# YMOBD vs Hengching

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.

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.

## The numbers

| Metric | YMOBD | Hengching |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.9 (85 ratings)](https://appshunter.io/ios/app/ymobd/id1627949735/reviews) | **[3.7 (6 ratings)](https://appshunter.io/ios/app/hengching/id1643070977/reviews)** |
| Number of ratings | **85** | 6 |
| Positive reviews | 34.3% of reviews | **42.9% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Fortnightly** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 49 MB | 20 MB |
| Requires iOS | 15.0 | **14.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [shenzhen yuming](https://appshunter.io/developer/1432795415) | [桂标 曾](https://appshunter.io/developer/985954900) |

## What reviewers say

### YMOBD

[App page](https://appshunter.io/ios/app/ymobd/id1627949735)

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.

**Highlights:** 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

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 车辆年检模拟 | $0.99 | one-time |
| YMOBD-business expansion | $1.99 | one-time |
| YMOBD-Battery monitoring | $2.99 | one-time |
| Super Car Sound | $5.99 | one-time |

**What reviewers like**

- 👍 Works well with Toyota
- 👍 Accurate with many functions
- 👍 Amazing for fixing cars
- 👍 Useful for live data monitoring
- 👍 Great and very detailed

**What reviewers complain about**

- 🐛 Scam, pay again for add-on
- 🐛 Crashes on iPhone 17 Pro
- 🐛 Requires personal info sharing
- 🐛 Does not connect at all
- 🐛 Junk, doesn't read OBD2 reader

**Reported bugs**

- 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

**Requested features**

- Dark Mode support
- Landscape mode support
- Store data for comparison over time
- Summary of vehicle diagnostics without connection
- Run in background feature


### Hengching

[App page](https://appshunter.io/ios/app/hengching/id1643070977)

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.

**Highlights:** Bluetooth item tracking, Locate lost devices, Integrated finding function, Device pairing

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is YMOBD free?

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

### Is Hengching free?

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

### Which has better reviews, YMOBD or Hengching?

Hengching is rated higher. YMOBD averages 2.9 out of 5 from 85 ratings, while Hengching averages 3.7 from 6 ratings.

### Do YMOBD or Hengching have ads?

Neither YMOBD nor Hengching shows ads.

### Which is updated more often, YMOBD or Hengching?

YMOBD ships an update every 5 weeks, and Hengching fortnightly. Most recently, YMOBD was updated on September 25, 2026 and Hengching on June 3, 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.*