# Deep Sky Diary — Write to future self

> Digital diary for future self-communication and ephemeral messaging. (iPhone/iPad app by Shunzhe Ma.)

- Source: https://appshunter.io/ios/app/deep-sky-diary/id1510396752 (this page in markdown: same URL + `.md`)
- Developer: [Shunzhe Ma](https://appshunter.io/developer/1052286218)
- Category: Health & Fitness, Utilities
- Price: Free
- Rating: 5.00/5 from 2 App Store ratings
- Age rating: 4+
- Requires: iOS 14.1 · 8 MB
- Languages: English, Japanese
- Released: 2020-05-08
- Data updated: 2026-06-04
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/deep-sky-diary/id1510396752/reviews.md

## What is Deep Sky Diary?

Sometimes, you probably want to talk to your "future self", and sometimes, you probably want to just talk to nowhere. Deep Sky Diary is here for you.

- Keep regular diaries
- Write diaries for future you: set a date and read the diary after that day.
- Write a diary and send it to the black hole (nowhere) *

*: The message will be discarded and not saved on your local device. If you choose to save a receipt, a story with the title "Blackhole Receipt" will be saved.

## Key features

- Regular diary entries
- Scheduled future readings
- Ephemeral black hole messages
- Optional black hole receipt


## Frequently asked questions about Deep Sky Diary

### Does Deep Sky Diary have ads?

No, Deep Sky Diary is ad-free. You can use all its features without any interruptions from advertisements.

### How accurate is Deep Sky Diary's future message delivery?

Deep Sky Diary allows you to set a specific date for future readings. The app is designed to reliably store and present these entries on the designated date.

### What devices support Deep Sky Diary?

Deep Sky Diary is available on iPhone, iPad, and iPod devices. It is designed for the iOS ecosystem.

### How often is Deep Sky Diary updated?

The latest version of Deep Sky Diary is 2.0, last updated on June 18, 2021. Updates typically focus on improving functionality and user experience.

### What is the age rating for Deep Sky Diary?

Deep Sky Diary has an age rating of 4+. This indicates it is suitable for a wide range of users, including children.

### Can I recover messages sent to the black hole in Deep Sky Diary?

Messages sent to the black hole are permanently discarded and not saved locally. You can choose to save a 'Blackhole Receipt' which is a story titled 'Blackhole Receipt'.

### What do users like about Deep Sky Diary?

Users appreciate the unique concept of writing to their future selves and the option to send messages into the void. The app's simplicity and focus on these core features are highly valued.

### Is Deep Sky Diary free to use?

Yes, Deep Sky Diary is completely free to download and use. There are no costs associated with its features or functionality.

## Version history (last 5 releases)

### 2.0 — 2021-06-18

- The app is redesigned with SwiftUI, with a beautiful and simplified interface.
- You can view your diaries in a calendar view
- Easily add encryption to a diary by clicking the lock icon in the diary composer

### 1.6.1 — 2020-09-30

Fixed some UI and localization issues.

### 1.6 — 2020-09-28

(New) You can now choose to enable encryption for your diary with a passcode.

### 1.5.1 — 2020-05-20

Fixed an issue about theme display.

### 1.5 — 2020-05-16

- New: Now you can add a background image to the diary cards
- Sort diary by year and month

## More apps by Shunzhe Ma

- [Stream RSS](https://appshunter.io/ios/app/stream-rss/id1187697915)
- [Ghostly Stickers](https://appshunter.io/ios/app/ghostly-stickers/id1198506772)
- [Snowy Winter Stickers](https://appshunter.io/ios/app/snowy-winter-stickers/id1315311828)
- [EventFlows](https://appshunter.io/ios/app/eventflows/id1338108553)
- [GlucoSecrets](https://appshunter.io/ios/app/glucosecrets/id1339496270)
- [WhereNext: Map Pinning Tool](https://appshunter.io/ios/app/wherenext-map-pinning-tool/id1449414895)

All apps by Shunzhe Ma: https://appshunter.io/developer/1052286218

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-04.*