CPAP Tracker vs SubMetrix
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
CPAP Tracker
Manage your CPAP equipment and track sleep health. Log daily AHI, monitor supply inventory, and schedule cleaning tasks. Integrates with Apple Health for comprehensive sleep data analysis.
- CPAP equipment maintenance tracking
- On-hand inventory management
- Daily AHI logging
- Apple Health sleep data integration
- Cleaning schedule reminders
- Replacement notifications
- Apple Watch app
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Keep your CPAP equipment on track with smart maintenance management, on-hand inventory tracking, daily AHI logging, and sleep data from Apple Health. CPAP Tracker helps you maintain your sleep apnea equipment by tracking replacement schedules, on-hand supplies, cleaning tasks, daily AHI readings, and sleep data from Apple Health — all in one simple app. **APPLE WATCH APP** Log AHI, complete cleaning tasks, and track equipment from your wrist AHI complication for your watch face Sync status indicator with one-tap retry **DAILY AHI TRACKING (Optional)** Log daily AHI (Apnea-Hypopnea Index) readings One-tap presets for all five severity ranges Editing past entries requires explicit unlock Visual history of your entries Earn XP and celebrate streaks for consistent logging Log past dates and edit or delete entries anytime Guided onboarding — toggle anytime in Settings **SLEEP CORRELATION INSIGHTS** See AHI data alongside Apple Health sleep metrics Compare deep sleep, REM, total sleep, SpO2, and efficiency Side-by-side patterns for nights with different AHI ranges Share your data with your doctor Data presentation, not medical advice **EQUIPMENT TRACKING** Track masks, cushions, tubing, filters, headgear, and water chambers Set custom replacement intervals for each item Visual progress indicators show equipment age at a glance Get notified before items are due for replacement **ON-HAND INVENTORY** Tap "Track inventory" on any consumable to set how many you have Auto-decrements every time you mark a replacement Low-stock badge in the list when you're at or below your threshold Custom threshold per item, or a global default in Settings Pro: push reminder when stock crosses the threshold, so replacements arrive before you run out Opt-in per consumable **CLEANING SCHEDULE** Daily, weekly, and monthly cleaning task reminders Step-by-step cleaning instructions for each component Mark tasks complete and track cleaning history Tasks automatically appear based on your equipment Pro: customize how often each task is due (more often than the default) **SLEEP DATA INTEGRATION** Connect to Apple Health to view sleep patterns Sleep sessions match your CPAP machine's app — attributed to the day you went to bed (noon-to-noon window) See sleep duration, time in bed, and efficiency Highest, average, and overnight-low SpO2 on the trend chart Track 7-day and 30-day sleep averages Smart deduplication across Apple Watch, Oura, Whoop, AutoSleep **SMART NOTIFICATIONS** Replacement reminders before items expire Cleaning task notifications Low-stock reorder reminders (Pro) AHI logging reminders to maintain your streak Customizable notification timing **HOME SCREEN WIDGETS** Quick-glance equipment status on your Home Screen Cleaning Due and Streak/Level widgets **MAKE IT YOURS** Optional Celebration Animations toggle for a toned down post-save experience Optional AHI tracking — disable it and the entire feature is hidden Example data preview if you haven't connected Apple Health yet **FREE FEATURES** Track up to 5 consumables On-hand inventory with low-stock badge in the list Full cleaning schedule with default intervals Optional daily AHI logging with streaks and XP Sleep data integration with Apple Health Sleep Correlation Insights All notifications included Apple Watch app Home Screen widgets **PRO UPGRADE (One-Time Purchase)** Unlimited consumable tracking Low-stock reorder push reminders Customizable cleaning intervals (sync across iPhone, iPad, and Apple Watch) iCloud sync across all your devices, including Apple Watch Replacement history per consumable PDF export — equipment report and sleep-specialist report Ad-free experience Future Pro features included CPAP Tracker keeps your replacement, cleaning, and inventory schedule organized in one place. This app is a personal logging tool, not medical advice. Always consult your sleep specialist about your CPAP therapy.
SubMetrix
This app helps Jiu-Jitsu practitioners track their training sessions, analyze their performance, and improve their skills. It provides detailed insights into submissions, positions, and weaknesses, offering tools like flow maps and flashcards to enhance learning and strategy.
- Track every roll with details
- Analyze submissions and weaknesses
- Visualize game flow and build plans
- Improve knowledge with flashcards
- AI companion for technique guidance
- Performance analytics and data export
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SubMetrix is the advanced Jiu-Jitsu tracker built for serious grapplers and academies. Turn every roll into data, find your weak spots, and watch your game evolve. TRACK EVERY ROLL Log sessions in seconds — Gi or No-Gi, rounds, intensity, duration, and partners. Build a complete history of your mat time and training volume. COMBAT INTELLIGENCE Record every submission you land and every tap you give up. SubMetrix turns it into a clear picture of your game: your Lethal Weapon (your highest-percentage finish), your Critical Weakness (what keeps catching you), and your Nemesis (the positions costing you rounds). KNOW YOUR NUMBERS Clean dashboards break down your submissions, positions, takedowns, and progress over time — so you stop guessing and start training with intent. FLOW MAPS & GAMEPLANS Chain your techniques into flows and build tournament-ready gameplans. See exactly how your A-game connects from takedown to finish. MENTAL RECALL Sharpen your knowledge with BJJ flashcards and terminology quizzes spanning positions, submissions, and concepts from white belt to black. — SUBMETRIX PRO — Unlock the full arsenal: • AI Companion — your personal on-device BJJ coach. Ask how to hit or escape any technique and get step-by-step breakdowns, plus advice personalized to your own logged training. It even remembers your session notes. Works offline, right on the mats. • Performance Analytics — deep dives into your trends and tendencies. • Tournament Gameplan builder. • Training Journal & Breath Trainer. • Export your full training data anytime. Whether you're a hobbyist chasing your next stripe or a competitor prepping for the podium, SubMetrix helps you train smarter and evolve faster. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is review sentiment: SubMetrix at 100% against CPAP Tracker's 33%. SubMetrix also leads on rating (5.0 vs 3.5) and ads (none vs shown). CPAP Tracker's advantage is iOS requirement (17.0 vs 26.2). On price, ratings volume, in-app purchases and monetization model there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. CPAP Tracker sells 1 one-off in-app purchase and SubMetrix sells 1 in-app purchase, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.
SubMetrix holds the better App Store score, 5.0 against 3.5. Both are backed by a comparable volume of ratings — 8 and 6 respectively. Written reviews point the same way: 33% of CPAP Tracker's written reviews are positive against 100% of SubMetrix's.
CPAP Tracker ships an update every 9 days, SubMetrix every 4 days. Both last shipped on October 31, 2026.
| Parameter | CPAP Tracker | SubMetrix |
|---|---|---|
| Price | Free | Free |
| Rating | 3.5 (8 ratings) | 5.0 (6 ratings) — better |
| Positive reviews | 33.3% of reviews | 100.0% of reviews — better |
| Number of ratings | 8 — better | 6 |
| Update frequency | Every 9 days | Every 4 days — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Freemium |
| Devices | iPhone, iPad, Apple Watch — better | iPhone, iPad |
| Requires iOS | 17.0 — better | 26.2 |
| Further details — not scored | ||
| Size | 28 MB | 19 MB |
| Age rating | 4+ | 4+ |
| Developer | Kristian Doran | Dane Chapman |
Customer experience
CPAP Tracker
SubMetrix
In-app purchases
CPAP Tracker
- CPAP Tracker Pro$3.99
SubMetrix
- SubMetrix Pro (Monthly)$1.991 Month









