Scan a California vehicle's license plate to view its smog test history and results. Verify the authenticity of smog certificates and access other useful vehicle information directly from the DMV.



211+ iOS apps & games curated and reviewed
The best smog test history apps and games on iPhone average 4.6★ across 211+ titles — we've ranked them by what real users actually keep on their phones. Updated May 2026.
| # | App | Price | Rating | Ads | In-App Purchases | Updated | |
|---|---|---|---|---|---|---|---|
| 1 | Free | 3.7★ (3) | No | No | May 2026 | ||
| 2 | Free | 4.7★ (789K) | No | No | Sep 2026 | ||
| 3 | Free | 4.8★ (44K) | No | No | Sep 2026 | ||
| 4 | Free | 4.6★ (27K) | Yes | No | Sep 2026 | ||
| 5 | Free | 4.7★ (15K) | No | No | Sep 2026 | ||
| 6 | Free | 4.7★ (11K) | No | Yes | Sep 2026 | ||
| 7 | Free | 4.8★ (2.2M) | Yes | Yes | Sep 2026 | ||
| 8 | Free | 4.6★ (1.5M) | Yes | Yes | Sep 2026 |



Scan a California vehicle's license plate to view its smog test history and results. Verify the authenticity of smog certificates and access other useful vehicle information directly from the DMV.





Easily test pre-release versions of apps and App Clips. Provide feedback to developers before public launch. Receive invites via email or public link.






Access real-time and forecasted air quality data for over 500,000 locations worldwide. Understand pollutant levels, receive health recommendations, and track wildfire and pollen information to plan your day safely.