Pain or numbness
Stop if you feel pain, numbness, tingling, or unusual weakness, and seek professional advice.
Safety boundary
Take care of yourself before chasing a count.
Wrist Trainer can count and save a session summary, but it cannot judge pain, injury, or recovery. Any discomfort matters more than finishing a target.
Stop now
Do not keep chasing reps when these appear.
Swelling or discomfort
Do not use an app prompt as a reason to continue through swelling or a new persistent sensation.
Unstable posture
If the phone cannot stay stable or the movement plane is unsafe, end the session and reset later.
What it can do
Give you rhythm feedback, not a diagnosis.
The app estimates relative phone posture, counts movement, and stores a summary. It does not provide diagnosis, prescriptions, recovery judgments, or emergency care.
- Follow professional guidance first. Target angles and counts are not universal prescriptions.
- Use the setup described. Sideways grip, screen down, and a level forearm are engineering starting conditions.
- Move slowly and notice your body. The app cannot read pain or fatigue.
- End manually when needed. Completed work can still be saved as a local summary.