# D.space vs CorLet

The clearest difference is in-app purchases: D.space at none against CorLet's 10. D.space also leads on iOS requirement (12 vs 15.6). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. CorLet sells 10 one-off in-app purchases. D.space asks for nothing beyond the download.

D.space ships an update every 2 weeks, CorLet fortnightly. The most recent releases landed on November 4, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | D.space | CorLet |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/corlet-slow-pen-pals/id6745135884/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Fortnightly** |
| Monetization | — | Freemium |
| Size | 21 MB | 94 MB |
| Requires iOS | **12** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Chun Yin LI](https://appshunter.io/developer/1787854141) | [淑微 潘](https://appshunter.io/developer/1799222548) |

## What reviewers say

### D.space

[App page](https://appshunter.io/ios/app/dspace/id6739996700)

**Features:** macOS Compatibility

**In-app purchases:** none


### CorLet

[App page](https://appshunter.io/ios/app/corlet-slow-pen-pals/id6745135884)

This app offers a peaceful escape from instant messaging by providing a platform for traditional letter writing and journaling. It emphasizes thoughtful communication, allowing users to send letters that take time to arrive and express themselves through a digital diary.

**Highlights:** Asynchronous slow mail, Digital diary with inspiration prompts, Customizable stationery and postmarks, Collectible digital stamps, Find sincere penpals, Minimalist and ad-free interface

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 小试牛刀 | $0.99 | one-time |
| 新手礼包 | $0.99 | one-time |
| 轻松充值 | $1.99 | one-time |
| 标准套餐 | $2.99 | one-time |
| 超值套餐 | $3.99 | one-time |
| 豪华套餐 | $4.99 | one-time |
| 至尊套餐 | $12.99 | one-time |
| 尊享套餐 | $29.99 | one-time |
| 王者套餐 | $29.99 | one-time |
| 传奇套餐 | $129.99 | one-time |


## Frequently asked questions

### Is D.space free?

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

### Is CorLet free?

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

### Do D.space or CorLet have ads?

Neither D.space nor CorLet shows ads.

### Which is updated more often, D.space or CorLet?

D.space ships an update every 2 weeks, and CorLet fortnightly. Most recently, D.space was updated on November 4, 2026 and CorLet on October 30, 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.*