# Stackle Topics vs Sort Block

The clearest difference is in-app purchases: Stackle Topics at none against Sort Block's 7. Sort Block's advantage is update cadence (every 5 days vs every 5 weeks) and iOS requirement (13.0 vs 17.6). On price, ads and device support there is nothing between them.

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

Stackle Topics ships an update every 5 weeks, Sort Block every 5 days. The most recent releases landed on October 16, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Stackle Topics | Sort Block |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 5 weeks | **Every 5 days** |
| Size | 77 MB | 217 MB |
| Requires iOS | 17.6 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 12+ | 12+ |
| Developer | [Mezze](https://appshunter.io/developer/1882445692) | [RIO MASTER DMCC](https://appshunter.io/developer/1736738912) |

## What reviewers say

### Stackle Topics

[App page](https://appshunter.io/ios/app/stackle-topics/id6790752245)

**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 Stackle Topics free?

Stackle Topics 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 Stackle Topics or Sort Block have ads?

Both Stackle Topics and Sort Block show ads.

### Which is updated more often, Stackle Topics or Sort Block?

Stackle Topics ships an update every 5 weeks, and Sort Block every 5 days. Most recently, Stackle Topics was updated on October 16, 2026 and Sort Block on October 8, 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.*