Mobile OBD diagnostics for freelancers – scan, diagnose, and repair on the go for just $35/mo
Freelancers in automotive diagnostics face prohibitively high costs and a lack of affordable, mobile-friendly tools, forcing them to rely on shops instead of working independently.
DiagWrench connects affordable Bluetooth OBD scanners to your phone for real-time vehicle diagnostics. It translates error codes into plain English with step-by-step mobile repair guides, eliminating the need for expensive shop tools. Freelancers can generate professional reports instantly to bill clients on-site.
Independent freelancers specializing in automotive diagnostics and mobile repairs
Cheapest mobile-first OBD app with AI-powered code explanations tailored for independent mechanics, no hardware lock-in.
supportive
Pair with any ELM327 OBD-II scanner for live data streaming.
Instant translation of DTC codes to plain English with causes and fixes.
Real-time RPM, temp, O2 sensors on mobile dashboard.
Step-by-step mobile-friendly guides linked to specific codes.
One-tap PDF reports for clients with diagnostics and recommendations.
Store and search past scans by vehicle.
Save client vehicles with VIN and service history.
Send diagnostic summaries via SMS/email.
Cache common codes and guides for no-signal areas.
Predict future faults from trend data.
| Column | Type | Nullable |
|---|---|---|
| id | uuid | No |
| text | No | |
| subscription_tier | text | Yes |
| created_at | timestamp | No |
Relationships:
| Column | Type | Nullable |
|---|---|---|
| id | uuid | Yes |
| user_id | uuid | No |
| dtc_codes | text[] | Yes |
| vehicle_vin | text | Yes |
| data_json | jsonb | Yes |
| created_at | timestamp | No |
Relationships:
| Column | Type | Nullable |
|---|---|---|
| id | uuid | No |
| scan_id | uuid | No |
| pdf_url | text | No |
| share_token | text | No |
Relationships:
| Column | Type | Nullable |
|---|---|---|
| id | uuid | No |
| user_id | uuid | No |
| vin | text | No |
| make_model | text | Yes |
Relationships:
/api/scansCreate new scan from OBD data
/api/scans/:idGet scan details with decoded codes
/api/reportsGenerate report PDF
/api/reports/public/:tokenView public report
/api/vehiclesSave vehicle profile
/api/dashboard/liveStream live OBD data (SSE)
Watermarked reports
Up to 5 users
| Month | Users | Conversion | MRR | ARR |
|---|---|---|---|---|
| Month 1 | 50 | 2% | $35 | $420 |
| Month 6 | 400 | 5% | $700 | $8,400 |
Affordable OBD tool for mobile mechanics – scan, fix, bill independently.
Post in Facebook groups like 'Mobile Mechanics USA' and 'OBD Diagnostics Freelancers' offering free Pro access for feedback. DM 20 active posters in Reddit r/MechanicAdvice with pain-point matching profiles. Attend local auto freelancer meetups with QR code demo.
Cheap and feature-rich
No reports or guides, Android-only
SaaS with mobile reports, guides, cross-platform
Advanced plugins
Expensive add-ons, no freelancer tools
Subscription includes everything, repair-focused
Proprietary DTC database with freelancer-curated guides + data moat from scan histories.
Rise of cheap Bluetooth OBDs + aging vehicle fleets + gig economy boom for mobile repairs post-COVID.
Bluetooth inconsistencies across devices
Test on top 5 scanners, fallback to manual input
Low awareness of mobile diagnostics
Targeted ads in mechanic forums
Slow feature iteration
Prioritize MVP, user feedback loop
Success: 80% confirm willingness to pay $35
Success: 20% convert to trial
Success: >10% activation
Other validated startup ideas you might find interesting
Never miss TechCabal articles again—search and recover 404 pages instantly.
Your personal vault for TechCabal links—auto-recovers 404s forever.
AI revives lost TechCabal pages—summarize, rewrite, recover.
Get warm enterprise intros in days, not months for AI founders.
Auto-generate interactive enterprise demos that close deals faster.
AI crafts winning enterprise proposals that land meetings instantly.