# COINBOOK vs 펜팔, 편지 친구

The clearest difference is in-app purchases: COINBOOK at none against 펜팔, 편지 친구's 2. 펜팔, 편지 친구's advantage is device support. On price and iOS requirement there is nothing between them.

Both are free to download. 펜팔, 편지 친구 sells 2 one-off in-app purchases. COINBOOK asks for nothing beyond the download.

## The numbers

| Metric | COINBOOK | 펜팔, 편지 친구 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 66.7% of reviews |
| In-app purchases | **No** | Yes |
| Ads | — | No |
| Update frequency | — | Fortnightly |
| Monetization | — | Free with in-app purchases |
| Size | 37 MB | 7 MB |
| Requires iOS | **14.0** | 15.0 |
| Devices | — | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Hwajoong Song](https://appshunter.io/developer/1762431667) | [JINWOOK CHUNG](https://appshunter.io/developer/1896751459) |

## What reviewers say

### COINBOOK

[App page](https://appshunter.io/ios/app/coinbook/id6642656122)

**In-app purchases:** none


### 펜팔, 편지 친구

[App page](https://appshunter.io/ios/app/id6770534229)

This app fosters deeper connections through slow communication, focusing on written messages and a 6-hour delivery time for letters. It encourages sharing daily thoughts and finding like-minded individuals in a safe, respectful environment.

**Highlights:** Daily journaling with 'Today's Writing', 6-hour delayed letter delivery, Slow, thoughtful communication, Safe and curated interactions, Connect through shared thoughts and feelings

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 우표 2장 | $0.49 | one-time |
| 우표 10장 | $1.99 | one-time |


## Frequently asked questions

### Is COINBOOK free?

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

### Is 펜팔, 편지 친구 free?

펜팔, 편지 친구 is free to download, with in-app purchases available.

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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.*