How to read this app
The traffic light, the two servings, where each number comes from and what "for you" means.
This app shows figures rather than advice, and the vocabulary it uses is explained here once so it does not have to be repeated on every food page.
The colours. The traffic light does not say whether a food is good: it says how much fits. Green is "low FODMAP" in a normal serving; amber is "moderate", which means the amount decides; red is "high FODMAP", and a normal serving already adds up. The less of a normal serving fits, the higher the level.
The two figures. Every food page shows a "maximum amount" and a "typical serving". The first is how far the measurement stays below the low cutoff; the second is what people actually eat. The colour comes from comparing the two, which is why both are on screen.
Where each number comes from. The page says so, and there are four cases: measured in a laboratory, worked out from official food tables, no measuring needed —the food has none of the sugars FODMAPs come from— and no published measurement at all. The last two do not mean the same thing.
"For you" does not come from the catalogue. It comes from your diary and your challenges: it is what the app works out from what you logged. The catalogue is the same for everyone; that part is yours alone, and it goes with you if you delete your data.
The app gives no verdicts. No food is marked good or bad: it comes with what it contains, how much fits and who measured it. The rest depends on the portion, the day and the person, and that is yours to decide.