# J1939OBD vs Caption Pilot

The clearest difference is update cadence: Caption Pilot at monthly against J1939OBD's every 41 months. J1939OBD's advantage is iOS requirement (12.1 vs 18.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. J1939OBD sells 1 one-off in-app purchase and Caption Pilot sells 3 in-app purchases, starting at $6.99 per month. Whichever you choose, the download price is not the number that matters.

J1939OBD ships an update every 41 months, Caption Pilot monthly. The most recent releases landed on May 17, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | J1939OBD | Caption Pilot |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 41 months | **Monthly** |
| Size | 14 MB | 12 MB |
| Requires iOS | **12.1** | 18.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [S.Koepge](https://appshunter.io/developer/340731168) | [Web & Things LLC](https://appshunter.io/developer/1827985693) |

## What reviewers say

### J1939OBD

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

**Features:** macOS Compatibility

**In-app purchases (1)**

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


### Caption Pilot

[App page](https://appshunter.io/ios/app/caption-pilot/id6760238734)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Caption Pilot Pro Monthly | $6.99 | per month |
| Caption Pilot Pro Yearly | $49.99 | per year |
| Remove Ads | $4.99 | one-time |


## Frequently asked questions

### Is J1939OBD free?

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

### Is Caption Pilot free?

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

### Do J1939OBD or Caption Pilot have ads?

Neither J1939OBD nor Caption Pilot shows ads.

### Which is updated more often, J1939OBD or Caption Pilot?

J1939OBD ships an update every 41 months, and Caption Pilot monthly. Most recently, J1939OBD was updated on May 17, 2026 and Caption Pilot on September 18, 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.*