# Deep Sky Diary vs Satoshi Sidekick

The clearest difference is in-app purchases: Deep Sky Diary at none against Satoshi Sidekick's 1. Deep Sky Diary also leads on ads (none vs shown) and update cadence (every 3 days vs every 2 weeks). On price, rating, review sentiment and ratings volume there is nothing between them.

Both are free to download. Satoshi Sidekick sells 1 one-off in-app purchase. Deep Sky Diary asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for Deep Sky Diary against 5.0 for Satoshi Sidekick. Both are backed by a comparable volume of ratings — 2 and 5 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

Deep Sky Diary ships an update every 3 days, Satoshi Sidekick every 2 weeks. Both last shipped on November 3, 2026.

## The numbers

| Metric | Deep Sky Diary | Satoshi Sidekick |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (2 ratings)](https://appshunter.io/ios/app/deep-sky-diary/id1510396752/reviews) | [5.0 (5 ratings)](https://appshunter.io/ios/app/satoshi-sidekick/id1643388378/reviews) |
| Number of ratings | 2 | **5** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 3 days** | Every 2 weeks |
| Monetization | **Free** | Free with in-app purchases |
| Size | 8 MB | 19 MB |
| Requires iOS | 14.1 | **14.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Shunzhe Ma](https://appshunter.io/developer/1052286218) | [Robert Godfrey](https://appshunter.io/developer/1643388380) |

## 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


### Satoshi Sidekick

[App page](https://appshunter.io/ios/app/satoshi-sidekick/id1643388378)

This unofficial companion app helps STEPN users optimize their NFT shoes for earning potential. It calculates estimated earnings, durability loss, and mystery box chances, while also providing speed alerts and energy timers with optional voice updates.

**Highlights:** NFT shoe optimizer, Estimate earnings and costs, Speed range alerts, Energy timer with voice updates, Real-time price data integration, Mystery box chance calculation

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $1.99 | one-time |


## Frequently asked questions

### Is Deep Sky Diary free?

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

### Is Satoshi Sidekick free?

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

### Which has better reviews, Deep Sky Diary or Satoshi Sidekick?

Deep Sky Diary and Satoshi Sidekick are both rated 5.0 out of 5 on the App Store, from 2 and 5 ratings respectively.

### Do Deep Sky Diary or Satoshi Sidekick have ads?

Satoshi Sidekick shows ads; Deep Sky Diary does not.

### Which is updated more often, Deep Sky Diary or Satoshi Sidekick?

Deep Sky Diary ships an update every 3 days, and Satoshi Sidekick every 2 weeks. Most recently, Deep Sky Diary was updated on November 3, 2026 and Satoshi Sidekick on November 3, 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.*