Case study
Prepsync: exam prep that tells students exactly where they stand
Client under NDA
Product screenshots coming soon — the numbers are already live.
Challenge
Exam-prep students practice a lot but learn little about where they are weak: paper mocks get scored days later and give one total number. We wanted scoring in seconds and analytics per topic, on the device students actually study with, their phone.
Solution
Prepsync delivers timed mock exams that mirror real test conditions, scores them instantly, and turns results into a per-topic profile: which question types cost the most points and what to drill next. Teachers and centers get a dashboard view of their groups, making it usable both by individual students and prep schools.
Architecture
We show real architecture. Agencies never do.
A Flutter app backed by a NestJS API, with the question bank, attempts, and scoring models in PostgreSQL via Prisma. Exams download to the device so a mid-exam connection drop does not void the attempt; results sync when the network returns. Scoring logic lives server-side so question weighting can be tuned without an app-store release.
Results
- Score feedback moved from days to seconds
- Students get a per-topic weakness map instead of a single total
- One Flutter codebase ships both stores, halving mobile maintenance cost versus two native apps
- Prep centers monitor group progress from a web dashboard
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