# Utsuro’s diary vs Rainbow Sea

The clearest difference is in-app purchases: Rainbow Sea at none against Utsuro’s diary's 5. Utsuro’s diary's advantage is ratings volume (443 vs 28) and iOS requirement (9.0 vs 12.0). On price, rating, review sentiment and update cadence there is nothing between them.

Both are free to download. Utsuro’s diary sells 5 one-off in-app purchases. Rainbow Sea asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.6 for Utsuro’s diary against 4.6 for Rainbow Sea. That said, the two scores are not equally well evidenced: Utsuro’s diary has 443 ratings behind it against 28, so its average is the more settled of the two. Written reviews are what separate them: 77% of Utsuro’s diary's written reviews are positive against 73% of Rainbow Sea's.

Utsuro’s diary ships an update every 5 weeks, Rainbow Sea every 6 weeks. The most recent releases landed on November 6, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Utsuro’s diary | Rainbow Sea |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (443 ratings)](https://appshunter.io/ios/app/utsuros-diary/id1459925714/reviews)** | [4.6 (28 ratings)](https://appshunter.io/ios/app/rainbow-sea/id1523118441/reviews) |
| Number of ratings | **443** | 28 |
| Positive reviews | **76.8% of reviews** | 73.3% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | **Every 5 weeks** | Every 6 weeks |
| Monetization | Free with in-app purchases | **Ad-supported** |
| Size | 266 MB | 100 MB |
| Requires iOS | **9.0** | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 9+ | 12+ |
| Developer | [YANASE GAMES, INC.](https://appshunter.io/developer/1426325846) | [Rina Okuyama](https://appshunter.io/developer/1510274776) |

## What reviewers say

### Utsuro’s diary

[App page](https://appshunter.io/ios/app/utsuros-diary/id1459925714)

Engage in a chilling diary exchange with an obsessive girlfriend. What begins as a popular trend quickly escalates into a terrifying nightmare for the main character.

**Highlights:** Diary exchange gameplay, Obsessive girlfriend narrative, Socialable high school student protagonist, Nightmare escalation, Interactive story

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Akari, Utsuro happy ending | $4.99 | one-time |
| Natsuna and Utsuro route | $7.99 | one-time |
| Kokoro and Utsuro route | $7.99 | one-time |
| Utsuro date | $11.99 | one-time |
| All Edition All Stories | $15.99 | one-time |

**What reviewers like**

- 🎨 Beautiful art style and character designs
- 🎤 Great voice acting quality
- 📖 Engaging story with plot twists
- 😱 Effective psychological horror elements
- 💰 Affordable pricing

**What reviewers complain about**

- 🐛 Frequent app crashes
- 📝 Poor English translation and grammar
- 🎭 Unclear dialogue attribution (talking vs thinking)
- 💸 High pricing for additional story endings
- 📱 Compatibility issues with older devices

**Reported bugs**

- App crashes when starting new story or day
- Game crashes on iPhone 6 with iOS 12.5.1
- Blank message on day three blocks progression
- App closes itself after recent updates
- Save data lost upon game reinstallation

**Requested features**

- Auto-read/text-to-speech functionality
- Player character gender customization
- Improved dialogue clarity indicators
- Better save data persistence across reinstalls
- Reduced ad frequency


### Rainbow Sea

[App page](https://appshunter.io/ios/app/rainbow-sea/id1523118441)

Embark on a pixel-art adventure where you nurture relationships with seven gods aboard a treasure ship. Your choices shape a bittersweet story with multiple endings, offering replayability. Discover events and uncover the gods' true natures through dialogue and interaction.

**Highlights:** Isometric pixel-art graphics, Chiptune-inspired music, Branching narrative with multiple endings, Relationship building with seven gods, Interactive dialogue system, Event discovery based on conditions

**In-app purchases:** none


## Frequently asked questions

### Is Utsuro’s diary free?

Utsuro’s diary is free to download, with in-app purchases available.

### Is Rainbow Sea free?

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

### Which has better reviews, Utsuro’s diary or Rainbow Sea?

Utsuro’s diary is rated higher. Utsuro’s diary averages 4.6 out of 5 from 443 ratings, while Rainbow Sea averages 4.6 from 28 ratings.

### Do Utsuro’s diary or Rainbow Sea have ads?

Both Utsuro’s diary and Rainbow Sea show ads.

### Which is updated more often, Utsuro’s diary or Rainbow Sea?

Utsuro’s diary ships an update every 5 weeks, and Rainbow Sea every 6 weeks. Most recently, Utsuro’s diary was updated on November 6, 2026 and Rainbow Sea 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.*