Small differences are normal—sleep staging is estimated from heart rate and movement. Wrist-based devices may introduce more noise than finger-based wearables, and also may use different algorithms to identify sleep stages.
When you first start using the AlterMe ring, it undergoes a calibration phase to collect baseline data. During the first three nights, sleep data may be limited or unavailable. On the fourth morning, the ring will generate your first readiness score. This is a normal part of the learning phase.
What can affect readings:
Fit: Improper fit (such as a ring that’s too large) can disrupt signals.
Wind-down time (reading/TV): Calm pre-bed activities can appear as wind-down or occasionally light sleep due to normal physiological drops in heart rate and movement.
Night movement: Awakenings (pets, kids, bathroom trips) can fragment sleep and shift stage estimates.
Battery: Low battery—or the ring dying overnight—can impact sleep stats.
Tips to improve accuracy:
Fit & placement: Wear the ring snug (not tight) with sensors on the palm side.
Try another finger: Everyone’s physiology is different. If readings seem off, try a different finger (often index or middle, non-dominant hand). Once you find the most reliable spot, stick with it for consistency.
Battery & sync: Keep battery above 40% and, after waking, open the AlterMe app with the ring nearby to sync.
Give it a few nights: Accuracy improves with consistent wear across multiple nights.
App settings: Verify the AlterMe app is updated to the latest version, enable Bluetooth and background app permissions, and force-quit and reopen the app if sleep data isn’t appearing.
Power cycle: Reboot the ring by opening the app, tapping the ring icon in the top right, swiping left, and selecting "Power Cycle."
Advanced troubleshooting: Unpair and re-pair the ring to refresh the Bluetooth connection, and update your phone’s operating system to the latest version.
Escalation: If issues persist, consider requesting a size exchange or ring replacement.