YMOBD vs Hengching
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
YMOBD
This tool connects to your car's OBD adapter via Bluetooth to collect real-time engine data, read fault codes, and provide solutions. It also records driving data, analyzes performance, and offers a HUD display for a safer and more enjoyable driving experience.
- Real-time engine data collection
- Vehicle fault code reading and solutions
- Driving data recording and analysis
- Vehicle performance testing (acceleration, braking)
- HUD display function
- Day and night modes
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YMOBD is a practical too. It has the characteristics of simple operation and accurate data, and is suitable for long-term use by car owners and users. Keep your car away from hidden dangers and make driving fun! Connect and communicate with the OBD adapter via Bluetooth: It can collect car engine data in real time, such as engine speed, ignition time, then correction, water temperature, fuel consumption, etc., with two modes of day and night, with HUD display function. It can read vehicle fault codes and provide professional solutions for detected vehicle fault codes. The driving process of the vehicle can be recorded every time. Analyze and summarize data such as mileage, average fuel consumption, driving time, and driving speed. It can test the acceleration, braking, and other performance of the vehicle, and provide analysis reports.
Hengching
This utility app helps you locate lost items using Bluetooth technology. It pairs with your devices to provide a finding function, ensuring your belongings are easily discoverable.
- Bluetooth item tracking
- Locate lost devices
- Integrated finding function
- Device pairing
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智能蓝牙防丢器 寻找防丢一体
Screenshots
Verdict
The clearest difference is rating: Hengching at 3.7 against YMOBD's 2.9. Hengching also leads on in-app purchases (none vs 4) and update cadence (fortnightly vs every 5 weeks). YMOBD's advantage is ratings volume (85 vs 6). On price, ads, device support and iOS requirement 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. YMOBD sells 4 one-off in-app purchases. Hengching asks for nothing beyond the download.
Hengching holds the better App Store score, 3.7 against 2.9. That said, the two scores are not equally well evidenced: YMOBD has 85 ratings behind it against 6, so its average is the more settled of the two. Written reviews point the same way: 34% of YMOBD's written reviews are positive against 43% of Hengching's.
YMOBD ships an update every 5 weeks, Hengching fortnightly. The most recent releases landed on September 25, 2026 and June 3, 2026 respectively.
| Parameter | YMOBD | Hengching |
|---|---|---|
| Price | Free | Free |
| Rating | 2.9 (85 ratings) | 3.7 (6 ratings) — better |
| Positive reviews | 34.3% of reviews | 42.9% of reviews — better |
| Number of ratings | 85 — better | 6 |
| Update frequency | Every 5 weeks | Fortnightly — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 15.0 | 14.0 — better |
| Further details — not scored | ||
| Size | 49 MB | 20 MB |
| Age rating | 4+ | 4+ |
| Developer | shenzhen yuming | 桂标 曾 |
Customer experience
YMOBD
Hengching
Bugs and requests
YMOBD
Reported bugs
15 issues- App crashes on iPhone 17 Pro
- Purchased add-on requires payment again
- Contact section not working
- App crashes every time on iPhone 17 Pro
- Does not connect at all
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- OBD2 reader not read by software
- No transmission temperature reading
- Bluetooth keeps disconnecting
- App says OBD is connected but doesn't show info
- Updated firmware, now won't connect
- App stopped working after update
- Rarely connects, disconnects when trying to get info
- Email not arriving for account creation
- Captcha not working/sending code
- Does not work on iOS 18
Requested features
10 requests- Dark Mode support
- Landscape mode support
- Store data for comparison over time
- Summary of vehicle diagnostics without connection
- Run in background feature
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- Weekly report of diagnostics
- Allow viewing diagnostic data in offline mode
- Remove need for model, make, year input for quick scans
- More frequent updates and optimizations
- Add landscape function in dashboard
Hengching
Not enough reviews yet to summarise bugs or requests.
In-app purchases
YMOBD
- 车辆年检模拟$0.99
- YMOBD-business expansion$1.99
- YMOBD-Battery monitoring$2.99
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- Super Car Sound$5.99
Hengching
No in-app purchases
