Not worth the money!
The database is vague and very limited. Many basic ingredient foods are not included. Descriptions of many of the processed foods dont appear to match anything on an American grocery shelf. Most of the useful information found in this app can also be found on free graphics available on the Internet.
The portion size indicators could be helpful if there were more foods in the database.
The food diary did me little good as an American. Many things I eat are not in the database and there are not equivalents. Maybe it works if you are able to follow their proscribed diet.
For example, the app has several versions of gluten-free bread, but base ingredients are not included so that you can compare them to the brands that are available on the grocery store shelf.
This app is probably worth about $2, not $8. I really hope after spending the money that the updates include a lot more foods that I actually can purchase.
Rhos224 about
Monash FODMAP Diet, v2.0.1