# when vs Krumbit

The clearest difference is update cadence: Krumbit at weekly against when's every 3 weeks. when's advantage is iOS requirement (13.0 vs 15.1). 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.

when ships an update every 3 weeks, Krumbit weekly. The most recent releases landed on October 1, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | when | Krumbit |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.5 (15 ratings)](https://appshunter.io/ios/app/krumbit-learn-while-scrolling/id6747910126/reviews)** |
| Number of ratings | — | **15** |
| Positive reviews | — | 93.8% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Weekly** |
| Monetization | — | Free |
| Size | 30 MB | 56 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Hiroe Oshimura](https://appshunter.io/developer/1592216886) | [Boqiang Liang](https://appshunter.io/developer/1762321893) |

## What reviewers say

### when

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

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

**In-app purchases:** none


### Krumbit

[App page](https://appshunter.io/ios/app/krumbit-learn-while-scrolling/id6747910126)

This app transforms your scrolling time into learning opportunities. Watch short video lessons on various topics and test your knowledge with quick quizzes. Build a daily habit of continuous learning in just minutes a day.

**Highlights:** Bite-sized video lessons, Quick quizzes, Daily streak tracking, Progress monitoring, Explore diverse topics, In-app feedback

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

**In-app purchases:** none


## Frequently asked questions

### Is when free?

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

### Is Krumbit free?

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

### Do when or Krumbit have ads?

Neither when nor Krumbit shows ads.

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

when ships an update every 3 weeks, and Krumbit weekly. Most recently, when was updated on October 1, 2026 and Krumbit on October 2, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*