AutoSleep vs Noom

AutoSleep is a sleep-tracking app for Apple Watch and iPhone that records sleep automatically in the background, without requiring the user to start or stop a session. It uses heart rate, motion, and (where available) blood oxygen and wrist temperature data to estimate sleep stages, sleep quality, and a running sleep debt total called the sleep bank. The app integrates with Apple Health and HomeKit, offers a smart alarm that wakes users during a lighter sleep phase, and includes an add-on companion app, AutoSnore, for snore detection. It is sold as a single one-time purchase on the App Store rather than a subscription, and processes data on-device rather than through a cloud account.

Noom is a behavior-change program focused on weight management, pairing daily psychology-based lessons with food logging, activity tracking, and optional human coaching. Beyond its core Noom Weight program, Noom Med connects users with licensed clinicians who can evaluate eligibility for prescription weight-loss medication support.

• One-time purchase price with no ongoing subscription fees
• Fully automatic tracking that does not require remembering to start or stop a sleep session
• Detailed metrics including sleep stages, SpO2, respiration rate, and wrist temperature on supported hardware
• On-device processing with no account or login required for basic use

• Behavior-focused approach differentiates it from simple calorie-counting apps
• Access to human coaching adds accountability beyond self-tracking alone
• Noom Med offers a path to medically supervised options for eligible users
• Backed by psychology-based program design rather than generic diet rules

• Requires an Apple Watch for automatic tracking; iPhone-only use is far more limited
• Advanced metrics like SpO2 and respiration depend on specific newer Apple Watch models
• Interface and terminology (sleep bank, sleep debt) have a learning curve for new users

• Subscription cost is higher than many basic calorie-tracking apps
• Daily lesson format requires consistent time investment to get full value
• Noom Med pricing adds substantially on top of the base program if medication is pursued