# OBD Plus vs ScanMaster Lite

The clearest difference is in-app purchases: OBD Plus at none against ScanMaster Lite's 3. OBD Plus also leads on update cadence (every 4 weeks vs every 5 months) and review sentiment (22% vs 0%). ScanMaster Lite's advantage is rating (3.7 vs 3.3). On price, ratings volume, ads 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. OBD Plus asks for nothing beyond the download.

ScanMaster Lite holds the better App Store score, 3.7 against 3.3. Both are backed by a comparable volume of ratings — 4 and 6 respectively. Written reviews complicate that: 22% of OBD Plus's written reviews are positive against 0% of ScanMaster Lite's, so the app with the better star average is not the one people write more warmly about.

OBD Plus ships an update every 4 weeks, ScanMaster Lite every 5 months. Both last shipped on September 21, 2026.

## The numbers

| Metric | OBD Plus | ScanMaster Lite |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.3 (4 ratings)](https://appshunter.io/ios/app/obd-plus/id1208901144/reviews) | **[3.7 (6 ratings)](https://appshunter.io/ios/app/scanmaster-lite-elm327-obd-2/id6740844775/reviews)** |
| Number of ratings | 4 | **6** |
| Positive reviews | **21.9% of reviews** | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 4 weeks** | Every 5 months |
| Monetization | **Free** | Freemium |
| Size | 30 MB | 7 MB |
| Requires iOS | **8.0** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Shenzhen Leagend Optoelectronics Co., Ltd.](https://appshunter.io/developer/6798210621) | [SMART Technologies GmBH](https://appshunter.io/developer/1320748539) |

## What reviewers say

### OBD Plus

[App page](https://appshunter.io/ios/app/obd-plus/id1208901144)

Monitor your vehicle's engine, emissions, and other critical systems. This app aids in diagnosing car issues and provides insights into various components for better car maintenance.

**Highlights:** Vehicle condition monitoring, Car diagnostics, Engine system monitoring, Emission control system analysis, Oxygen sensor monitoring, Fuel system analysis

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is OBD Plus free?

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

### Is ScanMaster Lite free?

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

### Which has better reviews, OBD Plus or ScanMaster Lite?

ScanMaster Lite is rated higher. OBD Plus averages 3.3 out of 5 from 4 ratings, while ScanMaster Lite averages 3.7 from 6 ratings.

### Do OBD Plus or ScanMaster Lite have ads?

Neither OBD Plus nor ScanMaster Lite shows ads.

### Which is updated more often, OBD Plus or ScanMaster Lite?

OBD Plus ships an update every 4 weeks, and ScanMaster Lite every 5 months. Most recently, OBD Plus was updated on September 21, 2026 and ScanMaster Lite on September 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.*