# ChessPrep vs ChessMem

The clearest difference is review sentiment: ChessMem at 100% against ChessPrep's 33%. ChessPrep's advantage is iOS requirement (12.0 vs 15.0). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. ChessPrep sells 3 in-app purchases, starting at $0.99 per month and ChessMem sells 3 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

ChessPrep ships an update every 3 days, ChessMem every 5 days. The most recent releases landed on October 16, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | ChessPrep | ChessMem |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (2 ratings)](https://appshunter.io/ios/app/chessprep/id6469808213/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 33.3% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 5 days |
| Monetization | Free with in-app purchases | Freemium |
| Size | 109 MB | 26 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Stephen Papadatos](https://appshunter.io/developer/1712680449) | [AVDCLtd](https://appshunter.io/developer/1888710505) |

## What reviewers say

### ChessPrep

[App page](https://appshunter.io/ios/app/chessprep/id6469808213)

Enhance your chess strategy with a powerful companion app. Build your repertoire from grandmaster moves, analyze opponent responses, and master tactics using a strong chess engine and spaced repetition.

**Highlights:** Build repertoire from grandmaster moves, Analyze opponent responses by elo, Stockfish 16 chess engine, Spaced repetition system, Position analysis and variation calculation

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ChessButler Monthly Sub | $0.99 | per month |
| ChessButler Yearly Sub | $9.99 | per year |
| ChessButler Lifetime Premium | $19.99 | one-time |


### ChessMem

[App page](https://appshunter.io/ios/app/chessmem-chess-openings/id6762509466)

Master chess openings through spaced repetition and interactive practice. Learn curated lines, add your own, and discover tactical traps. Track progress and earn badges for your achievements.

**Highlights:** Spaced repetition for memorization, Interactive move practice, Add custom opening lines, Learn tactical opening traps, Curated opening collections, AI-powered move explanations, Progress tracking and badges

**Features:** Family Sharing

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Monthly | $3.99 | per month |
| Premium Annual | $29.99 | per year |
| Lifetime Premium | $49.99 | one-time |


## Frequently asked questions

### Is ChessPrep free?

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

### Is ChessMem free?

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

### Do ChessPrep or ChessMem have ads?

Neither ChessPrep nor ChessMem shows ads.

### Which is updated more often, ChessPrep or ChessMem?

ChessPrep ships an update every 3 days, and ChessMem every 5 days. Most recently, ChessPrep was updated on October 16, 2026 and ChessMem on October 18, 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.*