28 ASE certifications in one app — all 22 World Class tests plus six more. Timed practice exams that mirror the real thing, live-data diagnostic scenarios, a full sensor reference library, and a pay-ladder game that makes studying stick.
Your first full run is free — no account, no card. Works right in your browser.
Redline runs as a real installable app. Open the link on your phone, add it to your home screen, and it launches full-screen with its own icon — no download page, no waiting on a store review.
Open redlineprep.org/app.html in Safari. Tap the Share button — the square-with-an-up-arrow in the toolbar, or on newer iPhones (iOS 26) tap the ••• button by the address bar first, then Share. Scroll down and tap Add to Home Screen, then tap Add — the icon lands on your home screen.
Open redlineprep.org/app.html in Chrome. Tap the ⋮ menu, top right. Tap Add to Home screen or Install app, then confirm — it installs like any other app.
Once installed, it works fully offline — no signal needed in the bay.
Most prep apps are a flashcard deck with an ASE label on it. This one was built by Master and World Class Technicians.
Climb rung by rung for points. Safe rungs lock your score, lifelines bail you out, and a hidden Last Chance appears when your Second Chance burns. Studying that feels like a game show, not a worksheet.
Real question counts, real time limits, and unscored research questions mixed in — exactly like test day. Finish with a percentage score and a report card broken down by task area.
A work order, live scan data with color-coded PIDs, and branching decisions. Smart calls advance you. Parts-cannon moves come back with what they cost. Graded on how a good tech would actually work.
36 sensors and actuators covering 60+ documented types: pin counts, native signals, normal readings, how to test each one, and what a failed one does to the vehicle. Plus a quiz mode built from the same data.
The theory that carries every test — electrical fundamentals, A/C, brakes, engine breathing — plus a playbook for beating Tech A / Tech B questions. Separate Collision Bootcamp for the B-series.
Seal certificates by topping every section and passing the exam at 80%. Track the real ASE certs you already hold with five-year recert reminders. Chase Master titles and World Class.
All 22 World Class certifications plus A9, B6, G1, C1, L3 and L4. Section weights follow ASE's published test specifications, so you study where the questions actually are.
L-series tests are open-book against a composite vehicle. Redline includes original composite spec books for gas, diesel, hybrid, and ADAS so you can practice navigating a reference under time pressure.
A single ASE test costs about $68 to sit, and more if you have to sit it twice. Redline covers all 28.
Trying it out? Start here.
Studying for one test? Start here.
About the cost of two test fees.
Certs expire every five years. This doesn't.
Every series included. No add-on bundles, no per-series upcharge.
For comparison: comparable shop training memberships run about $1,295 a year for five seats, with the truck series sold separately on top — with Redline, it's already included.
Lifetime is purchased directly through this site rather than an app store.
Pointers on the task areas techs miss most, plus first word when new practice sets drop. No spam, unsubscribe anytime.