# OBD JScan vs TrafoCalc

The clearest difference is price: OBD JScan at Free against TrafoCalc's $0.99. OBD JScan also leads on iOS requirement (13.0 vs 18.2). TrafoCalc's advantage is in-app purchases (none vs 8) and update cadence (every 9 days vs every 3 weeks). On ads and device support there is nothing between them.

OBD JScan is free to download; TrafoCalc costs $0.99 up front. OBD JScan sells 7 one-off in-app purchases. TrafoCalc asks for nothing beyond the download.

OBD JScan ships an update every 3 weeks, TrafoCalc every 9 days. The most recent releases landed on October 16, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | OBD JScan | TrafoCalc |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | **[4.7 (1.3K ratings)](https://appshunter.io/ios/app/obd-jscan/id1445903514/reviews)** | — |
| Number of ratings | **1.3K** | — |
| Positive reviews | 79.6% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 9 days** |
| Monetization | Free with in-app purchases | — |
| Size | 403 MB | 4 MB |
| Requires iOS | **13.0** | 18.2 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 12+ | 4+ |
| Developer | [Piotr Bialic](https://appshunter.io/developer/960266498) | [Mohd Dahnial Ismail](https://appshunter.io/developer/1868973164) |

## 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


### TrafoCalc

[App page](https://appshunter.io/ios/app/trafocalc/id6757797482)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is OBD JScan free?

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

### Is TrafoCalc free?

TrafoCalc costs $0.99, with no in-app purchases.

### Do OBD JScan or TrafoCalc have ads?

Neither OBD JScan nor TrafoCalc shows ads.

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

OBD JScan ships an update every 3 weeks, and TrafoCalc every 9 days. Most recently, OBD JScan was updated on October 16, 2026 and TrafoCalc on October 10, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*