# VDIAGTOOL vs VIN Decode RPO

The clearest difference is rating: VIN Decode RPO at 4.8 against VDIAGTOOL's 2.8. VIN Decode RPO also leads on update cadence (every 3 days vs every 3 weeks) and ratings volume (45 vs 8). VDIAGTOOL's advantage is monetization model (free vs ad-supported). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

VIN Decode RPO holds the better App Store score, 4.8 against 2.8. That said, the two scores are not equally well evidenced: VIN Decode RPO has 45 ratings behind it against 8, so its average is the more settled of the two.

VDIAGTOOL ships an update every 3 weeks, VIN Decode RPO every 3 days. Both last shipped on November 5, 2026.

## The numbers

| Metric | VDIAGTOOL | VIN Decode RPO |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.8 (8 ratings)](https://appshunter.io/ios/app/vdiagtool/id6751025207/reviews) | **[4.8 (45 ratings)](https://appshunter.io/ios/app/vin-decode-rpo/id6759104746/reviews)** |
| Number of ratings | 8 | **45** |
| Positive reviews | 40.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 3 days** |
| Monetization | **Free** | Ad-supported |
| Size | 1.1 GB | 57 MB |
| Requires iOS | **15.6** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Shenzhen VDIAGTOOL Technology Co., Ltd](https://appshunter.io/developer/1833169281) | [Vyacheslav Kravchina](https://appshunter.io/developer/1738469819) |

## What reviewers say

### VDIAGTOOL

[App page](https://appshunter.io/ios/app/vdiagtool/id6751025207)

This app provides comprehensive vehicle diagnostics, acting as a portable, professional solution. It connects to a Bluetooth OBDII adapter for full-system scanning and special functions on various car brands.

**Highlights:** Full-system vehicle diagnostics, Professional special functions (oil reset, DPF regen, EPB), High-speed Bluetooth OBDII adapter included, Portable, pocket-sized design, Cross-platform iOS compatibility

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

**In-app purchases:** none


### VIN Decode RPO

[App page](https://appshunter.io/ios/app/vin-decode-rpo/id6759104746)

Instantly decode GM vehicle RPO codes by scanning the QR code on your vehicle's label. Get a clear list of factory options installed on your car, making it easy to understand its specifications. Supports 2017 and newer model years.

**Highlights:** Scan GM vehicle QR codes, Decode RPO (Regular Production Option) codes, Get clear descriptions of factory options, Supports 2017+ model years, Simple and intuitive interface

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

**In-app purchases:** none


## Frequently asked questions

### Is VDIAGTOOL free?

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

### Is VIN Decode RPO free?

VIN Decode RPO is free to download, with no in-app purchases.

### Which has better reviews, VDIAGTOOL or VIN Decode RPO?

VIN Decode RPO is rated higher. VDIAGTOOL averages 2.8 out of 5 from 8 ratings, while VIN Decode RPO averages 4.8 from 45 ratings.

### Do VDIAGTOOL or VIN Decode RPO have ads?

Neither VDIAGTOOL nor VIN Decode RPO shows ads.

### Which is updated more often, VDIAGTOOL or VIN Decode RPO?

VDIAGTOOL ships an update every 3 weeks, and VIN Decode RPO every 3 days. Most recently, VDIAGTOOL was updated on November 5, 2026 and VIN Decode RPO on November 5, 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.*