Also https://world.openfoodfacts.org/ exists, and has an app with everything you'd need. And is just crowd sourcing nutrition labels and barcodes.
1. Generic, non-branded foods
2. Simple prepared foods that ease food entry
3. Restaurant foods
4. Micronutrients beyond those reported by the brand.
OFF is a fantastic project but OpenNutrition is really trying to fit a different niche. OFF does what it does very well; I would never be able to use it to track my food intake.
We're happy to cover more use-cases, so feel free to join the project and contribute your time/coding skills to help us solve those issues. https://slack.openfoodfacts.org or https://forum.openfoodfacts.org or directly https://github.com/openfoodfacts