# Carista OBD2 vs MODI Mobile Diagnostics

The clearest difference is in-app purchases: MODI Mobile Diagnostics at none against Carista OBD2's 14. MODI Mobile Diagnostics also leads on ads (none vs shown). Carista OBD2's advantage is review sentiment (34% vs 0%) and chart position (#166 vs unranked). On price, update cadence, device support and iOS requirement there is nothing between them.

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

Carista OBD2 ships an update every 3 weeks, MODI Mobile Diagnostics monthly. The most recent releases landed on October 26, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | Carista OBD2 | MODI Mobile Diagnostics |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (4.2K ratings)](https://appshunter.io/ios/app/carista-obd2/id954363569/reviews)** | — |
| Number of ratings | **4.2K** | — |
| Positive reviews | **34.2% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 3 weeks** | Monthly |
| Monetization | Free with in-app purchases | **Free** |
| Best chart rank | **#166** | — |
| Size | 142 MB | 66 MB |
| Requires iOS | 16.4 | **15.6** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [Prizmos](https://appshunter.io/developer/954363568) | [MODI Abrites Ltd.](https://appshunter.io/developer/1779687917) |

## What reviewers say

### Carista OBD2

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

**Currently charting:** #166 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


### MODI Mobile Diagnostics

[App page](https://appshunter.io/ios/app/modi-mobile-diagnostics/id1459081087)

This app provides advanced diagnostic and customization options for vehicles. It allows users to read and clear trouble codes, view live data, perform module scans, and unlock coding features for various car brands. A health report feature helps identify potential issues before trips.

**Highlights:** Vehicle diagnostics, Read and clear diagnostic trouble codes, Live data display, Module scan, Coding and customization, Health Report

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Carista OBD2 free?

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

### Is MODI Mobile Diagnostics free?

MODI Mobile Diagnostics is free to download, with no in-app purchases.

### Do Carista OBD2 or MODI Mobile Diagnostics have ads?

Carista OBD2 shows ads; MODI Mobile Diagnostics does not.

### Which is updated more often, Carista OBD2 or MODI Mobile Diagnostics?

Carista OBD2 ships an update every 3 weeks, and MODI Mobile Diagnostics monthly. Most recently, Carista OBD2 was updated on October 26, 2026 and MODI Mobile Diagnostics on October 4, 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.*