# Deep Sky Diary vs シンプルな歩数計

The clearest difference is in-app purchases: Deep Sky Diary at none against シンプルな歩数計's 1. Deep Sky Diary also leads on update cadence (every 3 days vs every 3 months) and iOS requirement (14.1 vs 16.0). On price, ads and device support there is nothing between them.

Both are free to download. シンプルな歩数計 sells 1 one-off in-app purchase. Deep Sky Diary asks for nothing beyond the download.

Deep Sky Diary ships an update every 3 days, シンプルな歩数計 every 3 months. The most recent releases landed on November 3, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Deep Sky Diary | シンプルな歩数計 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/deep-sky-diary/id1510396752/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 3 months |
| Monetization | Free | — |
| Size | 8 MB | 2 MB |
| Requires iOS | **14.1** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Shunzhe Ma](https://appshunter.io/developer/1052286218) | [Comlinks Co. Ltd.](https://appshunter.io/developer/1668250557) |

## 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, Vision Pro support

**In-app purchases:** none


### シンプルな歩数計

[App page](https://appshunter.io/ios/app/id1671732889)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Buy coffee to developers | $0.99 | one-time |


## Frequently asked questions

### Is Deep Sky Diary free?

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

### Is シンプルな歩数計 free?

シンプルな歩数計 is free to download, with in-app purchases available.

### Do Deep Sky Diary or シンプルな歩数計 have ads?

Neither Deep Sky Diary nor シンプルな歩数計 shows ads.

### Which is updated more often, Deep Sky Diary or シンプルな歩数計?

Deep Sky Diary ships an update every 3 days, and シンプルな歩数計 every 3 months. Most recently, Deep Sky Diary was updated on November 3, 2026 and シンプルな歩数計 on October 25, 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.*