# Catalytic Collector vs DF Auto

The clearest difference is ads: Catalytic Collector at none against DF Auto's shown. Catalytic Collector also leads on update cadence (weekly vs every 2 months) and iOS requirement (10.1 vs 15.1). On price, 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.

Catalytic Collector ships an update weekly, DF Auto every 2 months. The most recent releases landed on October 7, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Catalytic Collector | DF Auto |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (2 ratings)](https://appshunter.io/ios/app/catalytic-collector/id1551812753/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Weekly** | Every 2 months |
| Monetization | Free | — |
| Size | 59 MB | 38 MB |
| Requires iOS | **10.1** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Jacksi LTD](https://appshunter.io/developer/1648266725) | [Md Minhazur Rahman](https://appshunter.io/developer/1863959342) |

## What reviewers say

### Catalytic Collector

[App page](https://appshunter.io/ios/app/catalytic-collector/id1551812753)

Access a comprehensive database of over 16,000 catalytic converter types. This app aims to bring transparency to the used catalyst market, simplifying sales and connecting users with a global network of agents for efficient service.

**Highlights:** Extensive database of 16,000+ catalytic converters, Transparency in used catalyst market, Simplified selling of used catalytic converters, Global network of agents, Cost-effective and appropriate services

**Features:** macOS Compatibility

**In-app purchases:** none


### DF Auto

[App page](https://appshunter.io/ios/app/df-auto/id6756973542)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Catalytic Collector free?

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

### Is DF Auto free?

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

### Do Catalytic Collector or DF Auto have ads?

DF Auto shows ads; Catalytic Collector does not.

### Which is updated more often, Catalytic Collector or DF Auto?

Catalytic Collector ships an update weekly, and DF Auto every 2 months. Most recently, Catalytic Collector was updated on October 7, 2026 and DF Auto on October 30, 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.*