Every explanation cites the FAA source it's based on — and you can open that source inside the app, on the exact page, without hunting through a PDF.
Handbooks (FAA-H-8083-…)
Tap a handbook citation and the built-in viewer opens to the exact page with the relevant paragraph outlined in yellow, so you can read the cited passage in its full context.
Regulations & the AIM
Citations to 14 CFR (the regulations) and the Aeronautical Information Manual link straight to the precise section on the official eCFR / faa.gov sites, so you're always reading the current, authoritative text.
This is one of the biggest differences between memorizing and understanding: when an explanation makes a claim, you can verify it against the FAA's own words in two taps.