mizutamaWeightControl vs Deep Sky Diary
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
mizutamaWeightControl
Track your weight and body fat with this cute, illustrated health app. Record essential data like weight and body fat percentage, with optional fields for memos, target weight, and height. Enjoy a visually appealing interface with free dress-up screens, some unlocked by watching ads.
- Weight tracking
- Body fat percentage logging
- Memos and notes
- Target weight setting
- Height recording
- Illustrated dress-up screens
- Graph visualization
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A weight management app with cute mizutama illustrations is now available. Input is simple, and you can use just your weight. Items other than weight can be recorded only if necessary. -body weight -body fat percentage -Memo -Target weight -height There is no limit to the displayable period. If you go back in the graph, you can see how old the data is. Press the circle on the graph to display detailed data. In addition to weight and body fat percentage, you can also check notes and marks. All 14 kinds of dress-up screens with mizutama's illustrations can be used for free. (Some designs can be used by watching ads.) This application will display advertisements for free use. Thank you for your understanding.
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.
Screenshots
Verdict
The clearest difference is ads: Deep Sky Diary at none against mizutamaWeightControl's shown. Deep Sky Diary also leads on update cadence (every 3 days vs fortnightly) and monetization model (free vs ad-supported). On price, rating, ratings volume and in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
On the App Store both sit at effectively the same score — 5.0 for mizutamaWeightControl against 5.0 for Deep Sky Diary. Both are backed by a comparable volume of ratings — 3 and 2 respectively.
mizutamaWeightControl ships an update fortnightly, Deep Sky Diary every 3 days. The most recent releases landed on October 24, 2026 and October 11, 2026 respectively.
| Parameter | mizutamaWeightControl | Deep Sky Diary |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (3 ratings) | 5.0 (2 ratings) |
| Positive reviews | 40.0% of reviews | — |
| Number of ratings | 3 — better | 2 |
| Update frequency | Fortnightly | Every 3 days — better |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | Ad-supported | Free — better |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 14.0 — better | 14.1 |
| Further details — not scored | ||
| Size | 67 MB | 8 MB |
| Age rating | 4+ | 4+ |
| Developer | NORIHIKO HAYASAKA | Shunzhe Ma |
Customer experience
mizutamaWeightControl
Deep Sky Diary
In-app purchases
mizutamaWeightControl
No in-app purchases
Deep Sky Diary
No in-app purchases
Questions
Is mizutamaWeightControl free?
Is Deep Sky Diary free?
Which has better reviews, mizutamaWeightControl or Deep Sky Diary?
Do mizutamaWeightControl or Deep Sky Diary have ads?
Which is updated more often, mizutamaWeightControl or Deep Sky Diary?
Other comparisons
