# ETS RF Quick Reference vs KBI CatApp

ETS RF Quick Reference and KBI CatApp are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

Both ship on a similar rhythm, roughly every 7 months. The most recent releases landed on September 9, 2026 and June 1, 2026 respectively.

## The numbers

| Metric | ETS RF Quick Reference | KBI CatApp |
| --- | --- | --- |
| 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 7 months | Every 7 months |
| Monetization | — | Free |
| Size | 10 MB | 8 MB |
| Requires iOS | 14.0 | 14.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Emerging Technology Support, LLC](https://appshunter.io/developer/1570653621) | [Kinsbursky Bros. Supply, Inc.](https://appshunter.io/developer/1472290520) |

## What reviewers say

### ETS RF Quick Reference

[App page](https://appshunter.io/ios/app/ets-rf-quick-reference/id1570653619)

**In-app purchases:** none


### 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)

**In-app purchases:** none


## Frequently asked questions

### Is ETS RF Quick Reference free?

ETS RF Quick Reference is free to download, with no in-app purchases.

### Is KBI CatApp free?

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

### Do ETS RF Quick Reference or KBI CatApp have ads?

Neither ETS RF Quick Reference nor KBI CatApp shows ads.

### Which is updated more often, ETS RF Quick Reference or KBI CatApp?

ETS RF Quick Reference ships an update every 7 months, and KBI CatApp every 7 months. Most recently, ETS RF Quick Reference was updated on September 9, 2026 and KBI CatApp on June 1, 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.*