What's left for today at a glance
Hearth AI is an iPhone calorie and meal tracker you run with your own AI coach. Remaining calories and macros, a meal photo calendar and your weight trend, all in one app.
Hearth Pro (a subscription) is required to use the app. A free trial is available to eligible users.
Meals, workouts, all in one place
Home shows calories eaten, calories burned, what is left for the day and your protein, fat and carbs. Log a meal or your weight right from Home.
- A Home Screen widget shows today’s remaining calories.
- The widget opens “Log meal” and “Log weight” in one tap.
Just talk. Your meal is logged
Connect ChatGPT or Claude and log meals, weight and workouts from the conversations you already have. Send a photo of your meal and the calories and macros your AI estimates are logged in Hearth. The estimate comes from your AI, not from the Hearth app.
The AI connection is a Hearth Pro feature. Today, ChatGPT needs developer mode, which requires a paid ChatGPT plan: you create a connector there. Once Hearth Coach is listed in ChatGPT’s apps, you can add it from Settings > Apps.
Connect in ChatGPT
- On a computer or in a web browser, open chatgpt.com and turn on developer mode in Settings (a paid ChatGPT plan is required).
- Create a new app (connector) and paste the connector URL below.
- Sign in with the same Apple or Google account you use in Hearth and approve access.
https://mcp.hearth.protoductai.com/mcpConnect in Claude
- In Claude, open Settings > Connectors.
- Choose Add custom connector and paste the URL below.
- Sign in with the same Apple or Google account you use for Hearth.
https://mcp.hearth.protoductai.com/mcpYour meals, kept as photos
Browse each day’s meal photos and total calories in a calendar. Numbers your AI estimated can be edited or deleted later.
Coach suggests, you decide
When you fall behind or plateau, your AI coach sends a revised plan. A change to your goal only takes effect when you tap Approve in the app. You can always pass.
See your weight trend on a chart
Every time you log, see how far you are from your target line. A 7-day average shows your progress without the day-to-day swings. Figures are estimates and no result is promised.
Frequently asked questions
Does Hearth AI estimate calories from meal photos?
The app itself does not. When you send a meal photo to ChatGPT or Claude, the calories and macros your AI estimates are logged in Hearth through the connector. You can edit or delete an estimate in the app later.
Is Hearth free?
Downloading is free, but logging meals, workouts and weight, the dashboard, goals and plan, and the AI connection need Hearth Pro (a monthly or yearly subscription). You can sign in and set your goal before subscribing. A free trial applies to eligible users; the purchase screen shows the length, price and conditions.
How do I connect ChatGPT?
For now, use ChatGPT’s developer mode (a paid plan is required): create an app (connector) and paste the connector URL https://mcp.hearth.protoductai.com/mcp. Sign in with the same Apple or Google account you use in Hearth and approve access. Once Hearth Coach is listed in ChatGPT’s apps, you can add it from Settings > Apps.
How do I connect Claude?
In Claude, open Settings > Connectors, choose Add custom connector and paste https://mcp.hearth.protoductai.com/mcp. Sign in with the same Apple or Google account you use in Hearth.
Which ChatGPT or Claude plan do I need?
In ChatGPT, adding Hearth currently goes through developer mode, which requires a paid plan. Once Hearth Coach is listed in ChatGPT’s apps, you can add it from Settings > Apps. In Claude, add it from Settings > Connectors.
Can the AI change my goal on its own?
No. A suggested change to your goal only takes effect when you tap Approve in the app, and it is checked to be within a safe range first.
Is Hearth a medical app? Does it promise weight loss?
Hearth is not a medical device and does not provide diagnosis, treatment or medical advice. Figures are estimates and no result is promised. If you have health concerns, please consult a medical professional.
Start with today’s meal
Works on iPhone with iOS 17 or later.