# NotSendMail vs Nook Letter

The clearest difference is in-app purchases: NotSendMail at none against Nook Letter's 2. Nook Letter's advantage is ads (none vs shown) and update cadence (every 2 weeks vs every 16 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Nook Letter sells 2 in-app purchases, starting at $1.99 per month. NotSendMail asks for nothing beyond the download.

NotSendMail ships an update every 16 months, Nook Letter every 2 weeks. The most recent releases landed on October 13, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | NotSendMail | Nook Letter |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (4 ratings)](https://appshunter.io/ios/app/notsendmail/id400920857/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 86.8% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 16 months | **Every 2 weeks** |
| Monetization | Ad-supported | — |
| Size | 14 MB | 88 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Detective Girls](https://appshunter.io/developer/400920860) | [YUYA MIYAZAKI](https://appshunter.io/developer/1878926763) |

## What reviewers say

### NotSendMail

[App page](https://appshunter.io/ios/app/notsendmail/id400920857)

Express negative emotions by composing them as emails and then symbolically disposing of them. This app allows you to release feelings of stress, sadness, or anger without actually sending or saving any messages, promoting a sense of relief.

**Highlights:** Compose emails for negative feelings, Symbolically discard emails, Reduce stress and improve mood, No message sending or saving, Simple and intuitive interface

**Features:** macOS Compatibility

**In-app purchases:** none


### Nook Letter

[App page](https://appshunter.io/ios/app/nook-letter/id6762508911)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Nook　プレミアムプラン | $1.99 | per month |
| 秘密の切手 | $0.49 | one-time |


## Frequently asked questions

### Is NotSendMail free?

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

### Is Nook Letter free?

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

### Do NotSendMail or Nook Letter have ads?

NotSendMail shows ads; Nook Letter does not.

### Which is updated more often, NotSendMail or Nook Letter?

NotSendMail ships an update every 16 months, and Nook Letter every 2 weeks. Most recently, NotSendMail was updated on October 13, 2026 and Nook Letter on October 7, 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.*