# Visual Memory vs Stack

The clearest difference is in-app purchases: Stack at none against Visual Memory's 1. Stack also leads on ads (none vs shown) and update cadence (weekly vs every 56 months). Visual Memory's advantage is iOS requirement (15.0 vs 18.0). On price and device support there is nothing between them.

Both are free to download. Visual Memory sells 1 one-off in-app purchase. Stack asks for nothing beyond the download.

Visual Memory ships an update every 56 months, Stack weekly. The most recent releases landed on November 6, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Visual Memory | Stack |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 56 months | **Weekly** |
| Size | 99 MB | 14 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Ali Varli](https://appshunter.io/developer/410552526) | [Hemal Modi](https://appshunter.io/developer/1522352514) |

## What reviewers say

### Visual Memory

[App page](https://appshunter.io/ios/app/visual-memory-brain-training/id471258426)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $2.99 | one-time |


### Stack

[App page](https://appshunter.io/ios/app/stack-block-puzzle-for-watch/id6746418627)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Visual Memory free?

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

### Is Stack free?

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

### Do Visual Memory or Stack have ads?

Visual Memory shows ads; Stack does not.

### Which is updated more often, Visual Memory or Stack?

Visual Memory ships an update every 56 months, and Stack weekly. Most recently, Visual Memory was updated on November 6, 2026 and Stack on October 30, 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.*