# Edustream Library vs Subtraction for Kids

The clearest difference is in-app purchases: Edustream Library at none against Subtraction for Kids's 1. Edustream Library also leads on iOS requirement (13.0 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. Subtraction for Kids sells 1 one-off in-app purchase. Edustream Library asks for nothing beyond the download.

## The numbers

| Metric | Edustream Library | Subtraction for Kids |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | — |
| Size | 35 MB | 1 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Natalya Mukhamedjanova](https://appshunter.io/developer/1811582062) | [MD Shahariar Nazim Joy](https://appshunter.io/developer/1893961943) |

## What reviewers say

### Edustream Library

[App page](https://appshunter.io/ios/app/edustream-library/id6752237375)

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

**In-app purchases:** none


### Subtraction for Kids

[App page](https://appshunter.io/ios/app/subtraction-for-kids-math/id6792043674)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Everything | $4.99 | one-time |


## Frequently asked questions

### Is Edustream Library free?

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

### Is Subtraction for Kids free?

Subtraction for Kids is free to download, with in-app purchases available.

### Do Edustream Library or Subtraction for Kids have ads?

Neither Edustream Library nor Subtraction for Kids shows ads.

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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.*