# ScanMaster Lite vs OBD2 Scanner + Engine Sound

The clearest difference is ads: ScanMaster Lite at none against OBD2 Scanner + Engine Sound's shown. ScanMaster Lite also leads on ratings volume (6 vs 1). OBD2 Scanner + Engine Sound's advantage is update cadence (every 9 days vs every 5 months) and rating (4.0 vs 3.7). On price, in-app purchases, monetization model and device support there is nothing between them.

Both are free to download. ScanMaster Lite sells 3 in-app purchases, starting at $2.99 per 7 days and OBD2 Scanner + Engine Sound sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

OBD2 Scanner + Engine Sound holds the better App Store score, 4.0 against 3.7. That said, the two scores are not equally well evidenced: ScanMaster Lite has 6 ratings behind it against 1, so its average is the more settled of the two.

ScanMaster Lite ships an update every 5 months, OBD2 Scanner + Engine Sound every 9 days. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | ScanMaster Lite | OBD2 Scanner + Engine Sound |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.7 (6 ratings)](https://appshunter.io/ios/app/scanmaster-lite-elm327-obd-2/id6740844775/reviews) | **[4.0 (1 ratings)](https://appshunter.io/ios/app/obd2-scanner-plus-engine-sound/id6789023964/reviews)** |
| Number of ratings | **6** | 1 |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 5 months | **Every 9 days** |
| Monetization | Freemium | Free with in-app purchases |
| Size | 7 MB | 6 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [SMART Technologies GmBH](https://appshunter.io/developer/1320748539) | [Sena Takasawa](https://appshunter.io/developer/1887478690) |

## What reviewers say

### ScanMaster Lite

[App page](https://appshunter.io/ios/app/scanmaster-lite-elm327-obd-2/id6740844775)

Monitor your car's real-time data, diagnose issues, and enhance performance with this OBD2 scanner app. Connect via Bluetooth to an OBD2 device or ELM 327 adapter to read fault codes and gain insights into engine health and fuel efficiency.

**Highlights:** Real-time vehicle monitoring, Read and clear OBD-II fault codes, Car performance metrics, Wide vehicle compatibility, User-friendly interface, Connects with ELM327 adapters

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Weekly | $2.99 | per 7 days |
| Premium Monthly | $6.99 | per month |
| Premium Lifetime | $14.99 | one-time |


### OBD2 Scanner + Engine Sound

[App page](https://appshunter.io/ios/app/obd2-scanner-plus-engine-sound/id6789023964)

Monitor your car's engine performance and hear its sound in real-time. Customize your dashboard with various widgets and track your drives with detailed maps and trip data. Offers a demo mode and optional Pro features for an enhanced experience.

**Highlights:** Real-time OBD2 data display, Engine sound simulation based on RPM, Customizable dashboard with widgets, Trip computer and fuel economy tracking, Speed and RPM on map view, HUD mode for windshield projection

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $1.99 | one-time |
| car_ui Pro (One-Time) | $4.99 | one-time |


## Frequently asked questions

### Is ScanMaster Lite free?

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

### Is OBD2 Scanner + Engine Sound free?

OBD2 Scanner + Engine Sound is free to download, with in-app purchases available.

### Which has better reviews, ScanMaster Lite or OBD2 Scanner + Engine Sound?

OBD2 Scanner + Engine Sound is rated higher. ScanMaster Lite averages 3.7 out of 5 from 6 ratings, while OBD2 Scanner + Engine Sound averages 4.0 from 1 ratings.

### Do ScanMaster Lite or OBD2 Scanner + Engine Sound have ads?

OBD2 Scanner + Engine Sound shows ads; ScanMaster Lite does not.

### Which is updated more often, ScanMaster Lite or OBD2 Scanner + Engine Sound?

ScanMaster Lite ships an update every 5 months, and OBD2 Scanner + Engine Sound every 9 days. Most recently, ScanMaster Lite was updated on October 24, 2026 and OBD2 Scanner + Engine Sound on October 25, 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.*