# Advancer AD20 vs TOPDON CarPal

The clearest difference is rating: TOPDON CarPal at 3.7 against Advancer AD20's 2.4. TOPDON CarPal also leads on review sentiment (39% vs 14%). Advancer AD20's advantage is in-app purchases (none vs 10) and iOS requirement (13.0 vs 15.0). On price, ratings volume, update cadence and ads there is nothing between them.

Both are free to download. TOPDON CarPal sells 10 in-app purchases, starting at $4.99 per month. Advancer AD20 asks for nothing beyond the download.

TOPDON CarPal holds the better App Store score, 3.7 against 2.4. Both are backed by a comparable volume of ratings — 65 and 45 respectively. Written reviews point the same way: 14% of Advancer AD20's written reviews are positive against 39% of TOPDON CarPal's.

Advancer AD20 ships an update monthly, TOPDON CarPal every 3 weeks. The most recent releases landed on November 3, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | Advancer AD20 | TOPDON CarPal |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.4 (65 ratings)](https://appshunter.io/ios/app/advancer-ad20/id6444664990/reviews) | **[3.7 (45 ratings)](https://appshunter.io/ios/app/topdon-carpal/id6478524922/reviews)** |
| Number of ratings | **65** | 45 |
| Positive reviews | 13.9% of reviews | **39.3% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 3 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 533 MB | 3.1 GB |
| Requires iOS | **13.0** | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 12+ | 4+ |
| Developer | [深圳市云伽未来智能技术有限公司](https://appshunter.io/developer/1638728786) | [HK TOPDON TECHNOLOGY Co., LIMITED](https://appshunter.io/developer/1846276192) |

## What reviewers say

### Advancer AD20

[App page](https://appshunter.io/ios/app/advancer-ad20/id6444664990)

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.

**Highlights:** OBD-II Diagnosis, In-depth system check, Live vehicle data monitoring, Maintenance light reset, Trip recorder, Driving habits analysis

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 👍 Easy installation and pairing
- 👍 Straightforward iPad pairing
- 👍 Full diagnostic capabilities
- 👍 Satisfied with results
- 👍 Works as expected for some users

**What reviewers complain about**

- 🐛 Cannot connect to device
- 🐛 Scanner tied to another account
- 🐛 Required account creation
- 🐛 Invalid email for account creation
- 🐛 Does not connect to specific car models

**Reported bugs**

- Cannot connect to scanner
- Scanner tied to another account
- Account creation issues (invalid email)
- Device stops working after registration
- Login timeouts

**Requested features**

- Add more languages, including Chinese
- Improve information availability for various car models
- Fix issues with iOS updates
- Improve app layout and navigation
- Increase text size and contrast


### TOPDON CarPal

[App page](https://appshunter.io/ios/app/topdon-carpal/id6478524922)

Transform your phone into a powerful car diagnostic tool with this app. It offers comprehensive system scans, full OBDII functionality, and specialized maintenance services for a wide range of vehicle brands. Easily identify issues, access repair data, and generate detailed reports wirelessly.

**Highlights:** Full System Diagnosis, Full OBD2 Functions, 6 Special Maintenance Functions, AutoVIN Vehicle Identification, Wireless Bluetooth Connection, Diagnostic Report Generation

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Auto-renewal | $4.99 | per month |
| Renewal Bundle | $29.99 | per year |
| Renault Gateway  1-Token | $11.99 | one-time |
| VW SFD Gateway  1-Token | $11.99 | one-time |
| FCA Gateway  1-Token | $11.99 | one-time |
| FCA Gateway 30-day Access | $34.99 | one-time |
| VW SFD Gateway 30-day Access | $34.99 | one-time |
| Renault Gateway 5 Tokens | $116.99 | one-time |
| Renault Gateway 5 Tokens | $147.99 | one-time |
| VW SFD Gateway 1-year Access | $199.99 | one-time |


## Frequently asked questions

### Is Advancer AD20 free?

Advancer AD20 is free to download, with no in-app purchases.

### Is TOPDON CarPal free?

TOPDON CarPal is free to download, with in-app purchases available.

### Which has better reviews, Advancer AD20 or TOPDON CarPal?

TOPDON CarPal is rated higher. Advancer AD20 averages 2.4 out of 5 from 65 ratings, while TOPDON CarPal averages 3.7 from 45 ratings.

### Do Advancer AD20 or TOPDON CarPal have ads?

Neither Advancer AD20 nor TOPDON CarPal shows ads.

### Which is updated more often, Advancer AD20 or TOPDON CarPal?

Advancer AD20 ships an update monthly, and TOPDON CarPal every 3 weeks. Most recently, Advancer AD20 was updated on November 3, 2026 and TOPDON CarPal on November 4, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*