Every answer shows
the rule it comes from.

Groundwork prepares you for the FAA Part 107 knowledge test — the Unmanned Aircraft General exam for a Remote Pilot Certificate with a small UAS rating.

You should be able to check us. Every question cites the exact FAA paragraph that settles it, and prints the passage word for word under the answer. 14 CFR § 107.51(b), not “trust us”.

Why that matters

Prep apps in this category are widely reported to ship wrong answers, and stale ones. The rules changed in 2021 for night operations, operations over people and Remote ID, and material written before then is still circulating. Groundwork shows the edition date of every document it draws on, so you can see for yourself whether it is current.

Built on the FAA’s own blueprint

The FAA publishes exactly what the test may ask about: FAA-S-ACS-10B, the Airman Certification Standards — five Areas of Operation, 17 Tasks, 176 knowledge elements. Groundwork is organised by that document rather than by an invented chapter list, so “what is left to learn” has a checkable answer.

What you get

137 questions, every one cited and quoted — including 25 from the FAA’s own published sample set, marked as such.
Mock exams that mean something. 60 questions, two hours, 70% to pass, apportioned across the five areas in the FAA’s published weighting.
Readiness per ACS element, so you drill what you are actually weak at.
Works entirely offline.

Nothing leaves your iPhone

There is no account, no sign-in, no analytics, no trackers and no network code in the app beyond the App Store purchase itself. Your answers live in a single file on your device, and deleting the app deletes them. The privacy label says Data Not Collected because it is true.

One payment

$29.99 once unlocks everything, permanently. Not a subscription. Nothing auto-renews. It restores free on your other devices.

The FAA charges $175 to sit the knowledge test — and again if you fail it. The study browser, the source citations, 25 practice questions and one scored mock exam are free forever, so you can check our accuracy before paying a cent.

Sources

Document	Edition
14 CFR parts 107, 89 and 48	current e-CFR
FAA-S-ACS-10B — Airman Certification Standards	effective 6 Apr 2021
FAA-H-8083-25C — Pilot’s Handbook of Aeronautical Knowledge	2023
AC 107-2A — Small Unmanned Aircraft Systems	1 Feb 2021
FAA Aeronautical Chart User’s Guide	effective 22 Jan 2026
FAA-G-8082-22 — Remote Pilot Study Guide	August 2016

All are works of the U.S. Government and are not subject to copyright under 17 U.S.C. § 105. Groundwork is study material. It is not affiliated with or endorsed by the FAA, and passing a mock exam here does not guarantee a pass on the real test.