# SYTTPMS vs YMOBD

The clearest difference is in-app purchases: SYTTPMS at none against YMOBD's 4. SYTTPMS also leads on iOS requirement (13.0 vs 15.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. YMOBD sells 4 one-off in-app purchases. SYTTPMS asks for nothing beyond the download.

SYTTPMS ships an update every 2 months, YMOBD every 5 weeks. The most recent releases landed on October 1, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | SYTTPMS | YMOBD |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[2.9 (86 ratings)](https://appshunter.io/ios/app/ymobd/id1627949735/reviews)** |
| Number of ratings | — | **86** |
| Positive reviews | — | 34.3% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 5 weeks** |
| Monetization | — | Free with in-app purchases |
| Size | 1 MB | 49 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Shenzhen Shenyongtong Industry Co., Ltd.](https://appshunter.io/developer/776724937) | [shenzhen yuming](https://appshunter.io/developer/1432795415) |

## What reviewers say

### SYTTPMS

[App page](https://appshunter.io/ios/app/syttpms/id1031107627)

**Features:** macOS Compatibility

**In-app purchases:** none


### 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


## Frequently asked questions

### Is SYTTPMS free?

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

### Is YMOBD free?

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

### Do SYTTPMS or YMOBD have ads?

Neither SYTTPMS nor YMOBD shows ads.

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

SYTTPMS ships an update every 2 months, and YMOBD every 5 weeks. Most recently, SYTTPMS was updated on October 1, 2026 and YMOBD on October 8, 2026.

---

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