Comparison

SpO2 Watcher vs SleepWise

Price, ratings, monetisation and update history for both apps, side by side β€” with what reviewers say about each.

Head to head
About

SpO2 Watcher

This utility app restores blood oxygen level insights to your Apple Watch. It retrieves data from HealthKit and displays it on your watch face and dashboard, offering real-time readings and historical trends. Designed for privacy, your data remains on your device.

Highlights
  • Re-enable watch visibility for SpO2
  • Real-time blood oxygen dashboards
  • Advanced watch complications
  • 24-hour interactive history graph
  • Automatic background sync
  • 30-day trend analysis
  • On-device data storage
Features
Read full description

RESTORE YOUR SPOβ‚‚ INSIGHTS ON APPLE WATCH SPOβ‚‚ Watcher is a specialized utility designed for users who want full visibility of their blood oxygen data directly on their wrist. While some devices may not display these readings natively, your sensor is still active and securely recording data to the Apple Health app. SPOβ‚‚ Watcher acts as the essential bridge, retrieving that data from HealthKit and restoring it to your watch face and dashboard. β€” KEY FEATURES β€” ● RE-ENABLE WATCH VISIBILITY If you lack a native on-device option to view your blood oxygen levels, our app provides the solution. It pulls the SpOβ‚‚ data already stored in your HealthKit database and displays it instantly on your Apple Watch. ● REAL-TIME DASHBOARDS View your latest blood oxygen percentage at a glance with high-contrast, easy-to-read designs optimized for clarity on the go. ● ADVANCED WATCH COMPLICATIONS Personalize your watch face with our specialized "Four Corner" layout. See your current SpOβ‚‚ value, exact time of measurement, and a smooth historical trend graph without needing to open your iPhone. ● 24-HOUR INTERACTIVE GRAPH Visualize your daily fluctuations with a detailed 24-hour history line chart, helping you identify patterns in your respiratory wellness throughout your routine. ● AUTOMATIC BACKGROUND SYNC Using intelligent observer queries, the app detects new scans as soon as they reach your Health app, ensuring your watch complications stay updated automatically. ● 30-DAY TRENDS Dive deep into your history with comprehensive daily averages, highs, and lows to help you track your long-term wellness journey. β€” PRIVACY & SECURITY: YOUR DATA STAYS YOURS β€” We believe your health data is your most sensitive information. SPOβ‚‚ Watcher is built with a Privacy-First architecture: ● ON-DEVICE STORAGE: All your blood oxygen data is stored locally on your iPhone and Apple Watch. ● NO CLOUD BACKENDS: Your data stays in the secure Apple Health database on your device. We do not have a backend; your data is never "in flight" to a third-party server. ● END-TO-END ENCRYPTION: Your health information is encrypted whenever your device is locked. ● NO DATA SELLING: We strictly follow Apple’s developer guidelines. Your health data is never shared with advertisers or data brokers. β€” WE DO NOT USE YOUR DATA β€” Your data belongs to you. SPOβ‚‚ Watcher does not collect, store, or transmit your health information to any external location. The app simply requests permission to read "Oxygen Saturation" from the Apple Health app for the sole purpose of displaying it locally on your device. We have no access to your data, and we do not track your usage. β€” IMPORTANT DISCLAIMER β€” This app is intended for fitness and wellness purposes only and is not a medical device. It is not intended for the diagnosis of disease or other conditions, or in the cure, mitigation, treatment, or prevention of disease. Always seek the advice of a physician or other qualified health provider with any questions regarding a medical condition. β€” TECHNICAL REQUIREMENTS β€” ● Requires Apple Watch Series 6 or later (excluding SE) with Blood Oxygen sensor. ● Requires authorization to access Oxygen Saturation data in the Apple Health app.

