One simple AI feature: take a photo of a meal, get the calories.
Grow an AI calorie-tracking app to $50M ARR and sell it: Cal AI
A very simple AI promise plus constant testing scaled: he says A/B tests took revenue per download from $1 at launch to $4 fourteen months later.
Figures as shared by the creator · source
From @zach_yadegari on X · Mar 2026
Watch the video
Source post
The workflow
Where & with what
What they did
- 1The moveZach Yadegari started Cal AI at 17 with his cofounder Henry.
- 2Step 2Pick one daily task AI can make instant
- 3Step 3Launch with a single feature
- 4ResultOn Sep 5, 2024 he posted that Cal AI had passed $1 million in revenue.
Quick answers
What tools do you need?
Just the platform account.
How much does it cost?
No paid tools needed: this case uses only the platform itself, which is free to join.
Is it allowed?
Follow the platform rules and disclose ads.
Watch out: Figures as shared by the founder on X; the sale price was not disclosed. This was a 30+ person team by the end, not a solo side project.
Try it yourself
(Our template, not the creator's prompt.) Help me design a one-feature AI app for [daily habit]: the single action the user takes, what the AI returns, a 3-screen onboarding, and 3 paywall tests to run in the first month.
Your first step
Paste the prompt into your AI assistant and swap the [brackets] for your own niche.
Full write-up & sources
More detail: The app estimates calories and macros from a photo of your meal. He shared the app's milestones in public on X.
Results: On Mar 2, 2026 he announced that MyFitnessPal had acquired it, saying Cal AI broke $50M ARR within 18 months with a 30+ person team. That post has 7,002,634 views (X, checked Oct 19, 2026).
Source: @zach_yadegari on X · Mar 2026. Summarised in our own words; figures as shared by the creator or shown on the platform. Updated .
