AI calorie tracking with a sarcastic gym buddy who actually keeps you accountable — without the spreadsheet vibes of every other tracker.
Free to track · AI features included with RexWithYou trial
Point the camera at the plate. OpenAI vision parses every ingredient — quinoa, avocado, egg, the spinach hiding under the chicken — gram for gram, in under three seconds. No barcode hunt. No manual entry slog.
Generic AI coaches read like LinkedIn — Rex reads like your worst friend. Sarcastic by design, remembers what you logged yesterday, never lectures the same way twice. The character is the product.
Pull a weekly plan in one tap, built around your goal, allergies and dietary style. The shopping list generates from the plan. No more 3pm 'what's for dinner' negotiations with yourself.
Calories, macros, weight, steps, water — one ring you read each morning.
Speak it or type it. Whisper transcribes, Rex parses, you confirm.
Ingredient by ingredient — protein, carbs, fat, % of plate.
Search, filter, favourite. Eat good, not boring.
Generated from your plan, grouped by aisle, voice-add anything.
Streak, weight curve, calorie trend — watch yourself win.
"Two burgers. And a coke. Bold strategy for wrecking your form. Relax — one lunch won't end your career. We fix dinner at home, deal?"
Sarcastic by design. Remembers what you logged yesterday. Never lectures the same way twice. The character is the point — not the bullet points.
Photo recognition uses OpenAI's vision model and typically lands within ±15% of true calories for plated meals. For packaged food, scan the barcode or speak the name — that's near-exact. You can always edit before saving.
No. We never sell your personal information and show no third-party ads. We use analytics to improve the app, but your health, meal, photo, voice, and chat data is never used for advertising and never shared for marketing — held to Apple HealthKit's privacy rules. Full detail in our Privacy Policy.
Core tracking, water, weight and streaks are free. AI features (chat, photo scan, voice, meal plans) are part of RexWithYou — the paid tier — with a 7-day trial when you sign up. Pricing shown in-App before any charge.
Rex knows the dish, not just the macros. Sushi vs ramen vs grain bowl get different advice because the contexts are different. He remembers your goal and reads the week, not the meal.
Available on the App Store and Google Play. Download links are at the top and bottom of this page.
No. RexWithYou is a tracking and coaching app, not a medical device. If you have a clinical condition (diabetes, eating-disorder history, pregnancy), talk to your doctor before using any nutrition app — Rex included.
Install free. Trial RexWithYou's AI features for 7 days. Cancel anytime from your phone settings.