Fit vs Carbon
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Fit
Visually monitor your fitness journey by combining weight logging with progress photos. See subtle body changes, create before & after comparisons, and stay motivated with reminders. Your data stays private on your device.
- Track weight and visual body changes
- Combine weight and progress photos
- Offline-first data storage
- Before & after comparison tool
- Progress tracking reminders
- Optional iCloud backup
Read full descriptionHide full description
Your weight doesn't tell the whole story. You could lose fat and gain muscle and the scale won't budge. That's why photos matter — they show what's actually changing. Fit-Stitch pairs weight tracking with progress photos so you can see the full picture, not just a number. What it does: - Track your weight and take progress photos over time - Tag your snapshots and photos to organize your progress - Create side-by-side comparisons to spot changes you'd otherwise miss - Sync across your devices with iCloud — your data goes to your own private account, never ours - Lock the app with Face ID or Touch ID for extra privacy - Set reminders so you remember to track consistently Your data stays yours. Your photos and data live on your device. No accounts, no ads, no data collection. If you turn on iCloud sync, it goes to your own private iCloud — we never see it. Built by two indie devs, not a corporation. We're responsive, and we actually read our messages. If something's broken or you have an idea, reach out — we'd love to hear from you.
Carbon
This app acts as a personalized nutrition coach, helping you track your food intake and weight to adjust your calorie and macro targets. It provides weekly check-ins with clear explanations for any changes made to your plan, supporting various dietary goals like fat loss or muscle gain.
- Adaptive macro coaching
- Personalized calorie and macro targets
- Weekly weight trend analysis
- Flexible calorie planner
- Smart food logging with photo recognition
- Support for various diet styles
Read full descriptionHide full description
The macro tracker that coaches you. Carbon Diet Coach is a nutrition coach and calorie tracker in one. Log your food, weigh in, and check in once a week. Carbon reviews your weight trend and what you logged, decides whether your targets should change, and explains every decision. Carbon pioneered adaptive macro coaching, and thousands of members use it to lose fat, build muscle, maintain, and reverse diet. HOW WEEKLY COACHING WORKS • Answer a few questions about your goal, body, and preferences • Get personalized calorie, protein, carb, and fat targets • Log your food and weigh in, or sync your weight from Apple Health • Check in weekly. Carbon looks at your multi-week weight trend and what you actually logged, then adjusts your macros or holds them steady • Read a clear check-in report, so you're never left wondering why Carbon did or didn't make a change • Pick your check-in day, or check in early when your schedule changes PROTEIN BUILT AROUND YOU Your protein target is based on your lean body mass, with an optimal range for your goal and diet style. Research links higher protein intake during fat loss to keeping more lean mass, so Carbon keeps protein front and center all week. FLEXIBLE CALORIE PLANNER The Calorie Planner works like a weekly calorie budget. Give yourself more calories for weekends, dinners out, and events, and fewer on quieter days, while your week stays on target. • Finished days reflect what you actually tracked, and the rest of your week rebalances around them • Hold protein keeps your protein target steady while daily calories shift • Adjust calories, protein, carbs, and fat for any upcoming day, or reset a day to your weekly defaults COACHING WITH GUARDRAILS When progress stalls, Carbon makes small changes instead of big cuts, keeps your rate of loss in check, and sets a calorie floor for you. If you reach it, Carbon recommends a switch to maintenance or a reverse diet. If your week wasn't fully tracked, Carbon won't react to incomplete data. SMART LOGGING Smart Logger: snap a photo of your meal or describe it, and Carbon matches each food to an entry in our verified food database. You review the matches, confirm your servings, and log the whole plate at once. Smart Suggestions: foods you log often are pre-filled in your diary. Tap to confirm or skip. Remaining Macros: see what's left for the day and preview how a food fits before you log it. Serving Amount Solver: enter the macros you have left and Carbon finds the serving that fits. Plus a barcode scanner, nutrition label scanner, quick add, copy