SnapNutrition AI — AI Calorie Tracking Without a Mandatory Subscription
Snap a photo. Get calories and macros in seconds.
Use your own AI key or choose optional Auto Mode. No ads. No SnapNutrition account.
SnapNutrition AI is a food diary for iPhone, iPad, and Apple Watch. Log a meal by photo, barcode, voice, text, or manual entry, then track calories and macros across your Apple devices.
In free BYOK mode, you connect your own Google Gemini, OpenAI, Anthropic, or OpenRouter key. Gemini and OpenRouter offer free tiers; paid providers charge you directly for usage. If you prefer no API-key setup, optional Auto Mode costs $2.99/month or $29.99/year. No SnapNutrition account is required, though creating an API key may require an account with that provider.
See SnapNutrition AI in Action
Try every core tracking feature without a mandatory subscription.
Log Food Your Way
Photo & Gallery Scanning
Take a new food photo or choose one from your library to estimate calories, protein, carbs, and fat.
Barcode & Manual Entry
Look up packaged foods by barcode, or enter known nutrition values by hand without making an AI request.
Voice, Text & Share Sheet
Describe a meal, speak it aloud, or share a food photo from another app. Siri Shortcuts cover common hands-free actions.
Goals & Progress
Set calorie and macro targets, import profile details from Apple Health, and review daily, weekly, or all-time trends.
Watch, Widgets & Shortcuts
Log from Apple Watch and check progress through Home Screen, Lock Screen, Control Center, and Watch complications.
Sync & Export
Sync through your personal iCloud account and export your diary as JSON or CSV whenever you want.
How It Works
Add Your API Key
Choose Google Gemini, OpenAI, Anthropic, or OpenRouter. Free tiers are available, while paid usage is billed by the provider.
Snap Your Food
Take a photo, scan a barcode, type, or speak. The AI food scanner works however you prefer.
Track Progress
Set a daily goal and follow your calorie and macro trends over time.
Flexible by Design
Choose How AI Is Paid For
Use a free-tier or paid BYOK provider, or choose Auto Mode for a simpler setup. Core tracking is not locked behind Auto Mode.
No SnapNutrition Account
Your diary stays on your device or in your personal iCloud. BYOK requests go directly to the provider you choose.
Made for Different Routines
Choose metric or imperial units and use the app in any of 11 supported languages.
A Note on Accuracy
AI calorie estimates are best used for fast, consistent food logging, not laboratory-grade nutrition measurement. Portion size, hidden oils, and mixed dishes can affect results, so SnapNutrition AI lets you edit portions and combine photo, barcode, voice, and text input. Learn more about how accurate AI calorie counters really are.
Frequently Asked Questions
What does SnapNutrition AI cost?
The app has no mandatory subscription. In BYOK mode, Gemini and OpenRouter offer free tiers; paid providers bill you directly for AI usage. Optional Auto Mode costs $2.99/month or $29.99/year after a 3-day trial. Provider pricing and free-tier availability can change.
How does the AI food scanner work?
Simply take a photo of your food, and the AI analyzes the image to identify ingredients and estimate calories, protein, carbs, and fat. You can also scan barcodes, type a description, use voice input for hands-free tracking, share a photo in from another app, or enter a meal manually when you already know the numbers.
How accurate is AI calorie counting?
AI calorie estimates are typically within 10-30% accuracy depending on portion sizes and preparation methods. SnapNutrition AI displays this disclaimer and allows you to manually adjust portions and ingredients for better accuracy. Read more about what AI calorie counters can and can't do.
Is my data private?
Yes. Your meal data stays on your device (with optional iCloud sync). In BYOK mode, food images go directly from your device to whichever provider you picked — Google, OpenAI, Anthropic, or OpenRouter — and we operate no backend and never see your data. In the optional Auto Mode subscription, requests pass through a minimal Cloudflare-hosted proxy that verifies your subscription and forwards the photo to OpenAI; we never store food photos. You can export your whole diary as JSON or CSV at any time. See our Privacy Policy for full details.
What API key do I need?
Any of four: Google Gemini, OpenAI, Anthropic (Claude), or OpenRouter. Gemini is the easiest starting point because it has a free tier — create a key at aistudio.google.com, paste it in, and you can scan without paying anyone. OpenRouter also has a free tier. The app marks which providers are free while you're choosing, so you don't have to research it first.
What is BYOK (Bring Your Own Key)?
BYOK stands for Bring Your Own Key. Rather than requiring a subscription, SnapNutrition AI lets you use your own API key from Google Gemini, OpenAI, Anthropic, or OpenRouter. You pay the AI provider directly for usage — typically $0.01-0.03 per food scan, or nothing at all on Gemini's or OpenRouter's free tier. This model makes the app free to use while giving you access to the latest AI models. (For users who'd rather skip the API-key setup, an optional Auto Mode subscription is also available.) Read our full guide to the BYOK calorie tracker model.
Can I use SnapNutrition AI on iPhone, iPad, and Apple Watch?
Yes, SnapNutrition AI is available on iPhone, iPad, and Apple Watch with iCloud sync across all your Apple devices. The Watch app lets you log calories by voice and view your daily progress right from your wrist. An Android version is not yet available.
Ready to try faster food logging on your Apple devices?
Learn More About AI Calorie Tracking
Best Free AI Calorie Trackers
What “free” actually means across SnapNutrition AI, SnapCalorie, Cal AI, and MyFitnessPal in 2026.
BYOK Calorie Tracker
What Bring Your Own Key means, what it costs per day, and why it can beat subscriptions.
AI Calorie Counter Accuracy
What photo food scanners can and can't do — common failure modes and how to get better results.
MyFitnessPal Alternative
An honest comparison of SnapNutrition AI, MyFitnessPal, Cronometer, Lose It!, and Cal AI.
Cal AI Alternative
Both scan food by photo. One needs a subscription to work at all — here's the honest difference.
SnapCalorie Alternative
Compare free daily scans with BYOK, local diary storage, export, and Apple Watch support.
Privacy-First AI Tracking
Follow the path of food photos, account data, local storage, AI providers, and analytics.
Your Privacy Matters
No SnapNutrition account is required. Your meal logs, goals, and history stay on your device and sync only through your personal iCloud account.
BYOK mode: Food images and text descriptions go directly from your device to your chosen AI provider (Google Gemini, OpenAI, Anthropic, or OpenRouter) using your own API key. No proxy, no backend touch — we never see or store your data. Your diary exports to JSON or CSV whenever you want it.
Auto Mode (optional subscription, $2.99/month or $29.99/year with a 3-day free trial): Requests pass through a minimal Cloudflare-hosted proxy that verifies your Apple subscription, runs Apple App Attest for device integrity, and enforces a fair-use daily scan limit. Food photos are forwarded to OpenAI for analysis and not stored on our side. We retain limited pseudonymous operational telemetry for rate limiting and abuse prevention; it contains no food content, name, or email address.
Full details in our Privacy Policy.
SnapNutrition AI is for general food logging and wellness support. It is not medical advice and should not replace guidance from a doctor or registered dietitian.