# J1939OBD vs Karpro

The clearest difference is in-app purchases: Karpro at none against J1939OBD's 1. Karpro also leads on update cadence (every 6 weeks vs every 41 months). J1939OBD's advantage is iOS requirement (12.1 vs 14.0). On price, ads and device support there is nothing between them.

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

J1939OBD ships an update every 41 months, Karpro every 6 weeks. The most recent releases landed on September 18, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | J1939OBD | Karpro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/karpro/id6717590358/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 41 months | **Every 6 weeks** |
| Monetization | — | Free |
| Size | 14 MB | 79 MB |
| Requires iOS | **12.1** | 14.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [S.Koepge](https://appshunter.io/developer/340731168) | [Karpro Corporation](https://appshunter.io/developer/1770460482) |

## 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 |


### Karpro

[App page](https://appshunter.io/ios/app/karpro/id6717590358)

Find and book local mechanics for car maintenance and repairs. Request quotes, schedule services, and make secure payments through an escrow system. Enjoy a transparent and convenient car repair experience.

**Highlights:** Find local mechanics, Request quotes, Schedule services, Secure escrow payments, Streamlined repair process

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


## Frequently asked questions

### Is J1939OBD free?

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

### Is Karpro free?

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

### Do J1939OBD or Karpro have ads?

Neither J1939OBD nor Karpro shows ads.

### Which is updated more often, J1939OBD or Karpro?

J1939OBD ships an update every 41 months, and Karpro every 6 weeks. Most recently, J1939OBD was updated on September 18, 2026 and Karpro on October 3, 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.*