# X vs Quiet Letters

The clearest difference is in-app purchases: Quiet Letters at none against X's 1. Quiet Letters also leads on ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. X sells 1 one-off in-app purchase. Quiet Letters asks for nothing beyond the download.

X ships an update fortnightly, Quiet Letters every 3 weeks. The most recent releases landed on October 19, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | X | Quiet Letters |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Fortnightly** | Every 3 weeks |
| Size | 16 MB | 44 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Dmitrii Semenov](https://appshunter.io/developer/1887097110) | [Laurent Chouinard](https://appshunter.io/developer/1896321782) |

## What reviewers say

### X

[App page](https://appshunter.io/ios/app/x-sudokucom/id6762609666)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| X-sudoku.com | $3.99 | one-time |


### Quiet Letters

[App page](https://appshunter.io/ios/app/quiet-letters/id6766751256)

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

**In-app purchases:** none


## Frequently asked questions

### Is X free?

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

### Is Quiet Letters free?

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

### Do X or Quiet Letters have ads?

X shows ads; Quiet Letters does not.

### Which is updated more often, X or Quiet Letters?

X ships an update fortnightly, and Quiet Letters every 3 weeks. Most recently, X was updated on October 19, 2026 and Quiet Letters on October 12, 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.*