Waistline is a calorie counter and weight tracker that allows you to keep a diary of the food you eat and track variations in your weight.

All data is kept on your device, it's never shared with a server or uploaded to the "cloud" (unless you want to upload data to Open Food Facts) but it can be exported or imported easily when needed.

The app includes a barcode scanner that connects to the Open Food Facts database to pull in product information.

Best of all this app respects your freedom, data, and privacy. It is entirely free/libre and open source. The source code is available on GitHub - https://github.com/davidhealey/waistline