# KBI CatApp vs PureZone

The clearest difference is update cadence: PureZone at monthly against KBI CatApp's every 9 months. 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.

KBI CatApp ships an update every 9 months, PureZone monthly. The most recent releases landed on October 9, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | KBI CatApp | PureZone |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (2 ratings)](https://appshunter.io/ios/app/kbi-catapp/id6444090674/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 months | **Monthly** |
| Monetization | Free | — |
| Size | 54 MB | 73 MB |
| Requires iOS | 16.4 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Kinsbursky Bros. Supply, Inc.](https://appshunter.io/developer/1472290520) | [Premium Guard Inc.](https://appshunter.io/developer/1556625190) |

## What reviewers say

### KBI CatApp

[App page](https://appshunter.io/ios/app/kbi-catapp/id6444090674)

Access a comprehensive database of catalytic converter prices, updated daily based on real-time market data and in-house laboratory analysis. Find accurate valuations for your converters.

**Highlights:** Extensive catalytic converter price list, Daily price updates, In-house laboratory analysis, XRF and ICP instrumentation data, Market-based pricing (platinum, palladium, rhodium)

**Features:** Vision Pro support

**In-app purchases:** none


### PureZone

[App page](https://appshunter.io/ios/app/purezone/id6473235761)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is KBI CatApp free?

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

### Is PureZone free?

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

### Do KBI CatApp or PureZone have ads?

Neither KBI CatApp nor PureZone shows ads.

### Which is updated more often, KBI CatApp or PureZone?

KBI CatApp ships an update every 9 months, and PureZone monthly. Most recently, KBI CatApp was updated on October 9, 2026 and PureZone on October 17, 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.*