Track what you eat, how long you fast, and how your meals affect your glucose — all without an account, cloud sync, or ads. Everything stays on your iPhone.
LOG FOOD IN SECONDS
Search 500,000+ foods from the USDA database — stored entirely on-device, no internet needed. Scan a barcode and get instant nutrition data from the Open Food Facts database. Snap a photo of your meal and let on-device AI identify the food and fill in the macros. Or just type it in manually.
Every entry shows calories, protein, carbohydrates, and fat. Set your daily targets and watch your rings fill as you log.
FASTING TRACKER — PREMIUM
MacroFast automatically calculates your fasting window from the last meal you logged. No timers to start or stop. See your current fast length, your fasting zone, and your full fasting history at a glance. Black coffee, water, and zero-calorie items can be marked to exclude from your fast.
GLUCOSE INSIGHTS — PREMIUM
Connect a continuous glucose monitor via Apple Health and see how your meals affect your blood sugar. MacroFast draws a 24-hour, 3-day, or 7-day trend chart directly from your Apple Health data — on-device, never uploaded. Set a personal in-range goal and track your time within it.
Supports both mg/dL and mmol/L. Units are detected automatically from your Apple Health settings.
Note: Glucose Insights is a personal wellness tool. It is not a medical device and does not provide medical advice. Always consult your healthcare provider for clinical guidance.
HISTORY & TRENDS — PREMIUM
A full calendar view of every day you've logged. Tap any date to see your totals, meal breakdown, and fasting window for that day. Weekly and monthly charts show your calorie and macro trends over time.
APPLE HEALTH INTEGRATION
MacroFast can optionally write your logged meals — calories, protein, carbohydrates, and fat — to Apple Health so they appear alongside your other health data. This is off by default and can be toggled in Goals at any time.
PRIVACY BY DESIGN
No account. No sign-in. No cloud. No ads. No tracking.
All your food entries, macro history, fasting records, and glucose data stay on your device in Apple's encrypted on-device storage. Barcode lookups are anonymous. The USDA food database is bundled in the app — it never phones home.
PREMIUM SUBSCRIPTION
MacroFast Premium unlocks:
· Fasting Tracker with zone history
· Glucose Insights with trend charts
· Full History calendar
· Weekly and monthly macro charts
Basic calorie and macro logging is always free, forever.
MacroFast is not a medical device. Calorie targets, fasting zones, and glucose goal ranges are personal wellness goals you configure — not clinical recommendations. Consult a qualified healthcare provider before making changes to your diet or when interpreting health data.
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