Make your health a daily habit — not a yearly appointment.
checkapp brings a simple daily health ritual to your phone. A quick photo of your tongue, face or iris — and DiDi gives you a private wellness insight. No noise, no dashboard overload.
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Health checkups shouldn’t happen just once a year
Traditional health checkups can be stressful, time-consuming, and uncertain. Your health changes every day, so why should checking in on it be an occasional event?
Months can pass between health assessments.
Small changes in your health may go unnoticed.
Waiting for results can feel overwhelming.
Too often, action begins only after symptoms appear.
Your digital health assistant from the future.
Meet DiDi, your digital health companion. DiDi helps you pay attention to yourself through photos you choose to take. It does not diagnose.
Start whenever you like
Open checkapp and tap Start Tongue Scan. Nothing runs until you do.
Take a quick photo
Tongue, face or iris, only when you choose to.
DiDi answers in the chat
A short wellness insight, in plain words, in the same conversation.
See what DiDi noticed
Tongue color, coating, moisture and one small next step for today.
- Tongue
- Face
- Iris
Photo scans of your tongue, face and iris — whenever you choose. No background scanning.
Inspired by 4P medicine: personalized, preventive, participatory and predictive — turned into simple daily insights, never diagnoses.
The future of everyday wellness is 4P
Personalized
DiDi works from the photos you choose to take, so what you get back is about you, not a generic checklist.
Preventive
Daily attention and gentle nudges. A quick check-in and a small push to look after yourself today.
Participatory
You decide what to share, and when. DiDi only looks at what you send, and you can delete your data anytime.
Predictive
DiDi gives a short wellness read in plain language — never diagnoses or disease predictions.
For people who bounce off health apps
It turns out a little warmth goes a long way. These are the signals people come back for.
Alex Morganearly DiDi member“Most health apps make me feel like I have homework. DiDi feels different. It asks the right question at the right time, without overwhelming me.”
Emily StoneWeb3 Enthusiast“I tried the tongue scan out of curiosity. What I liked most was getting a simple, understandable next step instead of another confusing report.”
Priya NairProduct Manager“It takes ten seconds. I take the photo with my coffee, DiDi tells me what it noticed, and that is the whole routine.”
Marcus BellHigh-school teacher“I like that it never pushes. I scan when I feel like it, and nothing nags me for the rest of the day.”
Ryan WalkerStartup Founder“I never expected to talk to a wellness app, but DiDi makes it surprisingly easy. Sometimes I just need a quick conversation, not more data.”
Sofia CarterProduct Designer“I love how the conversations change based on my previous check-ins. It doesn't feel like answering the same five questions every morning.”
Hannah FischerGraphic designer“I asked myself if it was spying on me. It is not: nothing happens until I take a photo, and I can delete my data whenever I want.”
Omar HaddadLogistics coordinator“The small nudges are the best part. Drink some water, stretch a bit. Small enough that I actually do them.”
Liam TurnerUI/UX Designer“Between classes, I barely remember to drink water. The gentle reminders help me pay attention without making me feel guilty.”
Daniel RossBlockchain Analyst“The dashboard feels fast reliable and well designed making everyday crypto management easier safer and more enjoyable for all types of users around the world today with confidence always on.”
Chloe DuboisGraduate student“Streaks in other apps made me feel guilty after a missed day. DiDi is kind about it, so I come back the next morning.”
Yuki TanakaFreelance photographer“The photo scan feels almost playful. I did not expect to enjoy a health app, but here I am, opening it every day.”
Lucas AlmeidaRemote developer“No dashboards, no charts to decode. Just a short note in plain words. That is why I keep opening it.”
Ryan WalkerStartup Founder“I never expected to talk to a wellness app, but DiDi makes it surprisingly easy. Sometimes I just need a quick conversation, not more data.”
Sofia CarterProduct Designer“I love how the conversations change based on my previous check-ins. It doesn't feel like answering the same five questions every morning.”
Hannah FischerGraphic designer“I asked myself if it was spying on me. It is not: nothing happens until I take a photo, and I can delete my data whenever I want.”
