# PSA™ vs Krumbit

The clearest difference is in-app purchases: Krumbit at none against PSA™'s 1. Krumbit also leads on update cadence (weekly vs every 6 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. PSA™ sells 1 one-off in-app purchase. Krumbit asks for nothing beyond the download.

PSA™ ships an update every 6 weeks, Krumbit weekly. The most recent releases landed on September 30, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | PSA™ | 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 | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Weekly** |
| Monetization | — | Free |
| Size | 104 MB | 56 MB |
| Requires iOS | 15.2 | **15.1** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Corbeautech](https://appshunter.io/developer/1661958043) | [Boqiang Liang](https://appshunter.io/developer/1762321893) |

## What reviewers say

### PSA™

[App page](https://appshunter.io/ios/app/psa/id6740616257)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Relationship Management | Free | one-time |


### 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 PSA™ free?

PSA™ is free to download, with in-app purchases available.

### Is Krumbit free?

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

### Do PSA™ or Krumbit have ads?

Neither PSA™ nor Krumbit shows ads.

### Which is updated more often, PSA™ or Krumbit?

PSA™ ships an update every 6 weeks, and Krumbit weekly. Most recently, PSA™ was updated on September 30, 2026 and Krumbit on October 6, 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.*