# CatDo vs Resoomer REFLEX

The clearest difference is ads: CatDo at none against Resoomer REFLEX's shown. Resoomer REFLEX's advantage is update cadence (fortnightly vs every 10 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

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

CatDo ships an update every 10 months, Resoomer REFLEX fortnightly. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | CatDo | Resoomer REFLEX |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 10 months | **Fortnightly** |
| Size | 117 MB | 13 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Dinu Stefan Rusu](https://appshunter.io/developer/1697162965) | [Rony Epaminondas](https://appshunter.io/developer/6808828457) |

## What reviewers say

### CatDo

[App page](https://appshunter.io/ios/app/catdo-your-study-buddy/id6751812918)

**Features:** macOS Compatibility

**In-app purchases:** none


### Resoomer REFLEX

[App page](https://appshunter.io/ios/app/resoomer-reflex/id6808828455)

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

**In-app purchases:** none


## Frequently asked questions

### Is CatDo free?

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

### Is Resoomer REFLEX free?

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

### Do CatDo or Resoomer REFLEX have ads?

Resoomer REFLEX shows ads; CatDo does not.

### Which is updated more often, CatDo or Resoomer REFLEX?

CatDo ships an update every 10 months, and Resoomer REFLEX fortnightly. Most recently, CatDo was updated on October 30, 2026 and Resoomer REFLEX on October 31, 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.*