kitio.aiJanuary AI vs Rex.fit
A side-by-side look at pricing plans, free tiers, features, pros and cons, updated for 2026. January AI starts at $99/mo and Rex.fit starts at See pricing page. Check both pricing pages for current plans.
Health data API for meal scanning and glucose prediction without a sensor
Freemium · $99/moAt a glance
Best for
Pricing model
Starting price
Free plan
Made by
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Rating
Key features
- Meal Scan
- Device-free glucose prediction
- Health Context Engine
- Food search
- Clinician dashboard
- API credits
- Meal logging from photos
- WhatsApp coach
- Workout suggestions
- Nutrition tracking API
- Free meal plan
| Feature | January AI | Rex.fit |
|---|---|---|
| Best for | Health data API for meal scanning and glucose prediction without a sensor | AI calorie tracking from a WhatsApp chat or a wearable |
| Category | Legal, finance & HR | Legal, finance & HR |
| Pricing model | Freemium | Freemium |
| Starting price | $99/mo | See pricing page |
| Free plan | Yes | Yes |
| Made by | January AI | Re.fit |
| Based in | – | – |
| Rating | No ratings yet | No ratings yet |
| Key features |
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Pricing compared
January AI starts at $99/mo and Rex.fit starts at See pricing page. Check both pricing pages for current plans.
Free plan
Cheapest paid plan
Top plan
Free trial
3 plans
Free
Free
- 3 API keys
- 1,000 API credits
- Discord community support
Pro
$99/mo
- 10 API keys
- 10,000 credits per month
- Email and Slack support
Startup
$749/mo
- 100k credits per month
- Unlimited API keys
- HIPAA and SOC 2 Type II
- Zero data retention
Prices in USD, checked Oct 29, 2026 or later. Plans change often, so confirm on each tool's site before you buy.
Pros and cons
January AI
- Free tier to test the API
- Large food and recipe database
- HIPAA and SOC 2 Type II stated
- Credit limits on lower plans
- Zero data retention only on higher plans
- Aimed at developers, not consumers
Rex.fit
- Logging happens inside WhatsApp
- No manual calorie entry
- API for fitness businesses
- Wearable is only available to pre-order
- Pricing not published
- Accuracy of photo estimates is unproven
Which one should you choose?
Choose January AI if you want:
- Free tier to test the API
- Large food and recipe database
- HIPAA and SOC 2 Type II stated
Watch out: credit limits on lower plans.
Choose Rex.fit if you want:
- Logging happens inside WhatsApp
- No manual calorie entry
- API for fitness businesses
Watch out: wearable is only available to pre-order.
January AI vs Rex.fit FAQ
What is the difference between January AI and Rex.fit?
January AI: Health data API for meal scanning and glucose prediction without a sensor. Rex.fit: AI calorie tracking from a WhatsApp chat or a wearable. Both are legal, finance & hr tools.
Is January AI or Rex.fit cheaper?
January AI starts at $99/mo and Rex.fit starts at See pricing page. Check both pricing pages for current plans.
Do January AI and Rex.fit have free plans?
January AI: Yes. Rex.fit: Yes.
Who makes January AI?
January AI is made by January AI.
Who makes Rex.fit?
Rex.fit is made by Re.fit.
Which should I choose, January AI or Rex.fit?
Choose January AI if you value free tier to test the api and large food and recipe database. Choose Rex.fit if you value logging happens inside whatsapp and no manual calorie entry.