# J1939OBD vs BlueButton

The clearest difference is in-app purchases: BlueButton at none against J1939OBD's 1. On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. J1939OBD sells 1 one-off in-app purchase. BlueButton asks for nothing beyond the download.

## The numbers

| Metric | J1939OBD | BlueButton |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 41 months | — |
| Monetization | Free | — |
| Size | 14 MB | 2 MB |
| Requires iOS | **12.1** | 13.2 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [S.Koepge](https://appshunter.io/developer/340731168) | [tomcom GmbH](https://appshunter.io/developer/397619175) |

## What reviewers say

### J1939OBD

[App page](https://appshunter.io/ios/app/j1939obd/id1453435912)

This diagnostic app connects to industrial and commercial vehicle engines via the J1939 CAN protocol. It allows users to view and clear error codes, monitor engine performance metrics, and access information on DPF and SCR systems. Requires a compatible WiFi OBD interface and connection cable.

**Highlights:** Display active and passive error codes, Delete error codes, Display engine measured values, DPF and SCR system status, Fuel consumption information, Engine information, Terminal mode

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Get full access for 1939OBD | $3.99 | one-time |


### BlueButton

[App page](https://appshunter.io/ios/app/bluebutton/id1531467451)

**In-app purchases:** none


## Frequently asked questions

### Is J1939OBD free?

J1939OBD is free to download, with in-app purchases available.

### Is BlueButton free?

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

### Do J1939OBD or BlueButton have ads?

Neither J1939OBD nor BlueButton shows ads.

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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.*