# Carista OBD2 vs YMOBD

The clearest difference is rating: Carista OBD2 at 4.6 against YMOBD's 2.9. Carista OBD2 also leads on ratings volume (4.3K vs 87) and chart position (#193 vs unranked). YMOBD's advantage is ads (none vs shown). On price, review sentiment, in-app purchases and monetization model there is nothing between them.

Both are free to download. Carista OBD2 sells 5 in-app purchases, starting at $19.99 per month and YMOBD sells 4 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Carista OBD2 holds the better App Store score, 4.6 against 2.9. That said, the two scores are not equally well evidenced: Carista OBD2 has 4.3K ratings behind it against 87, so its average is the more settled of the two. Written reviews complicate that: 34% of Carista OBD2's written reviews are positive against 36% of YMOBD's, so the app with the better star average is not the one people write more warmly about.

Carista OBD2 ships an update every 3 weeks, YMOBD every 5 weeks. The most recent releases landed on November 6, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Carista OBD2 | YMOBD |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (4.3K ratings)](https://appshunter.io/ios/app/carista-obd2/id954363569/reviews)** | [2.9 (87 ratings)](https://appshunter.io/ios/app/ymobd/id1627949735/reviews) |
| Number of ratings | **4.3K** | 87 |
| Positive reviews | 34.2% of reviews | **35.6% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 3 weeks** | Every 5 weeks |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Best chart rank | **#193** | — |
| Size | 141 MB | 49 MB |
| Requires iOS | 16.4 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [Prizmos](https://appshunter.io/developer/954363568) | [shenzhen yuming](https://appshunter.io/developer/1432795415) |

## What reviewers say

### Carista OBD2

[App page](https://appshunter.io/ios/app/carista-obd2/id954363569)

**Currently charting:** #193 Top Grossing · Utilities (US App Store)

Diagnose warning lights, reset fault codes, and monitor live vehicle data. Customize car features and perform DIY service procedures. Supports over 30 car brands and millions of users worldwide.

**Highlights:** Diagnose and reset fault codes, Monitor live vehicle data, Customize hidden car features, Perform DIY service procedures, Supports 30+ car brands, SFD & SFD2 compatibility

**Features:** Vision Pro support

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 Car – Monthly | $19.99 | per month |
| Pro | $19.99 | per month |
| 1 month Pro | $19.99 | per month |
| 3 month Pro | $29.99 | per 3 months |
| Pro | $59.99 | per year |

**What reviewers like**

- 🚀 Easy to use
- 👍 Customization options
- 🚀 Efficient diagnostics
- 💡 Helpful for maintenance
- 👍 Great customer support

**What reviewers complain about**

- 💰 Expensive subscription
- 🔒 Requires account login
- 🐛 Connectivity issues
- 🔒 Locked features behind paywall
- 🐛 Unreliable functionality

**Reported bugs**

- App crashes and freezes
- Subscription issues and billing problems
- Incompatibility with certain OBD2 adapters
- Customization features not working as expected
- Inaccurate fault code detection

**Requested features**

- Support for more vehicle makes and models
- Offline diagnostics and customization
- Ability to save customization settings
- More detailed error code information
- Improved user interface and navigation


### 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 Carista OBD2 free?

Carista OBD2 is free to download, with in-app purchases available.

### Is YMOBD free?

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

### Which has better reviews, Carista OBD2 or YMOBD?

Carista OBD2 is rated higher. Carista OBD2 averages 4.6 out of 5 from 4.3K ratings, while YMOBD averages 2.9 from 87 ratings.

### Do Carista OBD2 or YMOBD have ads?

Carista OBD2 shows ads; YMOBD does not.

### Which is updated more often, Carista OBD2 or YMOBD?

Carista OBD2 ships an update every 3 weeks, and YMOBD every 5 weeks. Most recently, Carista OBD2 was updated on November 6, 2026 and YMOBD on November 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.*