# OBD JScan vs TopGuru

The clearest difference is review sentiment: OBD JScan at 80% against TopGuru's 29%. OBD JScan also leads on rating (4.7 vs 3.5) and ratings volume (1.3K vs 413). TopGuru's advantage is chart position (#163 vs unranked). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. OBD JScan sells 7 one-off in-app purchases and TopGuru sells 21 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

OBD JScan holds the better App Store score, 4.7 against 3.5. Both are backed by a comparable volume of ratings — 1.3K and 413 respectively. Written reviews point the same way: 80% of OBD JScan's written reviews are positive against 29% of TopGuru's.

Both ship on a similar rhythm, roughly every 3 weeks. Both last shipped on October 25, 2026.

## The numbers

| Metric | OBD JScan | TopGuru |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (1.3K ratings)](https://appshunter.io/ios/app/obd-jscan/id1445903514/reviews)** | [3.5 (413 ratings)](https://appshunter.io/ios/app/topguru/id6451488210/reviews) |
| Number of ratings | **1.3K** | 413 |
| Positive reviews | **79.6% of reviews** | 29.3% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Best chart rank | — | **#163** |
| Size | 403 MB | 2.2 GB |
| Requires iOS | **13.0** | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Piotr Bialic](https://appshunter.io/developer/960266498) | [HK TOPDON TECHNOLOGY Co., LIMITED](https://appshunter.io/developer/1846276192) |

## What reviewers say

### OBD JScan

[App page](https://appshunter.io/ios/app/obd-jscan/id1445903514)

This app provides advanced diagnostics for Jeep, Chrysler, and Dodge vehicles. It allows users to read and clear trouble codes, view live sensor data, and access settings across all vehicle modules, including ABS and transmission.

**Highlights:** Read/Clear Diagnostic Trouble Codes, Access Live Data from all sensors, View vehicle settings, Access all vehicle modules (ABS, Transmission, etc.), Identify module, VIN, Part Number, and Version, Share vehicle trouble codes

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

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| + 1 garage license | $9.99 | one-time |
| 1 VIN license | $20.99 | one-time |
| Add 1 VIN | $20.99 | one-time |
| Add 1 VIN Vehicle Slot | $20.99 | one-time |
| 3 VIN licenses | $54.99 | one-time |
| 5 VIN Licenses | $84.99 | one-time |
| 10 VIN Licenses | $149.99 | one-time |

**What reviewers like**

- 🚀 Easy to use
- 🔧 Powerful customization options
- 👍 Excellent customer support
- 💡 Useful diagnostic and monitoring features
- 🔓 Enables features otherwise locked by dealer

**What reviewers complain about**

- 🐛 Occasional connectivity issues
- 🔌 Requires additional hardware purchase
- ⚠️ Compatibility issues with newer vehicle models
- 🕰️ Slow performance in certain scenarios

**Reported bugs**

- Inability to save/export diagnostic data
- Inconsistent behavior when changing vehicle settings

**Requested features**

- Expanded vehicle compatibility
- Improved stability and reliability
- Enhanced user interface and guidance
- Integration with other vehicle apps/services


### TopGuru

[App page](https://appshunter.io/ios/app/topguru/id6451488210)

**Currently charting:** #163 Top Grossing · Utilities (US App Store)

Transform your phone or tablet into a powerful vehicle diagnostic tool via Bluetooth. Access full system diagnosis, OBDII functions, bi-directional controls, and essential maintenance services for a wide range of car brands. Generate detailed diagnostic reports for efficient troubleshooting.

**Highlights:** Full System Diagnosis, Full OBD2 Functions, Bi-directional Control, 8 Special Maintenance Functions, AutoVIN Vehicle Identification, Diagnostic Report Generation, Wireless Bluetooth 5.0 Connection

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

**In-app purchases (21)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Auto-renewal | $9.99 | per month |
| Monthly Auto-renewal | $19.00 | per month |
| Quarterly Auto-renewal | $24.99 | per 3 months |
| Annual Auto-renewal | $49.99 | per year |
| Annual Auto-renewal | $99.00 | per year |
| Renault Gateway  1-Token | $11.99 | one-time |
| Diag Bundle Renewal | $49.99 | one-time |
| TopGuru Diagnostic Bundle | $49.99 | one-time |
| TopGuru IMMO Bundle | $49.99 | one-time |
| Renewal Bundle | $99.00 | one-time |
| TopScan Pro Renewal Bundle | $99.00 | one-time |
| Harley Moto Software | $99.99 | one-time |
| Harley Moto Software Renewal | $99.99 | one-time |
| Moto Diag Bundle Renewal-Moto | $99.99 | one-time |
| Moto Diag Bundle | $99.99 | one-time |
| Moto Diag Bundle Renewal | $99.99 | one-time |
| 22 Special Functions Bundle | $129.99 | one-time |
| Renault Gateway 10 Tokens | $129.99 | one-time |
| Renault Gateway 5 Tokens | $147.99 | one-time |
| 17 Special Functions Bundle | $179.00 | one-time |
| FCA Gateway 1-year (EU only) | $229.99 | one-time |

**What reviewers like**

- 👍 Works well on most vehicles
- 🚀 Powerful features for the price
- 💡 Useful for DIY and professional mechanics

**What reviewers complain about**

- 🐛 Frequent app crashes and bugs
- ⏱️ Slow and cumbersome to use due to constant updates
- 🔒 Concerns about data privacy and security
- 💰 Subscription model after initial purchase

**Reported bugs**

- Incompatibility with certain vehicle models
- Login and account issues
- Unreliable Bluetooth connectivity

**Requested features**

- iPad optimization and full-screen support
- Expanded vehicle coverage, especially for motorcycles
- Ability to save and export diagnostic data


## Frequently asked questions

### Is OBD JScan free?

OBD JScan is free to download, with in-app purchases available.

### Is TopGuru free?

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

### Which has better reviews, OBD JScan or TopGuru?

OBD JScan is rated higher. OBD JScan averages 4.7 out of 5 from 1.3K ratings, while TopGuru averages 3.5 from 413 ratings.

### Do OBD JScan or TopGuru have ads?

Neither OBD JScan nor TopGuru shows ads.

### Which is updated more often, OBD JScan or TopGuru?

OBD JScan ships an update every 3 weeks, and TopGuru every 3 weeks. Most recently, OBD JScan was updated on October 25, 2026 and TopGuru 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.*