Your goals.
Never paywalled.
Most trackers charge you to change your own protein goal. Macronaut doesn’t. Editable macro goals, barcode scanning, and Apple Health sync are free — the way they should be.
Requires iPhone · iOS 18 or later
Track smarter, not pricier
Powerful tracking that respects your wallet and your data. The essentials are free — AI superpowers are an optional upgrade.
Editable macro goals
Set and change your calorie, protein, carb, and fat targets whenever you want — cutting, bulking, or just dialing it in. No subscription. No upsell screen between you and your own numbers.
- ✓ Custom gram or percentage splits
- ✓ Per-day and per-meal targets
- ✓ Stored privately on your device
Barcode scanning
Point your camera at any packaged food and Macronaut pulls the full nutrition panel in a tap — powered by the 3M+ product Open Food Facts catalog with USDA generic foods as a fallback.
- ✓ Instant lookups, cached for speed
- ✓ Generic & whole foods from USDA
- ✓ Adjust serving size before logging
AI photo logging
Snap a picture of your plate and let Macronaut estimate the calories and macros for you. Great for restaurant meals and home cooking where there’s no barcode in sight.
- ✓ Identifies foods and portions from a photo
- ✓ Editable estimate before you log
- ✓ Photos processed, never used for training
AI voice logging
Just say what you ate. “Two eggs, a slice of sourdough, and a black coffee” — Macronaut transcribes it, parses the foods, and logs the macros. The fastest way to track, hands-free.
- ✓ Speak naturally — no rigid commands
- ✓ Handles multiple foods in one sentence
- ✓ Audio processed, never used for training
Apple Health sync
Macronaut reads your steps, workouts, and active energy from Apple Health to give you the full picture — and writes the calories and macros you log back so your whole health story stays in one place.
- ✓ Reads steps, workouts & active energy
- ✓ Writes dietary energy & macros back
- ✓ You control every permission
Free where it counts
Core tracking is free forever. Upgrade to Macronaut Plus only if you want AI photo and voice logging — the features that actually cost us to run.
Free
Everything you need to track every day.
- ✓ Editable calorie & macro goals
- ✓ Barcode scanning (3M+ products)
- ✓ Manual & quick-add logging
- ✓ Apple Health sync (read & write)
- ✓ Daily macro rings & history
Macronaut Plus
Everything in Free, plus AI logging.
- ✓ AI photo logging — snap your plate
- ✓ AI voice logging — just say what you ate
- ✓ Faster, hands-free tracking
- ✓ All free features included
Subscriptions are billed through your Apple ID and renew automatically until cancelled. See Terms.
Start tracking in 60 seconds
Download Macronaut, set your goals, and log your first meal — free.