Free on the App Store

Calorie tracking you can check

Photograph a meal and Calvin reads the nutrition: calories, protein, carbs, fat and fiber. Each food is listed with its own numbers, so a bad estimate takes one tap to fix.

Free to download. You can browse the nutrition database below without an account.

How it works

Take a photo, get the estimate, check the working.

Step 1

Log your food

Take a photo of your meal, type a description, or scan a barcode. Whatever is quickest at the table.

Step 2

Check the working

Calvin names each food on the plate and shows an estimate for every one, with a confidence rating. Adjust a portion or fix a wrong item and the total follows.

Step 3

Track your progress

See your day against your goal, your macro breakdown, and how this week compares to the last one.

What Calvin does

Log it fast, then check it properly.

AI Photo Analysis

Snap a photo and Calvin identifies every food item, portion size, and cooking method. Works with home-cooked meals, restaurant food, and packaged snacks.

Smart Text Entry

Type “coffee with oat milk” or “chicken stir fry with rice” and Calvin works out the nutrition. Barcode scanning and food search are there when you want the exact product.

Daily Journal & Insights

Your meals laid out day by day. Browse any past date, keep a streak going, and edit an old entry when you spot a mistake.

Water Tracking

Log water alongside your food. Set a goal and record a glass with one tap.

Why Calvin?

Most calorie trackers make you search databases and enter every detail by hand. Calvin takes a different approach.

Seconds, not minutes

A photo takes seconds where a database search takes minutes. The time you save goes into a quick look at the result instead.

Honest about accuracy

Every reading is an estimate, and Calvin treats it like one. The foods are listed separately, each carries a confidence rating, and anything wrong is yours to correct.