Bite Diary is a calorie and nutrition tracker for Android built around one rule: your food diary never leaves your phone. There is no account to create, no cloud sync, and no server behind it — everything you log lives in a local database on your device, and uninstalling the app deletes it (a backup file you saved yourself stays wherever you put it). A barcode lookup sends nothing but the barcode number, sharing product data with Open Food Facts is always your choice, and the single banner ad is served by Google AdMob.
You can log meals three ways: search a built-in library of 285 whole foods with USDA FoodData Central values, scan a product barcode to pull nutrition from Open Food Facts, or enter foods manually. If a barcode result is missing or wrong, you can correct it inside the app and push the fix back to Open Food Facts so it helps everyone — Bite Diary is a listed reuser of the Open Food Facts database.
Beyond calories it tracks protein, carbs, sugars, fiber, fat, saturated fat, sodium and cholesterol, and you choose which of those appear on your dashboard, each with its own goal. It also handles recipes (build a meal from ingredients and it calculates the nutrition per serving or per 100 g), weight tracking with an optional BMI indicator, and a weekly calorie chart. Optional meal reminders arrive only for meals you haven't logged yet, a logged food can be moved to another meal, and the whole diary can be saved to a backup file you choose and restored later.
Metric and imperial units, dark mode, four themes, and fifteen languages. Logging works offline.
Free with one banner ad on the home screen — no subscription, no paywalled features, no premium tier. Android only, and not open source.
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