Type like you talk. Logged in one message.
"2 fried eggs and toast" is all it takes. 0xCal parses it and logs calories, carbs, fats, and protein in one flow — no database digging, no barcode hunting.
New Fasting tracking just landed
Calorie tracking that doesn't feel like homework.
Snap a meal photo or just type what you ate. 0xCal logs calories and macros in seconds — a clean, native iPhone experience you'll actually want to open every day.
- Photo + chat logging
- Apple Health sync
- No ads, no clutter
Built for fast logging and long-term consistency.
Everything focuses on less friction, better adherence, and a premium iOS feel.
Photo-based calorie logging
Take a quick photo of your plate and get a smart macro estimate instantly. Add context when needed for even tighter accuracy.
Fasting, built in
Track your fasting windows alongside your meals — one app for eating and not eating.
Syncs with your day
Steps, weight, and dietary energy flow both ways with Apple Health — your burn adjusts your budget.
No ads. No clutter. No homework.
A clean, monospace interface designed for people who care how their tools look and feel. Open it, log, get on with your life.
What tracking looks like in 0xCal
From quick meal capture to daily progress, every screen is built to reduce friction.
Questions, answered.
How does 0xCal log calories from a photo?
Take a photo of your plate and 0xCal's AI identifies the foods, estimates portions, and returns calories, protein, carbs, and fat in seconds. You can add a short text note for even tighter accuracy.
Can I log food just by typing?
Yes. Type what you ate in plain English — like "2 fried eggs and toast with butter" — and 0xCal parses it into a full calorie and macro breakdown. It handles typos and misspelled brand names too.
How accurate is 0xCal?
0xCal publishes weekly public benchmarks testing 72 foods against USDA reference data. See the full methodology and per-food results on the benchmarks page.
Does 0xCal sync with Apple Health?
Yes. Steps, weight, and dietary energy flow both ways with Apple Health, and your activity adjusts your daily calorie budget.
Does 0xCal track fasting?
Yes. Fasting window tracking is built in, so you can manage eating and fasting periods in the same app.
Is 0xCal a good Cal AI alternative?
Yes. Cal AI was removed from the App Store in April 2026 for bypassing Apple's payment system. 0xCal offers the same AI photo logging plus natural language input, with transparent Apple billing. Read the full comparison.
Is 0xCal free? Do I need an account?
0xCal offers a free trial with all features included, then one simple subscription — no tiers, no ads. No account is required, billing runs through Apple, and you can cancel anytime in iPhone Settings.
Track smarter with less effort.
0xCal is available on iPhone at founders pricing — one subscription with trial, all features included.
