Even Keel reads the export from your Visible app and looks back over it for the patterns in how you crash and recover, so you can pace with that knowledge instead of guessing. It pays the most attention to the way a crash can land a day or more after you have overdone it, the pattern that is hardest to catch by feel alone. It also weighs the mental and emotional effort of your day, not just the physical, since a demanding or stressful day can set off a crash even when you have barely moved. I built it for my wife, who uses the Visible band, after watching that data sit there unused.
Please take it as a way to spot patterns in your own past data, nothing more. It is not a diagnosis, and it is not a substitute for advice from a doctor.
To export from Visible, open the app and go to Profile, then Data Export, then Export CSV. Your raw file is read inside your browser and is never uploaded. If you choose the optional AI guide, Even Keel first shows you what reduced health summary will be sent.
A one-off download, usually a couple of taps.