# Chess Shield vs ZugZwang

The clearest difference is iOS requirement: Chess Shield at 15.1 against ZugZwang's 17.0. On price, review sentiment, update cadence and ads there is nothing between them.

Both are free to download. Chess Shield sells 2 in-app purchases, starting at $4.99 per month and ZugZwang sells 4 in-app purchases, starting at $7.99 per month. Whichever you choose, the download price is not the number that matters.

Chess Shield ships an update every 9 days, ZugZwang weekly. Both last shipped on October 24, 2026.

## The numbers

| Metric | Chess Shield | ZugZwang |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.5 (4 ratings)](https://appshunter.io/ios/app/chess-shield/id6772290132/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 33.3% of reviews | **40.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 9 days | **Weekly** |
| Monetization | Freemium | Freemium |
| Size | 54 MB | 39 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Alejandro Trevino Saldana](https://appshunter.io/developer/6772290134) | [DaDaMa Ug (haftungsbeschränkt)](https://appshunter.io/developer/1852993941) |

## What reviewers say

### Chess Shield

[App page](https://appshunter.io/ios/app/chess-shield/id6772290132)

This app helps chess players improve by blocking distracting apps and replacing them with chess puzzles. Solve puzzles to advance your ELO and identify tactical weaknesses. It offers a free tier with basic features and a Pro version for advanced tactics and unlimited app blocking.

**Highlights:** Blocks distracting apps, Replaces app opens with chess puzzles, Puzzles matched to ELO, Tracks ELO in real-time, Tactical insights, Unlimited puzzles (Free), Block multiple apps (Pro)

**Features:** Family Sharing

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Chess Shield Pro | $4.99 | per month |
| Chess Shield Pro | $39.99 | per year |


### ZugZwang

[App page](https://appshunter.io/ios/app/zugzwang-chess-screen-time/id6808323304)

This app blocks distracting applications and websites, requiring users to solve a chess puzzle to gain temporary access. It offers a personalized rating system and strict mode for enhanced focus. Your progress is saved to your account and syncs across devices.

**Highlights:** Block apps, categories, and websites, Solve chess puzzles for access, Personalized Elo puzzle rating, Strict mode for enhanced focus, Cross-device progress syncing, No ads

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $7.99 | per month |
| Yearly | $14.99 | per year |
| Yearly | $19.99 | per year |
| Yearly | $29.99 | per year |


## Frequently asked questions

### Is Chess Shield free?

Chess Shield is free to download, with in-app purchases available.

### Is ZugZwang free?

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

### Do Chess Shield or ZugZwang have ads?

Neither Chess Shield nor ZugZwang shows ads.

### Which is updated more often, Chess Shield or ZugZwang?

Chess Shield ships an update every 9 days, and ZugZwang weekly. Most recently, Chess Shield was updated on October 24, 2026 and ZugZwang on October 24, 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.*