meals, favorites, and custom foods and recipes. GOALS AND DIET STYLES Fat loss, muscle gain, weight maintenance, and reverse dieting. Choose Balanced, Low Carb, Low Fat, Keto, Plant-Based, or High Protein then fine-tune each macro within recommended ranges. PROGRESS YOU CAN SEE Charts for weight, body fat, lean body mass, calories, macros, and estimated metabolic rate, plus a check-in history showing every adjustment and why. ALREADY HAVE YOUR OWN TARGETS? Use Carbon as a macro, protein, and nutrition tracker, calorie counter, and food log. SUPPORT FROM REAL PEOPLE Questions go to Carbon's support team, and members share tips in our private community. BUILT ON EVIDENCE Created by Dr. Layne Norton (PhD, Nutritional Sciences) and Keith Kraker, RD. SUBSCRIPTIONS Monthly, 6-month, and yearly plans. Every plan includes full access to all features. Your subscription renews automatically unless auto-renew is turned off at least 24 hours before the end of the current period. You can manage or cancel your subscription in your Apple Account settings. Payment is charged to your Apple Account when you confirm your purchase. Food database powered by FatSecret: https://fatsecret.com Terms and Conditions: https://joincarbon.com/terms-and-conditions/ Privacy Policy: https://joincarbon.com/privacy-policy/
Screenshots
Verdict
The clearest difference is price: Carbon at Free against Fit's $4.99. Carbon also leads on update cadence (weekly vs every 2 months) and ratings volume (8.2K vs 331). Fit's advantage is in-app purchases (none vs 9). On rating, review sentiment, ads 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
Carbon is free to download; Fit costs $4.99 up front. Carbon sells 9 in-app purchases, starting at $11.99 per month. Fit asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 4.8 for Fit against 4.8 for Carbon. That said, the two scores are not equally well evidenced: Carbon has 8.2K ratings behind it against 331, so its average is the more settled of the two. Written reviews split almost evenly too, at 79% and 79% positive.
Fit ships an update every 2 months, Carbon weekly. The most recent releases landed on November 6, 2026 and November 10, 2026 respectively.
| Parameter | Fit | Carbon |
|---|---|---|
| Price | $4.99 | Free — better |
| Rating | 4.8 (331 ratings) | 4.8 (8.2K ratings) — better |
| Positive reviews | 78.5% of reviews | 79.3% of reviews — better |
| Number of ratings | 331 | 8.2K — better |
| Update frequency | Every 2 months | Weekly — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Best chart rank | — | #99 — better |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 17.0 | 16.6 — better |
| Further details — not scored | ||
| Size | 26 MB | 105 MB |
| Age rating | 4+ | 17+ |
| Developer | REDSHIFT SYSTEMS INC. | Reform LLC |
Customer experience
Fit
Carbon
User reviews
Fit
From 331 App Store ratingsWhat we love
- 🚀 Best tracker
- 🔒 Password protection
- 👍 Easy to use
- 👍 Simple and cool
- 👍 Motivating
Room to improve
- 🐛 Lacks features like resizing photos, labeling, and ghost images
- 🐛 Crashes and bugs
- 🔒 No password recovery
- 👎 Not user-friendly
- 👎 Locked picture app, not worth the price
Carbon
From 8.2K App Store ratingsWhat we love
- 🚀 Easy to use
- 👍 Flexible and customizable
- 🔍 Accurate food database
- 💡 Helpful coaching and adjustments
- 🤝 Responsive customer support
Room to improve
- 🐛 Limited food database for some regions
- 🤔 Strict adherence required for adjustments
- 🤷♀️ Lack of exercise tracking integration
Bugs and requests
Fit
Reported bugs
3 issues- Crashes when trying to upload photos
- Unable to set reminders or update weight
- Lost progress photos after device change
Requested features
5 requests- Add ability to add notes to progress pictures
- Improve before/after layout and allow more than 2 photos
- Add option to organize photos by date into albums
- Implement landscape mode
- Add ability to input measurements
Carbon
Reported bugs
2 issues- Occasional app crashes or freezes
- Issues with resetting account data
Requested features
4 requests- Add water intake tracking
- Improve barcode scanning functionality
- Allow more flexibility in macro adjustments
- Integrate with fitness trackers
In-app purchases
Fit
No in-app purchases
Carbon
- Monthly Subscription$11.991 Month
- Monthly Subscription7 Days trial$11.991 Month
- Monthly Subscription14 Days trial$11.991 Month
Show 6 moreShow fewer
- Six Month Subscription$59.996 Months
- Six Month Subscription7 Days trial$59.996 Months
- Six Month Subscription14 Days trial$59.996 Months
- Yearly Subscription$99.991 Year
- Yearly Subscription7 Days trial$99.991 Year
- Yearly Subscription14 Days trial$99.991 Year









