# MemoPass vs J1939FaultCode

The clearest difference is in-app purchases: MemoPass at none against J1939FaultCode's 1. MemoPass also leads on ads (none vs shown) and device support (3 vs 1). On price, update cadence and iOS requirement there is nothing between them.

Both are free to download. J1939FaultCode sells 1 one-off in-app purchase. MemoPass asks for nothing beyond the download.

MemoPass ships an update every 2 weeks, J1939FaultCode fortnightly. The most recent releases landed on October 27, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | MemoPass | J1939FaultCode |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 2 weeks** | Fortnightly |
| Size | 238 MB | 14 MB |
| Requires iOS | **15.6** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [PRT SISTEMI SRL](https://appshunter.io/developer/972429077) | [洋 刘](https://appshunter.io/developer/6775317751) |

## What reviewers say

### MemoPass

[App page](https://appshunter.io/ios/app/memopass/id6504022461)

**Features:** macOS Compatibility

**In-app purchases:** none


### J1939FaultCode

[App page](https://appshunter.io/ios/app/j1939faultcode/id6778431735)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| J1939 Pro | $2.99 | one-time |


## Frequently asked questions

### Is MemoPass free?

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

### Is J1939FaultCode free?

J1939FaultCode is free to download, with in-app purchases available.

### Do MemoPass or J1939FaultCode have ads?

J1939FaultCode shows ads; MemoPass does not.

### Which is updated more often, MemoPass or J1939FaultCode?

MemoPass ships an update every 2 weeks, and J1939FaultCode fortnightly. Most recently, MemoPass was updated on October 27, 2026 and J1939FaultCode on October 28, 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.*