rex.fit
AI calorie tracker that logs your meals via WhatsApp photos or text, plus workout tips and AI body scanning.
| What is it | AI calorie tracker that logs your meals via WhatsApp photos or text, plus workout tips and AI body scanning. |
|---|---|
| Pricing | Paid |
| Platform | Web Application |
| API | Yes |
| Best for | logging meals hands-free by sending a photo to WhatsApp, getting personalized workout recommendations |
| Domain registered | 2023 |
Data updated Aug. 1, 2026
What does rex.fit do?
Rex is an AI-powered nutrition tracker that lives inside WhatsApp. Instead of opening a separate app and manually typing every ingredient, you just snap a photo of your plate or type what you ate — like texting a friend. It automatically logs calories, protein, fats, and carbs. You can also ask for workout suggestions or get a daily report with personalized feedback on your diet and habits.
The magic is in how simple it feels. No complicated dashboards or barcode scanning. Rex uses computer vision to recognize food from photos and natural language processing to understand text descriptions. It also offers an AI body scanner that estimates body composition metrics as an alternative to BMI. The tool sends you daily report cards, which users say helps with accountability — knowing you'll see a summary at the end of the day can be a nudge to make better choices.
Rex is best for anyone who hates manual calorie tracking but wants to stay on top of their nutrition. People trying to lose weight, gain muscle, or just eat more mindfully will find it useful. It's also a good fit for those who prefer WhatsApp as their main messaging app and want a coach-like experience without downloading another dedicated app. The hardware wearable "The Drop" is a separate product — this review focuses on the AI chatbot itself.
Key features
What makes it stand outWho is rex.fit for?
Who benefits most from this toolTrust & presence
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