# Cross Sum vs Memorize Binary

The clearest difference is in-app purchases: Memorize Binary at none against Cross Sum's 1. Memorize Binary also leads on ads (none vs shown) and iOS requirement (14.0 vs 17.0). Cross Sum's advantage is update cadence (every 4 months vs every 32 months). On price and device support there is nothing between them.

Both are free to download. Cross Sum sells 1 one-off in-app purchase. Memorize Binary asks for nothing beyond the download.

Cross Sum ships an update every 4 months, Memorize Binary every 32 months. The most recent releases landed on November 7, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Cross Sum | Memorize Binary |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 4 months** | Every 32 months |
| Monetization | — | Free |
| Size | 11 MB | 2 MB |
| Requires iOS | 17.0 | **14.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [宏斌 樊](https://appshunter.io/developer/1452129040) | [Ola Kaare Risa](https://appshunter.io/developer/1562401648) |

## What reviewers say

### Cross Sum

[App page](https://appshunter.io/ios/app/cross-sum-number-puzzle/id1514735753)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 去除广告插件 | $3.99 | one-time |


### Memorize Binary

[App page](https://appshunter.io/ios/app/memorize-binary/id1562401646)

This app helps users memorize binary numbers by allowing customization of memorization time, digit count, and grouping. It tracks your best results, providing a tool for focused learning and memory improvement.

**Highlights:** Customizable memorization time, Adjustable digit count, Configurable digit grouping, Save best results, Binary number practice

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

**In-app purchases:** none


## Frequently asked questions

### Is Cross Sum free?

Cross Sum is free to download, with in-app purchases available.

### Is Memorize Binary free?

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

### Do Cross Sum or Memorize Binary have ads?

Cross Sum shows ads; Memorize Binary does not.

### Which is updated more often, Cross Sum or Memorize Binary?

Cross Sum ships an update every 4 months, and Memorize Binary every 32 months. Most recently, Cross Sum was updated on November 7, 2026 and Memorize Binary on November 3, 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.*