Omar HaddadLogistics coordinator“The small nudges are the best part. Drink some water, stretch a bit. Small enough that I actually do them.”
Liam TurnerUI/UX Designer“Between classes, I barely remember to drink water. The gentle reminders help me pay attention without making me feel guilty.”
Daniel RossBlockchain Analyst“The dashboard feels fast reliable and well designed making everyday crypto management easier safer and more enjoyable for all types of users around the world today with confidence always on.”
Chloe DuboisGraduate student“Streaks in other apps made me feel guilty after a missed day. DiDi is kind about it, so I come back the next morning.”
Yuki TanakaFreelance photographer“The photo scan feels almost playful. I did not expect to enjoy a health app, but here I am, opening it every day.”
Lucas AlmeidaRemote developer“No dashboards, no charts to decode. Just a short note in plain words. That is why I keep opening it.”
Alex Morganearly DiDi member“Most health apps make me feel like I have homework. DiDi feels different. It asks the right question at the right time, without overwhelming me.”
Emily StoneWeb3 Enthusiast“I tried the tongue scan out of curiosity. What I liked most was getting a simple, understandable next step instead of another confusing report.”
Priya NairProduct Manager“It takes ten seconds. I take the photo with my coffee, DiDi tells me what it noticed, and that is the whole routine.”
Marcus BellHigh-school teacher“I like that it never pushes. I scan when I feel like it, and nothing nags me for the rest of the day.”
Liam TurnerUI/UX Designer“Between classes, I barely remember to drink water. The gentle reminders help me pay attention without making me feel guilty.”
Daniel RossBlockchain Analyst“The dashboard feels fast reliable and well designed making everyday crypto management easier safer and more enjoyable for all types of users around the world today with confidence always on.”
Chloe DuboisGraduate student“Streaks in other apps made me feel guilty after a missed day. DiDi is kind about it, so I come back the next morning.”
Yuki TanakaFreelance photographer“The photo scan feels almost playful. I did not expect to enjoy a health app, but here I am, opening it every day.”
Lucas AlmeidaRemote developer“No dashboards, no charts to decode. Just a short note in plain words. That is why I keep opening it.”
Alex Morganearly DiDi member“Most health apps make me feel like I have homework. DiDi feels different. It asks the right question at the right time, without overwhelming me.”
Emily StoneWeb3 Enthusiast“I tried the tongue scan out of curiosity. What I liked most was getting a simple, understandable next step instead of another confusing report.”
Priya NairProduct Manager“It takes ten seconds. I take the photo with my coffee, DiDi tells me what it noticed, and that is the whole routine.”
Marcus BellHigh-school teacher“I like that it never pushes. I scan when I feel like it, and nothing nags me for the rest of the day.”
Ryan WalkerStartup Founder“I never expected to talk to a wellness app, but DiDi makes it surprisingly easy. Sometimes I just need a quick conversation, not more data.”
Sofia CarterProduct Designer“I love how the conversations change based on my previous check-ins. It doesn't feel like answering the same five questions every morning.”
Hannah FischerGraphic designer“I asked myself if it was spying on me. It is not: nothing happens until I take a photo, and I can delete my data whenever I want.”
Omar HaddadLogistics coordinator“The small nudges are the best part. Drink some water, stretch a bit. Small enough that I actually do them.”
How checkapp works
Take a photo of your tongue, face or iris.
DiDi reads the photo and shares a short wellness insight.
Keep the habit going — another check-in tomorrow, if you want.
Frequently asked questions
Is this a medical device?
No. checkapp provides general wellness information and is not a medical device.
Does DiDi diagnose?
No. DiDi does not diagnose and does not replace a licensed doctor.
Does it run in the background?
No. checkapp only scans when you take a photo. Nothing runs in the background.
Where is my data processed?
In the cloud, and only with your consent. You can delete your data anytime.
Your health is in your hands — with DiDi in them. Get checkapp.
Your health deserves attention. Every day.
Photos are processed in the cloud only with your consent. Face and iris images need clear permission. You can delete your data at any time.
