# knowLedge vs when

The clearest difference is update cadence: when at every 3 weeks against knowLedge's every 85 months. when also leads on iOS requirement (13.0 vs 15.0). 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.

knowLedge ships an update every 85 months, when every 3 weeks. The most recent releases landed on September 30, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | knowLedge | when |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 85 months | **Every 3 weeks** |
| Size | 28 MB | 30 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Mallow Technologies Private Limited](https://appshunter.io/developer/416807590) | [Hiroe Oshimura](https://appshunter.io/developer/1592216886) |

## What reviewers say

### knowLedge

[App page](https://appshunter.io/ios/app/knowledge-learn-through-quiz/id1179700747)

**Features:** Vision Pro support

**In-app purchases:** none


### when

[App page](https://appshunter.io/ios/app/when-where-what-database/id6502634868)

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

**In-app purchases:** none


## Frequently asked questions

### Is knowLedge free?

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

### Is when free?

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

### Do knowLedge or when have ads?

Neither knowLedge nor when shows ads.

### Which is updated more often, knowLedge or when?

knowLedge ships an update every 85 months, and when every 3 weeks. Most recently, knowLedge was updated on September 30, 2026 and when on October 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.*