MetricSync vs Fasting Tracker
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
MetricSync
Effortlessly track your nutrition with AI-powered food recognition. Simply snap a photo of your meal to get instant calorie and macro breakdowns. Ideal for fitness enthusiasts, those managing diabetes, or anyone aiming for a healthier diet.
- AI food scanning with photo recognition
- Multiple logging options (photo, barcode, voice, manual)
- AI assistant for personalized nutrition advice
- Diabetic tools (insulin calculator, glucose tracking)
- Apple Health integration
- Fitness and progress tracking
- Visual progress rings and streaks
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MetricSync makes nutrition tracking effortless with AI-powered food recognition. Snap a photo of any meal and get instant calorie and macro breakdowns—no manual entry required. Whether you're managing diabetes, tracking fitness goals, or just trying to eat healthier, MetricSync gives you the tools to stay on track without the hassle. AI FOOD SCANNING Point your camera at any meal and MetricSync's AI instantly identifies foods and calculates nutrition: • Recognizes individual food items on your plate • Calculates calories, protein, carbs, fats, and fiber • Estimates portion sizes from visual cues • Works with homemade meals, restaurant food, and meal prep MULTIPLE TRACKING OPTIONS • Photo scanning – AI analyzes any meal in 3 seconds • Barcode scanner – Instant lookup from USDA database with 300,000+ foods • Nutrition label scanner – Offline OCR extracts data from any package • Voice logging – Hands-free tracking while cooking • Manual search – Full food database access HEALTHSYNC AI ASSISTANT Ask your personal health AI anything: • "Why am I always hungry after breakfast?" • "Is my protein intake too low?" • "Should I adjust my macros for rest days?" Get personalized answers based on your actual tracked data, goals, and progress. The AI knows your nutrition patterns, workout history, and health metrics to give you relevant advice. BUILT-IN DIABETIC TOOLS MetricSync includes medical-grade features for diabetes management: Insulin Dose Calculator • Customizable insulin-to-carb ratio (ICR) • Correction factor settings • Target blood glucose configuration • Automatic dose recommendations for every meal • Carb dose + correction dose calculations Glucose Tracking • Manual blood glucose logging • Meal context tracking (fasting, before meal, after meal, bedtime) • Glucose trend visualization • Target range monitoring A1C Management • Lab result tracking • Estimated average glucose (eAG) calculations • Historical A1C trends Basal Insulin Tracking • Long-acting insulin dose reminders • Nighttime dosing schedules • Treatment notes and adjustments APPLE HEALTH INTEGRATION MetricSync syncs bidirectionally with Apple Health: Reads from Health: • Steps and distance • Workouts and active calories • Sleep hours • Heart rate and resting heart rate • Water intake • Body measurements Writes to Health: • Logged workouts with duration and calories • Exercise sessions with metadata Your burned calories automatically adjust your daily calorie budget (optional setting). FITNESS & PROGRESS TRACKING • Log workouts with duration, type, and calories burned • Track weight with trend charts. • BMI calculator with status categories • Daily macro goals (protein, carbs, fats, fiber) • Visual progress rings for all nutrients • Streak tracking for accountability • Historical data browser to view any past date https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Fasting Tracker
This app provides structured tracking for intermittent fasting, going beyond simple timers. It helps users follow specific fasting schedules with clear phase progress, build consistency through streaks, and manage a flexible weekly plan. Focuses on discipline and reducing guesswork for a clearer fasting experience.
- Track various fast types (16:8, OMAD, extended)
- Live phase-by-phase progress tracking
- Build streaks from completed fasts
- Flexible weekly fasting schedule
- Review fasting history
- Ask fasting questions with reviewed answers
- Siri and Shortcuts integration
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Fastology is a fasting tracker for people who want more than a timer. Fasting works when it is structured. Fastology helps you track 16:8, 18:6, OMAD, and extended fasts with clear phase progress, streaks that reflect completed fasts, and a weekly schedule that fits real life. Most fasting apps count hours. Fastology helps you follow through. WHY FASTOLOGY Structured, not reactive Follow a clear fasting rhythm instead of making it up as you go. See where you are Track each phase of the fast with live progress, so you always know where you stand and what comes next. Consistency over intensity Build streaks from completed fasts and focus on repeatability, not random extremes. Flexible weekly schedule Set your fasting rhythm for the week, then adjust specific days when life changes. Clear, focused experience No clutter. No noise. Just the tools that matter when you want to fast with more discipline and less guesswork. WHAT YOU CAN DO • Track 16:8, 18:6, OMAD, and extended fasts • Follow live phase-by-phase progress • Build streaks from completed fasts • Set a weekly schedule and adjust specific days • Review your fasting history over time • Ask fasting questions with reviewed answers and linked sources • Start a fast, check your phase, or search Fastology from Siri, Spotlight, Shortcuts, and Ask • On supported devices, use Apple Intelligence to explore your fasting history Fastology is built for people who want to fast with more clarity, more structure, and more follow-through.
Screenshots
Verdict
The clearest difference is rating: Fasting Tracker at 4.9 against MetricSync's 4.0. Fasting Tracker also leads on in-app purchases (none vs 2) and review sentiment (100% vs 75%). MetricSync's advantage is update cadence (every 5 days vs every 3 weeks). On price, ads, device support and iOS requirement 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. MetricSync sells 2 in-app purchases, starting at $7.99 per month. Fasting Tracker asks for nothing beyond the download.
Fasting Tracker holds the better App Store score, 4.9 against 4.0. Both are backed by a comparable volume of ratings — 4 and 15 respectively. Written reviews point the same way: 75% of MetricSync's written reviews are positive against 100% of Fasting Tracker's.
MetricSync ships an update every 5 days, Fasting Tracker every 3 weeks. Both last shipped on November 5, 2026.
| Parameter | MetricSync | Fasting Tracker |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (4 ratings) | 4.9 (15 ratings) — better |
| Positive reviews | 75.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 4 | 15 — better |
| Update frequency | Every 5 days — better | Every 3 weeks |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone | iPhone, Apple Watch — better |
| Requires iOS | 18.2 | 17.0 — better |
| Further details — not scored | ||
| Size | 123 MB | 40 MB |
| Age rating | 17+ | 4+ |
| Developer | Aura Technologies LLC (U.S.) | SmallScale Works LLC |
Customer experience
MetricSync
Fasting Tracker
In-app purchases
MetricSync
- MetricSync Monthly$7.991 Month
- MetricSync Yearly$30.001 Year
Fasting Tracker
No in-app purchases
Questions
Is MetricSync free?
Is Fasting Tracker free?
Which has better reviews, MetricSync or Fasting Tracker?
Do MetricSync or Fasting Tracker have ads?
Which is updated more often, MetricSync or Fasting Tracker?
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