Calk

Calk is an iPhone calorie counter. You take a photo of a meal and it estimates calories, protein, carbs, fat and fiber, then logs the entry. It sets daily calorie goals from your profile and activity level, and you can also set your own macro goals.

Water intake and intermittent fasting are tracked in the same app. You can look back through your meal history, weekly summaries and a progress calendar, and save favorite meals so you can log them again quickly. The app is available in English and 17 other languages.

The app is free to download, and eligible new users get 7 free food scans. After that, scanning requires a Calk Premium subscription, listed at $4.99 per month or $19.99 per year. The developer notes that photo results are estimates and that the app does not give medical advice.