- 01 / longevity
Live longer, in great health.
Optimize what you can't see: fiber, micronutrients, blood sugar, sleep quality. Nutrition designed for the next twenty years, not just next week.
healthspanhealth markersquality > quantity
nutrition coach · on whatsapp
Your personal dietitian, on WhatsApp.
A nutrition coach who knows you, fits into your life, and guides you every day. No app to download. No diet to follow.
Free to startNo app to downloadCancel in one message
01 The reality
You've tried before. And stopped.
Weighing your food. Scanning barcodes. Calculating macros down to the gram. You know the drill.
You stuck with it for twelve days. Maybe three weeks. Then life took over: an unexpected dinner, a trip, a busy week. And the app stayed in your phone, silent.
It isn't a lack of motivation. It's the tool that didn't hold up.
"The problem with tracking apps is that they turn every meal into a form to fill out. Eating becomes an administrative chore again, the exact opposite of what we were looking for."
02 How it works
One conversation. Nothing to learn.
step 01
You send a photo, a question, or nothing.
No questionnaire, no setup: your first message is all it takes to start. Calerys adapts to how you eat, not the other way around.
step 02
It replies like a human.
No tables. No guilt-tripping notifications. A real conversation, in your pocket.
step 03
You progress without thinking about it.
Day after day, it knows you better than any app ever has. The adjustments happen on their own.
03 Who it's for
One coach. All your goals.
Weight loss, longevity, hormones, performance: Calerys calibrates its advice to your current goal, and evolves with you.
- 02 / weight loss
Reach my target weight, for good.
Daily guidance calibrated for your real life: restaurants, weekends, travel. Not another diet: 0.5 to 1 kg a week, without gaining it back.
0.5–1 kg / weekno strict diet87% maintained
- 03 / hormonal health
Work with my hormones, not against them.
Cycle, PMS, menopause, thyroid: a way of eating that follows your phases and supports your hormonal balance, finely adjusted, week after week.
cycle & PMSmenopausesteady energy
- 04 / muscle gain
Build muscle, cleanly.
A controlled surplus, protein at the right time, calories placed around your sessions. Gain mass without gaining just anything.
controlled surplustargeted proteinmeasured progress
- 05 / metabolic health
Take back control of my markers.
Blood sugar, cholesterol, blood pressure: send your blood test, Calerys decodes it and adapts your plate to the markers that need work, alongside your doctor.
blood test analysisblood sugarcholesterol
- 06 / energy & performance
Eat to perform, recover, last.
Endurance, demanding sessions, 3 pm slumps: nutrition that fuels effort and recovery, not just compensates for it.
recoverysteady energyendurance
04 Inside Calerys
Not an app. A presence.
Three small things make the difference, and explain why people stick with it.
01 · the tone
A real conversation.
Calerys replies like a human. Not like a dashboard. Not like a notification. Like someone who takes the time to understand what you're saying.
02 · the memory
That gets to know you over time.
The more you talk to it, the more its advice sounds like you. Your constraints, your tastes, your rhythm: Calerys remembers it for you.
03 · the friction
Nothing to download.
No app to forget. No password to recover. Calerys lives inside the conversation you already have every day.
05 In real life
Four conversations, one ordinary day.
No polished scenarios. Here's what Calerys subscribers actually message about: the quick snapshot, the Thursday-night question, the 10pm craving.
case · 01 - lunch
"This is my lunch. Good idea?"
case · 02 - dining out
"I'm going to a Japanese place tonight, what should I order?"
case · 03 - sugar craving
"I crave sweets in the evening."
case · 04 - post-workout
"I worked out, what should I eat?"
06 Differentiation
Not an app. Not a clinic.
Calerys lives in between: the expertise of a real dietitian, the availability of an app. Without the downsides of either.
