Name: Battery - Six Weeks of Charge History - StateCue
Rating: 5 (1 reviews)
Author: SimplySoft

Your watch shows a battery percentage. It does not show how fast that number is falling, how long the last charge lasted, or whether it lasts less than it used to. This app records that and draws it.

SEVEN SCREENS, SCROLLED UP AND DOWN
• NOW - how long it will last, and whether it is draining faster than your usual
• LAST 6 H - the closest look, scaled to the range that occurred
• LAST 24 H - a full day, sleep and training and all
• SINCE CHARGE - the curve, extended by a dashed line down to zero
• 7 DAYS - a week in one chart, charging periods marked
• 6 WEEKS - one bar per day: does it hold less than it did?
• STATISTICS - per day, busiest day, charges, hours of activity

THE ESTIMATE COMES FROM YOUR OWN RHYTHM
Time left is computed from your own recorded history, not from a rule of thumb. Someone who records an activity every day and someone who wears the watch for the clock get different answers, because they have different histories. In the first days after installing, before there is history to measure, the watch's own estimate is shown instead - and the screen says which one you are looking at.

THE HISTORY STARTS WHEN YOU INSTALL IT
Connect IQ gives no access to past battery levels - there is no such API, and nothing is stored on the watch to read. The app therefore records the level itself, every 15 minutes, and the six-week chart fills up over six weeks. Every screen says so while it is still collecting, rather than showing an empty frame.

ONE PERMISSION, AND IT OPENS NOTHING
Reading the battery costs no permission at all. The app asks for exactly one - Background - and only so it can record while it is closed. Unlike location, sensors or user profile, that permission grants access to no data whatsoever; it is the right to be woken up, nothing more. No sensors. Nothing leaves the watch.

WHAT THE CHART MARKS
Charging periods sit as a band at the foot of the chart. Recorded activities sit as a band along its top. Stretches that fell faster than the rest are drawn in amber - so a steep slope and the training that ran through it line up on the same screen, and you can see for yourself whether they go together.

GAPS STAY GAPS
When the watch is off, no measurement exists for that time. The chart shows a break there instead of drawing a line across it.

You can set the recording interval to 30 or 60 minutes if you would rather have fewer wake-ups.

This app is for informational purposes only.