FileBridge and the developer (Brian Dashore) do not collect your data. Period.
FileBridge is an app meant to run locally on your iDevice. The only contents pulled from the internet are tutorial videos used in the “Guides” section of the app.
Due to the app being free and open source (FOSS), you can view the code and see that the app physically cannot collect your data.
Does this comply with COPPA?
Yes, FileBridge does comply with the Children's Online Privacy Protection Act. Personal information is not collected from anyone which includes individuals under the age of 13.
Contact the developer