# Deep Sky Diary vs えもーぐ

The clearest difference is ads: Deep Sky Diary at none against えもーぐ's shown. Deep Sky Diary also leads on update cadence (every 3 days vs every 3 weeks) and iOS requirement (14.1 vs 16.0). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Deep Sky Diary ships an update every 3 days, えもーぐ every 3 weeks. The most recent releases landed on October 11, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Deep Sky Diary | えもーぐ |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/deep-sky-diary/id1510396752/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Every 3 days** | Every 3 weeks |
| Monetization | Free | — |
| Size | 8 MB | 6 MB |
| Requires iOS | **14.1** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Shunzhe Ma](https://appshunter.io/developer/1052286218) | [Eiichi Akutsu](https://appshunter.io/developer/1717376224) |

## What reviewers say

### Deep Sky Diary

[App page](https://appshunter.io/ios/app/deep-sky-diary/id1510396752)

Record your thoughts and memories for your future self or send messages into the void. This app allows you to create regular diary entries, schedule future readings, or send messages that are permanently deleted.

**Highlights:** Regular diary entries, Scheduled future readings, Ephemeral black hole messages, Optional black hole receipt

**Features:** macOS Compatibility

**In-app purchases:** none


### えもーぐ

[App page](https://appshunter.io/ios/app/id6474685396)

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

**In-app purchases:** none


## Frequently asked questions

### Is Deep Sky Diary free?

Deep Sky Diary is free to download, with no in-app purchases.

### Is えもーぐ free?

えもーぐ is free to download, with no in-app purchases.

### Do Deep Sky Diary or えもーぐ have ads?

えもーぐ shows ads; Deep Sky Diary does not.

### Which is updated more often, Deep Sky Diary or えもーぐ?

Deep Sky Diary ships an update every 3 days, and えもーぐ every 3 weeks. Most recently, Deep Sky Diary was updated on October 11, 2026 and えもーぐ on October 10, 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.*