# ChoiceCat vs 知几Kairos

The clearest difference is ads: 知几Kairos at none against ChoiceCat's shown. ChoiceCat's advantage is iOS requirement (15.2 vs 17.0). On price, update cadence, 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.

ChoiceCat ships an update every 10 days, 知几Kairos fortnightly. The most recent releases landed on October 25, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | ChoiceCat | 知几Kairos |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 10 days** | Fortnightly |
| Size | 4 MB | 11 MB |
| Requires iOS | **15.2** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [瑞媚 杨](https://appshunter.io/developer/1731046721) | [algormula Pte. Ltd.](https://appshunter.io/developer/1828508832) |

## What reviewers say

### ChoiceCat

[App page](https://appshunter.io/ios/app/choicecat-decision-helper/id6744382477)

**Features:** macOS Compatibility

**In-app purchases:** none


### 知几Kairos

[App page](https://appshunter.io/ios/app/kairos/id6758753321)

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

**In-app purchases:** none


## Frequently asked questions

### Is ChoiceCat free?

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

### Is 知几Kairos free?

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

### Do ChoiceCat or 知几Kairos have ads?

ChoiceCat shows ads; 知几Kairos does not.

### Which is updated more often, ChoiceCat or 知几Kairos?

ChoiceCat ships an update every 10 days, and 知几Kairos fortnightly. Most recently, ChoiceCat was updated on October 25, 2026 and 知几Kairos on October 9, 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.*