Deep Sky Diary vs Satoshi Sidekick
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Deep Sky Diary
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.
- Regular diary entries
- Scheduled future readings
- Ephemeral black hole messages
- Optional black hole receipt
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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.
Satoshi Sidekick
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.
- NFT shoe optimizer
- Estimate earnings and costs
- Speed range alerts
- Energy timer with voice updates
- Real-time price data integration
- Mystery box chance calculation
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UNOFFICIAL companion application for STEPN. This app was created by a community member and is not affiliated with STEPN in any way. SHOE OPTIMIZER Optimize your earning potential with the shoe optimizer. Save up to six different shoes and calculate your estimated GST & GMT earning, durability loss/repair cost, HP loss/restoration cost, and mystery box chance. See total profit calculated in USD using real-time price data. SPEED ALARM Set a custom speed range or choose the default speed range for your shoe. If you start going too slow or too fast, the app will warn you with an audible alert. ENERGY TIMER WITH OPTIONAL VOICE UPDATES The app will start a timer based on the amount of energy you want to spend. Optional voice updates alert you every five minutes with the amount of time remaining in your workout, and the app will alert you when all of the energy is spent. OPTIONAL VOICE UPDATES FOR SPEED Voice alerts update you on your current speed and/or your average speed for the most recent five minutes.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Deep Sky Diary | Satoshi Sidekick |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) | 5.0 (5 ratings) |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | 2 | 5 — better |
| Update frequency | Every 3 days — better | Every 2 weeks |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 14.1 | 14.0 — better |
| Further details — not scored | ||
| Size | 8 MB | 19 MB |
| Age rating | 4+ | 17+ |
| Developer | Shunzhe Ma | Robert Godfrey |
Customer experience
Deep Sky Diary
Satoshi Sidekick
In-app purchases
Deep Sky Diary
No in-app purchases
Satoshi Sidekick
- Remove Ads$1.99
Questions
Is Deep Sky Diary free?
Is Satoshi Sidekick free?
Which has better reviews, Deep Sky Diary or Satoshi Sidekick?
Do Deep Sky Diary or Satoshi Sidekick have ads?
Which is updated more often, Deep Sky Diary or Satoshi Sidekick?
Other comparisons
