays Rate (sec/day), Beat Error (ms), Amplitude (degrees), Signal Quality, and Reading Stability. You can select a BPH preset or let it auto-detect. Lift angle can be set manually.
Your phone's microphone and speakers contain a magnet. Make sure your watch can withstand magnetism before using this feature, especially during long exposures.
AI Accuracy Insights
From the Accuracy tab, tap the AI button to get AI-generated insights about your watch's accuracy trends. The AI analyzes your measurement history and provides observations. You can rate insights as helpful or not to improve future results.
AI results are experimental and may contain inaccuracies or fabulations.
Accuracy Log
The main Accuracy tab shows a chart of your SPD history and a table of all records. You can filter by time range. When using longer time ranges, the chart shows weekly averages instead of individual readings. A summary line tells you how your watch is currently running.