If Sleep Pulse 3 is not showing up after downloading the latest version from the App Store, try:
1. Delete and Reinstall Sleep Pulse from the App Store.
2. Restart both your iPhone and Apple Watch.
If Sleep Pulse 3 still does not appear under available apps for your Apple Watch, confirm your Apple Watch is on watchOS 4 or greater.
watchOS 4 & iOS 11 or greater ✅
Sleep Pulse 3 requires iOS 11 and watchOS 4 or greater to utilize the new updates for motion processing performance and Health metric changes.
For information on updating your Apple Watch to watchOS 4, visit this Apple support document: