Close your Calories, Protein and Carbs rings every day
An Apple-Watch-style daily nutrition tracker. Search real food data from the free USDA FoodData Central database, or add your own custom foods, log what you eat against Breakfast, Lunch, Dinner or Snack, and watch three concentric rings - Calories, Protein and Carbs - fill toward your daily targets and close when you hit them.
Calories, Protein and Carbs each get their own concentric ring that fills toward your daily target and visually closes at 100% - the same "close your rings" idea as an Apple Watch's Activity rings, built for food instead of movement.
Search the free, public USDA FoodData Central database - no paid nutrition API, no signup required. Works out of the box with the public DEMO_KEY, or add your own free key for higher search limits.
Add homemade meals or products USDA doesn't have as a custom food with its own serving size and macros - it shows up in the food picker alongside USDA search results every time you log a meal.
Every logged item sits under Breakfast, Lunch, Dinner or Snack on the Today view, so you can see at a glance where today's calories and macros are actually coming from.
Any day where all three rings close counts toward a running streak, shown right in the middle of the rings on the Today view and again on the History tab.
Browse the last 14 days with a per-day calorie ring fill and item count, and see your 7-day average calories, protein and carbs at a glance on the History tab.
Set your own daily Calories, Protein, Carbs and Fat targets in Settings - every ring, stat card and status pill in the app is driven entirely by the targets you choose.
Export your full food log to CSV whenever you want a copy outside the app, or to bring your history into a spreadsheet for your own analysis.
Your foods, log entries and targets are all stored locally on your device. The only network calls are food searches against the USDA API - there's no server-side account for your nutrition data.
Switch between a light or dark theme that remembers your choice, so the rings read comfortably whatever the time of day.
A personal food and macro log only - not medical, dietetic or clinical nutrition advice. It doesn't replace guidance from a registered dietitian or doctor.
Load a few days of sample foods and log entries with one click to see the rings, meal groups and history populated before you log a single real meal.
Most people either use a large calorie-counting app with ads and a subscription paywall, or track meals in a spreadsheet by hand. Here's how a focused rings tracker compares.
| Feature | Metre2 Nutrition Ring Tracker | A large calorie-counting app (e.g. MyFitnessPal free tier) | Tracking in a spreadsheet |
|---|---|---|---|
| Pricing model | One-off low price, no ads | Free tier with ads, premium subscription for more features | Free |
| Visual daily-target rings | ✓ (3 concentric rings) | ✕ (progress bars, not rings) | ✕ |
| Free nutrition database search | ✓ (USDA FoodData Central) | ✓ (own database, mostly user-submitted) | ✕ (manual entry) |
| Streak tracking | ✓ | Varies, often premium-tier only | ✕ |
| Data stays on your device | ✓ | ✕ (cloud account required) | ✓ |
| CSV export | ✓ | Varies, often premium-tier only | ✓ (it is one) |
General comparison as of August 2026. Not affiliated with MyFitnessPal, USDA, or Apple.
The free, public USDA FoodData Central database - no paid nutrition API, no signup required. The app works out of the box using the public DEMO_KEY, or you can add your own free API key from api.data.gov for higher search limits.
Calories, Protein and Carbs - each ring fills toward your daily target and visually closes when you hit it, the same close-your-rings idea as an Apple Watch's Activity rings, applied to nutrition instead of movement.
Yes. Add any homemade meal or product as a custom food with its own serving size and calories/protein/carbs/fat per serving, and it appears in the food picker alongside USDA search results every time you log a meal.
No. It's a personal food and macro log only - not medical, dietetic or clinical nutrition advice, and it doesn't replace guidance from a registered dietitian or doctor.
Yes. Any day where all three rings close counts toward a running streak, shown on the Today view and the History tab, so you can see how many days in a row you've hit your targets.
Your foods, log entries and targets are all stored locally on your device. The only network calls are food searches against the USDA FoodData Central API - there's no server-side account for your nutrition data.