About

SleepWise

Features
Read full description

SleepWise is your personal sleep tracker and coach built to help you log rest, understand your patterns, and build healthier nights without complexity. Whether you track manually or sync with Apple Health, SleepWise turns your sleep data into clear scores, streaks, and actionable guidance you can use tonight. FEATURES SLEEP TRACKING β€’ Log bedtime, wake time, quality, and notes β€’ Import and sync sleep from Apple Health β€’ View sleep history with trends and insights β€’ Track your sleep score, recovery, debt, and streaks DAILY COACHING β€’ Personalized bedtime recommendations β€’ Nightly sleep report with score and insights β€’ Coach tips based on your habits and goals β€’ 1 free AI coach message to try personalized chat HABITS & ROUTINE β€’ Evening check-in (mood, stress, caffeine, exercise, and more) β€’ Wind-down session tracking β€’ Chronotype quiz to understand your natural rhythm β€’ Smart reminders for wind-down, bedtime, and check-ins APPLE WATCH & WIDGETS β€’ Apple Watch companion: Coach tips, log sleep, daily stats β€’ Home Screen widget with your latest sleep score β€’ Works offline-first, your data stays on your device SLEEPWISE PRO Premium features for deeper insights and unlimited coaching AI SLEEP COACH CHAT Ask unlimited questions about your sleep, habits, caffeine, stress, wind-down routine, and recovery β€” powered by personalized context from your logs. WEEKLY & MONTHLY REPORTS See trends across the week and month: average sleep, goal nights hit, and summaries that help you spot what’s working. ADVANCED HABIT CORRELATIONS Discover how caffeine, late dinners, exercise, stress, and screen time connect to your sleep quality. SLEEP CYCLE OPTIMIZER Get smarter bedtime and wake-time suggestions aligned to sleep cycles and your goals. AI SLEEP SUGGESTIONS Personalized target recommendations based on your patterns and chronotype. WIDGET CUSTOMIZATION Choose layouts and what to show on small, medium, and large widgets. APPLE WATCH PRO REPORTS Weekly and monthly reports on your wrist (Pro subscribers only). SLEEPWISE β€’ Beautiful, focused design built for nightly use β€’ Science-informed coaching β€” supportive, clear, action-oriented β€’ On-device intelligence β€” no account required to get started β€’ Privacy-first: your sleep data stays on your device Start free. Upgrade to SleepWise Pro when you’re ready for unlimited AI coaching, deeper analytics, and advanced personalization. SUBSCRIPTION INFORMATION SleepWise Pro is available as a monthly, annual, or lifetime subscription (where offered). Payment is charged to your Apple ID account at confirmation of purchase. Subscription renews automatically unless canceled at least 24 hours before the end of the current period. Manage or cancel in App Store Account Settings. Privacy Policy: https://sites.google.com/view/sleep-wise Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

SpO2 Watcher4 screens
SleepWise4 screens

Verdict

The call

The clearest difference is price: SleepWise at Free against SpO2 Watcher's $0.99. SpO2 Watcher's advantage is in-app purchases (none vs 3) and chart position (#184 vs unranked). On update cadence, ads, device support and iOS requirement there is nothing between them.

Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS

CostPrice Β· In-app purchases Β· Ads Β· Monetization

SleepWise is free to download; SpO2 Watcher costs $0.99 up front. SleepWise sells 3 in-app purchases, starting at $0.99 per month. SpO2 Watcher asks for nothing beyond the download.

UpkeepUpdate frequency

SpO2 Watcher ships an update every 2 months, SleepWise every 3 months. The most recent releases landed on October 25, 2026 and October 14, 2026 respectively.

Scorecard3 real differences Β· 6 level
SpO2 Watcher versus SleepWise: the parameters behind the verdict, then further details
ParameterSpO2 WatcherSleepWise
Price$0.99Free β€” better
Positive reviews25.0% of reviewsβ€”
Update frequencyEvery 2 months β€” betterEvery 3 months
AdsNoNo
In-app purchasesNo β€” betterYes
MonetizationPaidβ€”
Best chart rank#184 β€” betterβ€”
DevicesiPhone, Apple WatchiPhone, iPad, Apple Watch β€” better
Requires iOS1817.0 β€” better
Further details β€” not scored
Size8 MB20 MB
Age rating4+4+
DeveloperESCAPADE GLOBAL PRIVATE LIMITEDHexalitics Technology Pvt. Ltd.

In-app purchases

None

SpO2 Watcher

No in-app purchases

3 purchases

SleepWise

Subscriptions2
  • Monthly7 Days trial$0.991 Month
  • Annual7 Days trial$9.991 Year
One-time1
  • Lifetime$29.99

Questions

Is SpO2 Watcher free?
SpO2 Watcher costs $0.99, with no in-app purchases.
Is SleepWise free?
SleepWise is free to download, with in-app purchases available.
Do SpO2 Watcher or SleepWise have ads?
Neither SpO2 Watcher nor SleepWise shows ads.
Which is updated more often, SpO2 Watcher or SleepWise?
SpO2 Watcher ships an update every 2 months, and SleepWise every 3 months. Most recently, SpO2 Watcher was updated on October 25, 2026 and SleepWise on October 14, 2026.

Other comparisons