Tracking apps
Calerys
Dietitian · clinic
Weekly price
Free or €10
$3.99/ week
€240/ 3 sessions
Daily friction
Weighing, scanning, logging
A photo, a message
Appointments + journal
Availability
24/7, no reply
24/7, replies in seconds
Clinic hours
Personalization
A number to hit, that's it
Knows your habits
Tailored
Tone
Guilt-tripping, gamified
Calm, no judgment
Professional, distant
Long-term follow-up
Average dropout in 12 days
Continuous conversation
From one visit to the next
07 Testimonials
What they say.
Four stories from the first members, collected by phone, transcribed without edits.
I've stopped thinking about what I eat. And I lost 8 kg.
Sophie · age 36
Mother of two, Lyon
It's like having a dietitian friend in my pocket.
Marc · age 43
Manager, Paris
With Calerys, I understood why my diets never stuck.
Caroline · age 38
Architect, Geneva
First thing I open in the morning, last thing at night.
Karim · age 55
Professor, Lausanne
08 Pricing
Start for free. Decide later.
Your first 5 days are on us, unlimited: no card, no signup. When the end of your trial gets close, Ava herself sends you a secure link to continue.
Starter
Time to see if we click.
Free5 days free
- All of Calerys, right on WhatsApp
- No credit card, no signup
- Photo analysis, advice, daily check-ins
best offer
Yearly
The best rate, for the long run.
$39.99/ year
that's $3.33 / month, billed yearly
- Everything unlimited: messages, photos, voice
- Blood test analyses
- Weekly reviews + adjustments
- Cancel in one message
Weekly
Daily guidance, no commitment.
$3.99/ week
- Everything unlimited: messages, photos, voice
- Blood test analyses
- Weekly reviews + adjustments
- Cancel in one message
Payment happens on WhatsApp. No payment on this site: when you need it, Ava sends you a secure payment link (Stripe), right in the conversation.
How does the free part work?
You message Ava on WhatsApp and everything starts: no card, no signup. Your first 5 days are on us, unlimited. If you want to keep going, Ava sends you a secure subscription link: $39.99 / year (best offer, - 80 %) or $3.99 / week — everything unlimited either way.
Are my data and photos private?
Yes. Conversations are end-to-end encrypted by WhatsApp. On the Calerys side, your photos and messages are stored on European servers (Switzerland / France), encrypted at rest. You can export or delete all of your data at any time, in one message to the coach.
Is it really reliable, compared to a real dietitian?
Calerys doesn't replace a certified dietitian for medical cases. For the vast majority of situations (losing a few kilos, eating better day to day, handling a social meal), it offers the same level of advice as a session, with the advantage of being there at the exact moment the question comes up. Our content is reviewed by a committee of dietitians.
How do I unsubscribe?
By sending the word "stop" to the coach, or via the link in any billing email. It's immediate, no questions asked, no follow-ups.
What if I'm diabetic, pregnant, or have allergies?
Calerys can support these situations alongside medical care, never as a replacement. State your context when you start: recommendations are adjusted accordingly, and the coach systematically refers you to a healthcare professional for decisions that require it.
What languages does Calerys speak?
English, French and German today. Italian and Spanish planned for late 2026. The coach automatically detects the language of your first message.
Does it work if I travel often?
Yes, that's actually where Calerys shines. Jet lag, unfamiliar local cuisine, set restaurants: send the menu or a photo of the dish and you get a contextual recommendation within seconds.
Is Calerys available in Switzerland and Germany?
Yes. Calerys is published from Lausanne (Switzerland) and deployed in France, Switzerland, Germany, the United Kingdom and the United States. The rate is the same everywhere, billed in your currency (euro, Swiss franc, dollar or pound); VAT handled automatically.
I don't like WhatsApp. Do you have an app?
Not for now, and that's intentional. WhatsApp is already on 95% of our target's phones. Another app is one more app to open, update, and forget. The coach speaks to you where you're already chatting every day.
- GDPR compliant
- Data never sold
Five thousand people are done counting.
Message Ava on WhatsApp and start for free: no app, no card, no signup.
Free to start · cancel in one message