# OBD Home vs EPA 608 Certification Prep

The clearest difference is in-app purchases: OBD Home at none against EPA 608 Certification Prep's 1. OBD Home also leads on iOS requirement (13 vs 17.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. EPA 608 Certification Prep sells 1 one-off in-app purchase. OBD Home asks for nothing beyond the download.

OBD Home ships an update every 3 weeks, EPA 608 Certification Prep every 2 weeks. The most recent releases landed on October 24, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | OBD Home | EPA 608 Certification Prep |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.9 (50 ratings)](https://appshunter.io/ios/app/obd-home/id6478903325/reviews)** | — |
| Number of ratings | **50** | — |
| Positive reviews | 31.6% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 2 weeks** |
| Monetization | Free | — |
| Size | 84 MB | 3 MB |
| Requires iOS | **13** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Shenzhen Chaoyue Technology Development Co.,Ltd](https://appshunter.io/developer/1223781320) | [Shanghai Sheyuan Network Technology Co., Ltd.](https://appshunter.io/developer/1560626858) |

## What reviewers say

### OBD Home

[App page](https://appshunter.io/ios/app/obd-home/id6478903325)

This application connects to your vehicle via Bluetooth to provide diagnostic and monitoring functions. It allows for fault code reading and clearing, performance testing, and travel analysis, offering a comprehensive view of your car's health and driving habits.

**Highlights:** Fault code reading and clearing, Instrument panel monitoring, Performance testing, Travel analysis, Bluetooth 4.0/5.0 support, High-speed data transmission

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

**In-app purchases:** none


### EPA 608 Certification Prep

[App page](https://appshunter.io/ios/app/epa-608-certification-prep/id6762461807)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Full Certification Prep | $9.99 | one-time |


## Frequently asked questions

### Is OBD Home free?

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

### Is EPA 608 Certification Prep free?

EPA 608 Certification Prep is free to download, with in-app purchases available.

### Do OBD Home or EPA 608 Certification Prep have ads?

Neither OBD Home nor EPA 608 Certification Prep shows ads.

### Which is updated more often, OBD Home or EPA 608 Certification Prep?

OBD Home ships an update every 3 weeks, and EPA 608 Certification Prep every 2 weeks. Most recently, OBD Home was updated on October 24, 2026 and EPA 608 Certification Prep on October 31, 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.*