CPR Nutrition vs Custom Rings
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
CPR Nutrition
This app helps you optimize your diet by focusing on your calorie-to-protein ratio and protein quality. It uses AI to scan food labels and estimate meal nutrition, offering features like progress tracking and gamified challenges.
- AI food label scanning
- Meal nutrition estimation
- Calorie to protein ratio tracking
- DIAAS protein quality scores
- Workout and progress tracking
- Gamified achievements
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Transform your nutrition with AI-powered tracking. CPR Nutrition makes it easy to hit your protein goals with features no other app offers. CPR NUTRITION Features: (Subscription Required) Full access requires a subscription: $29.99/year after a 3-day free trial. CALORIE TO PROTEIN RATIO (CPR) This app centers around tracking your calorie to protein ratio, with 10:1 calories:protein being the "optimal" ratio. All of your logged foods each day, aggregate and individual, will be scored this way so that you can see if you have adequate protein density in your diet. Doing this will allow you to eat less while feeling satiated and full as well as consuming less calories overall. DIAAS PROTEIN QUALITY SCORES Not all protein is equal. Get science-backed protein quality scores (DIAAS) for every food you log—a first for any consumer nutrition app. Think of protein like building materials for muscle. If you don't have all the materials, you can't make muscle. Imagine you want to build a house and you need wood, nails, insulation, concrete, etc to do so. High quality protein will be all of those materials, while low quality protein will be missing 1 or more key material. Generally you should get around 75% of your daily protein from high quality sources. The 25% of protein that is low quality typically can be paired with the rest of the protein you consume to create a complete amino acid profile. AI FOOD LABEL SCANNER Point your camera at any nutrition label and let Google Gemini AI extract all the macros. DESCRIBE ANY MEAL Just type "grilled chicken with rice and broccoli" and get accurate nutrition estimates powered by Gemini 3 Pro. FIND GREAT HIGH PROTEIN MEALS Share recipes with other users and search our entirely user created database of recipes ALL-IN-ONE TRACKING • Meals & macros with detailed breakdowns • Workouts & lifting progress • Supplements & vitamins • Weight & body measurements • Daily step count (HealthKit integration) PROGRESS PHOTOS & SOCIAL FEED Track your transformation with progress photos. Automatically generate slideshows of your progress! PERSONALIZED GOALS Set calorie and protein targets based on your body, activity level, and goals. GAMIFICATION Earn XP, level up, and unlock achievements! Start your 3-day FREE trial today. Questions? Contact cprnutritionapp@gmail.com Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Custom Rings
Create and track custom daily goals beyond standard activity metrics. Organize them into sets, sync with Apple Health, and compete with friends. Offers reminders, history, and streaks for motivation.
- Customizable goal rings
- Auto-tracking from Apple Health
- Session clusters for manual counters
- Scheduled rings for specific days
- Social sharing and challenges
- Apple Watch support
- Home and Lock Screen widgets
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Make progress on what matters to you. Custom Rings turns your habits and goals into personal rings: reading, water, movement, focus, practice, and more. Choose a name, unit, target, schedule, and color, then check in with a simple +. A SIMPLE DAILY CHECK-IN See your rings together on Today. Use your preferred quick amount, open a ring to enter a custom amount, and undo an accidental entry. Starter templates make it easy to begin. A CLEARER VIEW OF YOUR PROGRESS Your free seven-day overview shows completed goals and a daily tracker. Explore deeper comparisons, thirty-day summaries, full calendar history, and CSV export with Pro. CONNECTED TO APPLE HEALTH Connect compatible data for steps, active calories, exercise minutes, stand hours, walking distance, flights climbed, sleep, water, and time in daylight. Available data depends on your devices and permissions. Raw Health samples are processed on your device. IPHONE, WIDGETS & APPLE WATCH Keep goals visible with Home Screen and Lock Screen widgets. Use Quick Track to log progress, or check in from Apple Watch. The Three Rings complication lets you choose a different daily ring for each position in a large rectangular Watch face slot, with totals, percentages, or progress remaining. MORE WAYS TO MAKE IT YOURS Create session counters for goals that should not reset at midnight, such as workout sets or game scores. Use scheduled rings and reminders to fit your routine. Export a local backup of your rings and history, preview a backup before importing, and keep a recovery copy when restoring. OPTIONAL SHARING Sign in with Apple to add friends and share only the rings you choose. Pro adds more social features, including challenges, recurring seasons, and nudges. No account is required to track your own rings. START FREE • One group with up to five rings • Seven-day Progress overview and daily tracker • Up to three friends • Apple Health auto-tracking types • Scheduled rings and session counters • Reminders, widgets, Siri, and Watch complications PRO — ONE-TIME PURCHASE • Unlimited groups • Deeper insights and thirty-day summaries • Full calendar history and CSV export • Unlimited friends • Challenges, recurring seasons, and nudges No subscription. No ads. Your rings, your goals, your pace. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is rating: CPR Nutrition at 5.0 against Custom Rings's 4.4. CPR Nutrition also leads on review sentiment (100% vs 75%). Custom Rings's advantage is monetization model (freemium vs subscription) and update cadence (every 4 days vs every 9 days). On price, ads, in-app purchases and device support 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. CPR Nutrition sells 1 in-app purchase, starting at $29.99 per year and Custom Rings sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
CPR Nutrition holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: Custom Rings has 7 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 100% of CPR Nutrition's written reviews are positive against 75% of Custom Rings's.
CPR Nutrition ships an update every 9 days, Custom Rings every 4 days. The most recent releases landed on October 7, 2026 and October 28, 2026 respectively.
| Parameter | CPR Nutrition | Custom Rings |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | 4.4 (7 ratings) |
| Positive reviews | 100.0% of reviews — better | 75.0% of reviews |
| Number of ratings | 1 | 7 — better |
| Update frequency | Every 9 days | Every 4 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Subscription | Freemium — better |
| Devices | iPhone | iPhone, Apple Watch — better |
| Requires iOS | 18.0 | 17.0 — better |
| Further details — not scored | ||
| Size | 30 MB | 10 MB |
| Age rating | 4+ | 12+ |
| Developer | Thomas Golio | Christopher DAdamo |
Customer experience
CPR Nutrition
Custom Rings
In-app purchases
CPR Nutrition
- CPR Nutrition Yearly3 Days trial$29.991 Year
Custom Rings
- Custom Rings Pro$2.99









