Free for iPhone

Losing weight alone
is hard.
Together it’s easier.

Snap your meal and let AI count the calories. Log water, coffee and steps with one tap. See who eats the least in a weekly challenge with your friends.

Download on the App Store

Calorie, water, step and meal tracking is free. Challenges and the AI review come with Thinner Plus.

Today

Everything you need, every day

  • Calories with AI

    Take a photo of your plate and get the foods and calories in seconds. Nothing is saved until you confirm.

  • Challenges with friends

    Create a room and share the link. Friends join the challenge with a single tap. The fewest calories wins the week.

  • Water, coffee, alcohol

    Add drinks with one tap. Your calorie balance updates instantly.

  • Steps and activity

    Steps come in automatically from Apple Health, and burned calories count toward your net total.

  • Weekly AI review

    At the end of the week AI looks at your habits and gives you practical tips.

  • Home screen widget

    Tap the widget and the camera opens right away. Logging a meal takes two seconds.

Inside the app

Today
Today
Adding a meal with AI
Adding a meal with AI
Challenge with friends
Challenge with friends
Weekly progress
Weekly progress

Your data stays yours

No account needed. Your diary stays on your device; challenge data is shared only with members of the rooms you join. You can delete all your data at any time.