Well i eat out almost always at healthy-ish chains (Cava, Panera, etc) so GPT gets the calories directly from each chains website. As for food prepared in regular restaurants I use it the same and its not precise but close same with home cooked meals per my testing the data.

Overall I am a bit obsessed but not that obsessed to the point it needs to be exact on-point precise.. just give me an idea of where my calorie count stands for anytime of the day. Just be way better if it was done auto-magically and Im betting this will be a good future use that gets people excited for smart glasses one of many upcoming innovations with them.