# Carista OBD2 vs Defunc

The clearest difference is rating: Carista OBD2 at 4.6 against Defunc's 1.0. Carista OBD2 also leads on review sentiment (34% vs 0%) and ratings volume (4.2K vs 1). Defunc's advantage is in-app purchases (none vs 14) and ads (none vs shown). On price, update cadence and device support there is nothing between them.

Both are free to download. Carista OBD2 sells 6 in-app purchases, starting at $19.99 per month. Defunc asks for nothing beyond the download.

Carista OBD2 holds the better App Store score, 4.6 against 1.0. That said, the two scores are not equally well evidenced: Carista OBD2 has 4.2K ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 34% of Carista OBD2's written reviews are positive against 0% of Defunc's.

Carista OBD2 ships an update every 3 weeks, Defunc every 5 weeks. The most recent releases landed on October 24, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | Carista OBD2 | Defunc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (4.2K ratings)](https://appshunter.io/ios/app/carista-obd2/id954363569/reviews)** | [1.0 (1 ratings)](https://appshunter.io/ios/app/defunc/id6450643468/reviews) |
| Number of ratings | **4.2K** | 1 |
| Positive reviews | **34.2% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 3 weeks** | Every 5 weeks |
| Monetization | Free with in-app purchases | **Free** |
| Best chart rank | **#156** | — |
| Size | 142 MB | 41 MB |
| Requires iOS | 16.4 | **12.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Prizmos](https://appshunter.io/developer/954363568) | [The Art of Utility AB](https://appshunter.io/developer/1575861817) |

## What reviewers say

### Carista OBD2

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

**Currently charting:** #156 Top Grossing · Utilities (US App Store)

This app acts as a DIY car mechanic, allowing you to customize features, diagnose warning lights, monitor live data, and perform maintenance. Save time and money by handling common car tasks yourself.

**Highlights:** Customize car behavior and unlock hidden features, Diagnose and reset dashboard warning lights, Monitor real-time vehicle parameters, Perform simple DIY car maintenance procedures, Access advanced electronic diagnostics

**Features:** Vision Pro support

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Basic | $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 |
| One-Time Diagnostic & Reset | $9.99 | one-time |

**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


### Defunc

[App page](https://appshunter.io/ios/app/defunc/id6450643468)

Personalize your audio experience with custom sound settings and EQ presets. Access user manuals, shop for new products, and locate lost earbuds directly within the app.

**Highlights:** Personalized sound profiles, EQ presets by genre, In-app user manuals, Product shopping links, Earbud location tracking, Customizable sound settings

**In-app purchases:** none


## Frequently asked questions

### Is Carista OBD2 free?

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

### Is Defunc free?

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

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

Carista OBD2 is rated higher. Carista OBD2 averages 4.6 out of 5 from 4.2K ratings, while Defunc averages 1.0 from 1 ratings.

### Do Carista OBD2 or Defunc have ads?

Carista OBD2 shows ads; Defunc does not.

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

Carista OBD2 ships an update every 3 weeks, and Defunc every 5 weeks. Most recently, Carista OBD2 was updated on October 24, 2026 and Defunc on October 21, 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.*