# Letter Stream vs Sort Block

The clearest difference is in-app purchases: Letter Stream at none against Sort Block's 7. Letter Stream also leads on ads (none vs shown). Sort Block's advantage is device support (3 vs 1) and iOS requirement (13.0 vs 16.0). On price there is nothing between them.

Both are free to download. Sort Block sells 7 one-off in-app purchases. Letter Stream asks for nothing beyond the download.

## The numbers

| Metric | Letter Stream | Sort Block |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | — | Every 5 days |
| Size | 6 MB | 217 MB |
| Requires iOS | 16.0 | **13.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [Andy Otto](https://appshunter.io/developer/1870819227) | [RIO MASTER DMCC](https://appshunter.io/developer/1736738912) |

## What reviewers say

### Letter Stream

[App page](https://appshunter.io/ios/app/letter-stream/id6763931813)

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

**In-app purchases:** none


### Sort Block

[App page](https://appshunter.io/ios/app/sort-block-association-puzzle/id6795919157)

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

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 500 Gold | $1.99 | one-time |
| 1000 Gold | $3.99 | one-time |
| No Ads | $8.99 | one-time |
| 5000 Gold | $9.99 | one-time |
| 10000 Gold | $34.99 | one-time |
| 25000 Gold | $59.99 | one-time |
| 50000 Gold | $89.99 | one-time |


## Frequently asked questions

### Is Letter Stream free?

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

### Is Sort Block free?

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

### Do Letter Stream or Sort Block have ads?

Sort Block shows ads; Letter Stream does not.

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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.*