DET Phase 1
DET pricing is not open yet.
PrepEx DET is live as a starter practice hub with separate content, progress, and submission tables. Checkout stays disabled until the library, AI scoring, and entitlement paths are ready.
Practice Hub
Reading, Listening, Writing, and Speaking task families under `/det/practice`.
DET Feedback
Objective items use DET 10-160 score language. AI scoring comes after Phase 1.
Grammar Mastery Suite
Core grammar practice is available now, with premium topics unlocked by any active paid PrepEx exam subscription.
Separate Access
DET billing will be product-scoped when pricing and premium content are enabled.