# mizutamaWeightControl vs Deep Sky Diary

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.

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.

## The numbers

| Metric | mizutamaWeightControl | Deep Sky Diary |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (3 ratings)](https://appshunter.io/ios/app/mizutamaweightcontrol/id1478461857/reviews) | [5.0 (2 ratings)](https://appshunter.io/ios/app/deep-sky-diary/id1510396752/reviews) |
| Number of ratings | **3** | 2 |
| Positive reviews | 40.0% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Fortnightly | **Every 3 days** |
| Monetization | Ad-supported | **Free** |
| Size | 67 MB | 8 MB |
| Requires iOS | **14.0** | 14.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [NORIHIKO HAYASAKA](https://appshunter.io/developer/512237338) | [Shunzhe Ma](https://appshunter.io/developer/1052286218) |

## What reviewers say

### mizutamaWeightControl

[App page](https://appshunter.io/ios/app/mizutamaweightcontrol/id1478461857)

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.

**Highlights:** Weight tracking, Body fat percentage logging, Memos and notes, Target weight setting, Height recording, Illustrated dress-up screens, Graph visualization

**Features:** Vision Pro support

**In-app purchases:** none


### 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

**In-app purchases:** none


## Frequently asked questions

### Is mizutamaWeightControl free?

mizutamaWeightControl is free to download, with no in-app purchases.

### Is Deep Sky Diary free?

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

### Which has better reviews, mizutamaWeightControl or Deep Sky Diary?

mizutamaWeightControl and Deep Sky Diary are both rated 5.0 out of 5 on the App Store, from 3 and 2 ratings respectively.

### Do mizutamaWeightControl or Deep Sky Diary have ads?

mizutamaWeightControl shows ads; Deep Sky Diary does not.

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

mizutamaWeightControl ships an update fortnightly, and Deep Sky Diary every 3 days. Most recently, mizutamaWeightControl was updated on October 24, 2026 and Deep Sky Diary on October 11, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*