# Mimir vs BookSprite

The clearest difference is update cadence: BookSprite at every 4 days against Mimir's every 10 days. BookSprite also leads on iOS requirement (15.0 vs 18.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Mimir sells 2 in-app purchases, starting at $12.99 per month and BookSprite sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

Mimir ships an update every 10 days, BookSprite every 4 days. Both last shipped on November 13, 2026.

## The numbers

| Metric | Mimir | BookSprite |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (162 ratings)](https://appshunter.io/ios/app/mimir-general-knowledge-quiz/id6511234817/reviews)** | — |
| Number of ratings | **162** | — |
| Positive reviews | 53.6% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 10 days | **Every 4 days** |
| Monetization | Free with in-app purchases | — |
| Size | 67 MB | 47 MB |
| Requires iOS | 18.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [RandomWalk](https://appshunter.io/developer/1755557478) | [BookSprite LLC](https://appshunter.io/developer/6794867162) |

## What reviewers say

### Mimir

[App page](https://appshunter.io/ios/app/mimir-general-knowledge-quiz/id6511234817)

This app makes learning an adventure with an AI-powered tutor that adapts to your learning style. It uses vibrant visuals and interactive conversations to make complex topics engaging and easy to understand, covering a wide range of subjects.

**Highlights:** AI-powered adaptive tutor, Interactive visual learning, Engaging conversational learning, Wide range of topics, Personalized learning experience

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Mimir Pro - Monthly | $12.99 | per month |
| Mimir Pro - Yearly | $89.99 | per year |


### BookSprite

[App page](https://appshunter.io/ios/app/booksprite/id6794867160)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Starter | $4.99 | per month |
| Family | $9.99 | per month |


## Frequently asked questions

### Is Mimir free?

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

### Is BookSprite free?

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

### Do Mimir or BookSprite have ads?

Neither Mimir nor BookSprite shows ads.

### Which is updated more often, Mimir or BookSprite?

Mimir ships an update every 10 days, and BookSprite every 4 days. Most recently, Mimir was updated on November 13, 2026 and BookSprite on November 13, 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.*