# VinCheckUp vs Catalytic Converter Database

The clearest difference is rating: VinCheckUp at 4.2 against Catalytic Converter Database's 3.1. Catalytic Converter Database's advantage is review sentiment (50% vs 33%). On price, ratings volume, update cadence and ads there is nothing between them.

Both are free to download. VinCheckUp sells 4 one-off in-app purchases and Catalytic Converter Database sells 2 in-app purchases, starting at $24.99 per month. Whichever you choose, the download price is not the number that matters.

VinCheckUp holds the better App Store score, 4.2 against 3.1. Both are backed by a comparable volume of ratings — 41 and 20 respectively. Written reviews complicate that: 33% of VinCheckUp's written reviews are positive against 50% of Catalytic Converter Database's, so the app with the better star average is not the one people write more warmly about.

VinCheckUp ships an update every 3 months, Catalytic Converter Database every 2 months. The most recent releases landed on October 24, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | VinCheckUp | Catalytic Converter Database |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.2 (41 ratings)](https://appshunter.io/ios/app/vincheckup/id1400170275/reviews)** | [3.1 (20 ratings)](https://appshunter.io/ios/app/catalytic-converter-database/id1534897941/reviews) |
| Number of ratings | **41** | 20 |
| Positive reviews | 33.3% of reviews | **50.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 months** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 22 MB | 24 MB |
| Requires iOS | 15.1 | 15.1 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Cartrest LLC](https://appshunter.io/developer/1801860860) | [CONVERTERDATABASE LLC](https://appshunter.io/developer/1534897943) |

## What reviewers say

### VinCheckUp

[App page](https://appshunter.io/ios/app/vincheckup/id1400170275)

Access comprehensive vehicle history reports to uncover accident history, title brands, liens, and maintenance records. Make informed purchasing decisions by screening multiple vehicles before buying.

**Highlights:** Accident history reports, Title brand information, Lien and outstanding debt checks, Maintenance and service records, Vehicle specification details, Multi-vehicle screening

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Vehicle History Report | $9.99 | one-time |
| Full Vehicle History Report | $19.99 | one-time |
| 5 Vehicle History Reports | $39.99 | one-time |
| 10 Vehicle History Reports | $49.99 | one-time |


### Catalytic Converter Database

[App page](https://appshunter.io/ios/app/catalytic-converter-database/id1534897941)

Access a comprehensive database of catalytic converters with real-time pricing based on XRF values. Browse by manufacturer or code, view high-quality images, and stay updated with daily additions and market rate changes.

**Highlights:** Real-time pricing updated every 15 minutes, Daily additions of new converters, Advanced search by serial number or code, Browse by manufacturer and category, Multiple high-quality product images, Smooth animated image carousels

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Converter Database Monthly | $24.99 | per month |
| Converter Database Yearly | $249.99 | per year |


## Frequently asked questions

### Is VinCheckUp free?

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

### Is Catalytic Converter Database free?

Catalytic Converter Database is free to download, with in-app purchases available.

### Which has better reviews, VinCheckUp or Catalytic Converter Database?

VinCheckUp is rated higher. VinCheckUp averages 4.2 out of 5 from 41 ratings, while Catalytic Converter Database averages 3.1 from 20 ratings.

### Do VinCheckUp or Catalytic Converter Database have ads?

Neither VinCheckUp nor Catalytic Converter Database shows ads.

### Which is updated more often, VinCheckUp or Catalytic Converter Database?

VinCheckUp ships an update every 3 months, and Catalytic Converter Database every 2 months. Most recently, VinCheckUp was updated on October 24, 2026 and Catalytic Converter Database on October 27, 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.*