# SIM app vs World Schoolbooks Languages

The clearest difference is in-app purchases: SIM app at none against World Schoolbooks Languages's 2. SIM app also leads on update cadence (every 9 days vs monthly) and iOS requirement (10.3 vs 13.0.0). On price, ads and device support there is nothing between them.

Both are free to download. World Schoolbooks Languages sells 2 in-app purchases, starting at $4.99 per month. SIM app asks for nothing beyond the download.

SIM app ships an update every 9 days, World Schoolbooks Languages monthly. The most recent releases landed on October 1, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | SIM app | World Schoolbooks Languages |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.0 (1 ratings)](https://appshunter.io/ios/app/world-schoolbooks-languages/id6474200239/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 50.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 9 days** | Monthly |
| Monetization | — | Free with in-app purchases |
| Size | 30 MB | 53 MB |
| Requires iOS | **10.3** | 13.0.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [GOBIERNO AUTONOMO MUNICIPAL DE LA PAZ](https://appshunter.io/developer/1195162880) | [World Schoolbooks LLC](https://appshunter.io/developer/1721001561) |

## What reviewers say

### SIM app

[App page](https://appshunter.io/ios/app/sim-app/id1451998272)

**In-app purchases:** none


### World Schoolbooks Languages

[App page](https://appshunter.io/ios/app/world-schoolbooks-languages/id6474200239)

Explore over 100 global and regional languages with focused lessons and interactive games. Learn alphabets, vocabulary, and grammar through engaging practice. Offers daily free learning time.

**Highlights:** Learn 100+ global and regional languages, Short, focused lessons, Interactive language games, Alphabet learning with audio, Vocabulary and grammar practice, Daily free learning

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $4.99 | per month |
| Annual Subscription | $49.99 | per year |


## Frequently asked questions

### Is SIM app free?

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

### Is World Schoolbooks Languages free?

World Schoolbooks Languages is free to download, with in-app purchases available.

### Do SIM app or World Schoolbooks Languages have ads?

Neither SIM app nor World Schoolbooks Languages shows ads.

### Which is updated more often, SIM app or World Schoolbooks Languages?

SIM app ships an update every 9 days, and World Schoolbooks Languages monthly. Most recently, SIM app was updated on October 1, 2026 and World Schoolbooks Languages on September 28, 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.*