Scout knows where the Part 107 trap answers are.
Sentra Response makes exam-prep apps, all taught by Scout. The first one prepares you for the FAA Part 107 Remote Pilot knowledge test, and it runs in your browser today.
Part 107 Remote Pilot: free to try, $14.99 for the full course. One purchase covers the web app and the iPhone and Android apps when they launch.
Coming soon for
- iPhoneon the App Store
- Androidon Google Play
What is the maximum altitude for a small UA that is not within 400 feet of a structure?
Pick an answer, then check it. If it's a known trap, I'll say so first.
Three questions from the app. Pick an answer and check it. Ten more, with answers, are on the free Part 107 practice test, and the free web app has 150 and a full practice test.
Part 107 Remote Pilot test prep
The FAA's initial knowledge test for a remote pilot certificate has 60 questions and a two-hour limit, and you need 70% to pass. Every question in the app maps to an item in the FAA's Airman Certification Standards, so your weak spots come back as the same codes your test report uses. How the test works, what it costs and how to book it.
Your route to test day
-
Learn all five areas
Regulations, operations, airspace, weather, and loading and performance: more than 1,100 original questions, every one explained, in sets of 10, starting with the area that needs the most work.
-
Practice with Scout
Pick a known trap answer and Scout flags it before you check. After you check, he explains the right answer and yours, and cites the rule.
-
Take full practice tests
60 questions in 120 minutes, scored like the real test. No hints until you submit. The report lists the ACS codes you missed.
-
Book your test
Your readiness score counts each area by its share of the test. Book the real one when it passes 70%.
Every answer explained
Each question explains every wrong choice on its own terms: the mistake behind it and the fix. Pick a wrong answer and Scout talks about the one you picked. The others are a tap away.
- In the FAA's own words
- Every explanation cites its rule, and each quote is checked word for word against the regulation, the AIM or the FAA handbook it comes from. Tap the citation in the app to read it.
- The charts the test uses
- Chart questions use the figures in the FAA's testing supplement and excerpts of the current sectional charts, the kind of image the test added on October 26, 2026. The app zooms to the spot each question asks about.
- Extra care where test takers slip
- The FAA's test statistics name declarations of compliance as the most missed topic on the Part 107 test, missed 79% of the time. The app marks those questions so you slow down.
Refer to the sectional chart excerpt. The Frederick Muni (FDK) Class D is in effect. You’ll fly a small UA at 400 feet AGL inside its dashed blue line, over ground at about 300 feet MSL. Is your UA in the Class D?
No; the Class D starts at 2,800 feet MSL
That's the ceiling. The boxed 28 is the top of the Class D, 2,800 feet MSL. Class D starts at the surface, so your UA at about 700 feet MSL is inside it.
Scout, before you check: “Watch it. Check whether the boxed number marks the top or the bottom of the Class D.”
Yes; it reaches up to 2,800 feet MSL
Right. The dashed blue line marks Class D from the surface up to the boxed figure: 28, or 2,800 feet MSL. Your UA at about 700 feet MSL is inside it, so you need ATC authorization.
No; the Class D starts at 700 feet AGL
That's a vignette floor. A magenta vignette marks Class E starting at 700 feet AGL. The dashed blue line marks Class D from the surface, so your UA is inside it.
“Generally, Class D airspace extends upward from the surface to 2,500 feet above the airport elevation (charted in MSL) surrounding those airports that have an operational control tower.”
Aeronautical Information Manual, 3-2-5
Weighted like the real test
The five areas don't count equally. Practice tests draw questions in the same proportions as the real test, and your readiness score weighs each area by its share.
Share of the test by area, for tests taken from September 29, 2025.
- RegulationsPart 107 rules, certification, waivers, remote ID48%
- OperationsAirports, emergencies, decision-making25%
- AirspaceClasses, sectional charts, authorization20%
- WeatherMETARs, TAFs, effects on performance5%
- Loading and performanceWeight, balance, load factor2%
Scout
Scout is the instructor in every Sentra Response app: a sentinel robot with a dot-matrix visor and a beacon on his antenna. He hovers beside each question and watches the answer you pick.
When you pick a known trap, his beacon flashes and he says so before you check. His face changes with the moment, so you can read him before he speaks.
Neutral
Happy
Wink
Alert
Thinking
Encourage
Oops
Surprised
Confident
How Scout talks
Short sentences and plain words. Every line carries a fact, a number or the next step, and he stays calm when you're wrong.
Correct. A magenta dashed line marks a Class E surface area.
That layer is scattered. SCT covers 3/8 to 4/8 of the sky, too little for a ceiling.
ScoutWatch it. Check what that 400 feet is measured from.
Regulations is 48% of the test and your weakest area.
Free to try. $14.99 for the full course.
In your browser now. Coming soon for iPhone and Android.
Start with 150 questions and one full practice test, free and with no account. Unlocking the full Part 107 course is a one-time purchase, not a subscription, and it includes the iPhone and Android apps when they launch: sign in with the email you paid with on any browser or phone.
More exams, same instructor
Part 107 is the first Sentra Response app. Real estate licensing, bar and police exams come next, each built on its exam's real format and taught by Scout.