# Sudoku Haven vs Lattern

The clearest difference is update cadence: Lattern at every 3 days against Sudoku Haven's every 10 days. Sudoku Haven's advantage is device support (6 vs 3). On price, ads, in-app purchases and iOS requirement there is nothing between them.

Both are free to download. Sudoku Haven sells 1 one-off in-app purchase and Lattern sells 4 in-app purchases, starting at $2.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Sudoku Haven ships an update every 10 days, Lattern every 3 days. The most recent releases landed on October 31, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Sudoku Haven | Lattern |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/sudoku-haven/id6775695069/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 10 days | **Every 3 days** |
| Monetization | Free with in-app purchases | — |
| Size | 193 MB | 24 MB |
| Requires iOS | **16.4** | 17.0 |
| Devices | **iPhone, iPad, Mac, Apple TV, Apple Watch, Vision Pro** | iPhone, iPad, Apple Watch |
| Age rating | 12+ | 12+ |
| Developer | [Emu WTF](https://appshunter.io/developer/1885110363) | [J AND B CREATIONS LLC](https://appshunter.io/developer/1895160810) |

## What reviewers say

### Sudoku Haven

[App page](https://appshunter.io/ios/app/sudoku-haven/id6775695069)

Enjoy a peaceful Sudoku experience with over 450,000 hand-graded puzzles, daily challenges, and 20 calming themes. Play offline with smart hints, built-in trainers, and progress tracking. Optional purchase removes ads and unlocks all features.

**Highlights:** 450,000+ hand-graded puzzles, Daily Challenge mode, 20 quiet themes, Offline play, Smart hints and trainers, Progress tracking and stats, Apple Watch and iMessage integration

**Features:** Family Sharing, Apple Watch app, iMessage stickers

**In-app purchases (1)**

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


### Lattern

[App page](https://appshunter.io/ios/app/lattern-memory-grid-puzzle/id6775867842)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lattern+ Weekly | $2.99 | per 7 days |
| Lattern+ Yearly | $19.99 | per year |
| Remove Ads | $2.99 | one-time |
| Lattern+ Lifetime | $19.99 | one-time |


## Frequently asked questions

### Is Sudoku Haven free?

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

### Is Lattern free?

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

### Do Sudoku Haven or Lattern have ads?

Both Sudoku Haven and Lattern show ads.

### Which is updated more often, Sudoku Haven or Lattern?

Sudoku Haven ships an update every 10 days, and Lattern every 3 days. Most recently, Sudoku Haven was updated on October 31, 2026 and Lattern on November 5, 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.*