Advancer AD20 vs Firstnum
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Advancer AD20
This app connects to a smart OBD dongle to provide vehicle health checks, diagnosis, and real-time monitoring. It helps identify fault codes, analyze driving habits, and offers maintenance reminders for enhanced driving safety.
- OBD-II Diagnosis
- In-depth system check
- Live vehicle data monitoring
- Maintenance light reset
- Trip recorder
- Driving habits analysis
Read full descriptionHide full description
Advancer Smart OBD Dongle (AD20/AD20 Pro) is a smart diagnosis terminal that communicates with your iOS devices via BT 5.0. With the Advancer app, AD20 provides services like vehicle health check, diagnosis, driving habits analysis for car owners. Help the vehicle owner to check at any time whether the vehicle is out of order, display the cause of the fault and maintenance suggestions, monitor the status of the vehicle in real time and alert the safety hazards early to ensure your driving safety 1)OBD-II Diagnosis Advancer AD20 can read and categorize the fault codes (DTCs) that storage inside the vehicle ECU via standard OBD-II protocols. 2)In-depth Check In-depth check function allows you to do thorough check on vehicle systems like engine, powertrain, brakes, steering, safety, infotainment and so on, which helps owners to know the health condition of the car clearly and provide safe and comfortable driving experience on travels. Note: In-depth check on all systems is only supported on AD20 Pro; AD20 supports in-depth check on engine only. 3)Live Data When the car is started, Advancer will provide and demonstrate detailed vehicle status like battery voltage, engine revolution speed, coolant temperature, engine load, fuel trimming and so on. This will help you to get the real-time working conditions of the car. 4)Maintenance Light Reset Reset the maintenance counter and turn off the maintenance light after finishing maintenance. For your driving safety, make sure you have followed the manual when doing maintenance to your own car. Note: Maintenance light is a reminder set by car manufacturer, which reminds drivers to do maintenances when needed. When the reminder is on, the car will show info on the dashboard screen, or simply shows a light. 5)Trip Recorder When driving, Advancer will record the index like average speed, fuel consumption, mileage, max engine revolution speed, max coolant temperature and shows them on the app. This will help you to know vehicle status and fuel consumption info on the entire trip. 6)Driving Habits Monitor With the G-sensors inside Advancer, all the sharp turns, emergency brakes and sudden accelerations will be recorded and shown on the app after analyzed. This function will provide data support if you are willing to improve your driving skills.
Firstnum
This utility app is designed for managing device access and logins. It helps users securely log in to control their devices.
- Device login management
- Secure access control
- User authentication
Read full descriptionHide full description
Used for logging in to manage the device
Screenshots
Verdict
The clearest difference is review sentiment: Firstnum at 100% against Advancer AD20's 14%. Firstnum also leads on rating (3.0 vs 2.4). Advancer AD20's advantage is ratings volume (62 vs 2). On price, update cadence, ads and in-app purchases there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Firstnum holds the better App Store score, 3.0 against 2.4. That said, the two scores are not equally well evidenced: Advancer AD20 has 62 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 14% of Advancer AD20's written reviews are positive against 100% of Firstnum's.
Advancer AD20 ships an update monthly, Firstnum every 5 weeks. The most recent releases landed on September 17, 2026 and September 3, 2026 respectively.
| Parameter | Advancer AD20 | Firstnum |
|---|---|---|
| Price | Free | Free |
| Rating | 2.4 (62 ratings) | 3.0 (2 ratings) — better |
| Positive reviews | 13.9% of reviews | 100.0% of reviews — better |
| Number of ratings | 62 — better | 2 |
| Update frequency | Monthly — better | Every 5 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 — better | 13 |
| Further details — not scored | ||
| Size | 496 MB | 88 MB |
| Age rating | 12+ | 17+ |
| Developer | 深圳市云伽未来智能技术有限公司 | ShangHai Stoneoim Intelligent Technology Co.,Ltd |
Customer experience
Advancer AD20
Firstnum
In-app purchases
Advancer AD20
No in-app purchases
Firstnum
No in-app purchases









