Building https://xitter.cf/t.co/xgL0ROiEtB and sharing our journey. Former Google DeepMind Gemini.
Joined July 2008
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I always say knowing what to do for your health is easy, but doing it day after day is hard.
Whether you’re working on your blood sugar, blood pressure, cholesterol, or weight, we built Lemon for you. Lemon is your health companion that turns goals into small, personalized actions you can actually do, and adapts daily to keep you motivated and ultimately change your health behavior.
Here’s our launch video.
CDC estimates 42.6% of U.S. adults have prediabetes, and 80% don't know about it! That is insane. Prediabetes is like your final warning you need to change your lifestyle. Simple blood tests can help you find where you stand.
What we see with SEO: tool pages (e.g. water intake calculator) and comparison pages (e.g. best health apps in 2026) perform better than educational content written by professional medical staff...
It's incredible how niching down feels like a hard choice for startups but when it's done you immediately feel good about it.
Moving from Lemon is your AI health companion to Lemon is your health companion for chronic condition and everyday health.
Our best users are the ones with prediabetes, hypertension or high cholesterol. Being "AI" is not as relevant as it used to.
Just discovering about @lulumeservey . Great manifesto for PR: getflack.com/p/go-direct-the… . And a great take on 2026: getflack.com/p/standing-out . Be real.
Proud to have helped launch the Gemini app on mobile. Now it’s crossed 1B monthly users 🤯🚀 blog.google/innovation-and-a…
#Consumer AI: our DAU/MAU ratio is now touching 39% for our health app! All the way from 12% when we first had an initial buggy version. We keep adjusting our value prop, fixing issues and we are confident we can go to 50%! That's not our north star but it's a metric we track closely at lemonhealth.ai to understand if our product is a daily one.
Just migrated to #revenuecat paywall instead of custom for our app. Makes so much sense for fast iteration, I wish I knew about it earlier.
As AI makes software easier to build, what remains defensible? Some moats are valid today but might weaken with time:
- your operational excellence
- your distribution
- your trust and quality
One aspect that I don't see yet how AI can directly disrupt it is the network effect. A clone can reproduce the interface, AI will get better at operations, but it always starts with an empty network.
Making Lemon public!
After onboarding a thousand users in closed beta, and learning what works and what doesn't, we are happy to bring it to a wider audience.
Lemon is a new way to change health behavior. It is the Al health companion trained to increase the number of healthy actions people take. Anyone with a health goal can use it, but we found it works particularly well for people who need to change their lifestyle because of chronic conditions. You probably know someone like this who needs to adjust their lifestyle to reduce their hypertension, improve their weight, reduce their risk of heart disease. You should tell them about Lemon.
Unlike any LLM that can give you some medically sound recommendations that you may, or may not follow, our secret sauce is using reinforcement learning techniques to learn what makes you actually act and change your behavior:
- what type of actions work for you
- what difficulty is realistic
- how long it should take
- what language motivates you
- what channel to reach out to you for which occasion
- what sequence of actions helps you build momentum
And it adapts, day after day, for you.
And that's just one aspect of helping you act. There is much more to it. From social challenges to identity alignment, and coming soon personalized educational material, Lemon team is on fire
You can download the iOS app here:
apps.apple.com/app/apple-sto…
