Real-time quiz progress backup for Coursera—resume instantly across any device.
Coursera's mobile app crashes during quizzes, preventing students from studying effectively on the go.
StableSyncQuiz runs as a lightweight browser extension and companion PWA that captures quiz state in real-time from Coursera web, backing it up to the cloud. If the app crashes on mobile, switch to PWA and resume exactly where you left off. Ideal for commuters switching between phone, tablet, and laptop.
Busy students enrolled in online courses on platforms like Coursera who depend on mobile apps for studying during commutes or short breaks.
Live state capture from Coursera web/app via extension + AI-predicted crash recovery.
friendly
Chrome ext to capture quiz state live.
Companion app to load and continue quizzes.
Secure real-time sync of quiz state.
Seamless handover between devices.
Notify on potential crash risks.
Log all sessions for review.
One-click state export.
Add study timers to sessions.
Share session with study partner.
Schedule quiz sessions.
| Column | Type | Nullable |
|---|---|---|
| id | uuid | No |
| text | No | |
| extension_id | text | Yes |
| created_at | timestamp | No |
| Column | Type | Nullable |
|---|---|---|
| id | uuid | No |
| user_id | uuid | No |
| coursera_url | text | No |
| started_at | timestamp | No |
Relationships:
| Column | Type | Nullable |
|---|---|---|
| id | uuid | No |
| session_id | uuid | No |
| quiz_state | jsonb | No |
| timestamp | timestamp | No |
Relationships:
| Column | Type | Nullable |
|---|---|---|
| id | uuid | No |
| user_id | uuid | No |
| device_token | text | No |
Relationships:
/api/sessionsStart new session backup
/api/states/:sessionIdUpdate state
/api/sessions/:id/resumeGet latest state
/api/sessionsList sessions
/api/extension/registerRegister extension
No multi-device
| Month | Users | Conversion | MRR | ARR |
|---|---|---|---|---|
| Month 1 | 80 | 1.5% | $30 | $360 |
| Month 6 | 600 | 3.5% | $630 | $7,560 |
Extension + PWA auto-backups your progress—switch devices, never restart.
Target Coursera crash Twitter complaints with DM offers for free Pro; run giveaway in r/coursera for extension installs; interview 5 users for feedback post-signup.
Page clipping
No dynamic state or quiz resume
Real-time quiz-specific backup
Note sync
Manual, no live capture
Automated for quizzes
Extension install lock-in + proprietary state serialization.
Remote learning peak, browser extensions gaining traction for productivity.
Extension review delays
Prepare for multiple stores
Browser policy changes
PWA fallback
Success: 15 positive feedbacks
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