# Pasterium C — A quiet little 3D aquarium

> A quiet little 3D aquarium (iPhone/iPad app by KENICHI TAKAOKA.)

- Source: https://appshunter.io/ios/app/pasterium-c/id6817622470 (this page in markdown: same URL + `.md`)
- Developer: [KENICHI TAKAOKA](https://appshunter.io/developer/6804616082)
- Category: Games, Entertainment, Casual, Simulation
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 16.0 · 19 MB
- Languages: American English, Arabic, French (France), German (Germany), Japanese, Korean, European Portuguese, Chinese (Simplified, China), European Spanish, Chinese (Traditional, Taiwan)
- Released: 2026-10-05
- Data updated: 2026-10-24

## What is Pasterium C?

Spend quiet days with your fish in a little aquarium.

Pasterium C is a 3D aquarium set in a softly muted pastel room, where you enjoy everyday life with your fish.
You start with three little fish in a fishbowl. Give them names, feed them, and watch them slowly grow and bond with you.

- Every fish has its own personality and looks
Even fish of the same kind each have something special. Keep an eye on growth, bond, and health on each fish’s card. Fish that feel weak can get care, or rest at boarding.

- A life that grows a little every day
New friends and ornaments arrive, and sometimes eggs are laid. On day 7 the living room tank opens, and on day 14 you get an auto feeder you can use in any tank.

- Make the tank your own
Choose plants, ornaments, sand colors, and lighting to decorate. Save up to 5 favorite layouts for each tank.

- Learn about creatures and ornaments in your journal
Look back on each day in the diary, and read about each one in the creature and ornament guides.

- Shifting light and gentle sounds
The light in the room changes from morning to night and with the seasons. Watch your fish from underwater, and keep photos or short videos. Choose between the original music and lofi, with different tracks for morning, day, and night. You can choose your tap sounds too.

- Start for free, then visit the study
The fishbowl and the living room are free. “Study with a Bookshelf” is a one-time in-app purchase. It adds a big tank about 120 cm wide, along with Discus, Arowana, River Stingray, and Axolotl.

Available in Japanese, English, Korean, Arabic, Simplified and Traditional Chinese, Spanish, French, German, and Portuguese.

No ads and no account sign-up. Everyday play works offline. Buying and restoring the in-app purchase needs a connection.
Your fish, diary, and other records are saved in the app. Deleting the app also deletes these records, but photos and videos you saved to the Photos app remain.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Study with a Bookshelf | $2.99 | one-time |


## Is Pasterium C safe?

Not enough ratings yet to assess Pasterium C.

## Is Pasterium C legit?

Pasterium C appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for Pasterium C is 65 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 4 releases)

### 1.3 — 2026-10-21

• Added eight languages, including Korean and Arabic, for a total of ten.
• Choose original music or lofi, with tracks for morning, day, and night.
• See a larger preview of each photo, then choose to save or share it.
• Improved feeding so bottom dwellers and slower eaters have more chances to eat in a mixed tank.
• Tank choices now consider each species’ maximum body length.
• Refined the room windows and guide, and improved rendering, loading, and music playback.

### 1.2 — 2026-10-15

• New music: a different tune plays in the morning, during the day and at night.

### 1.1 — 2026-10-11

• Pasterium C is now available in English. If your iPhone isn’t set to Japanese, the app appears in English (you can also choose in Settings → Pasterium C → Language).
• A shorter first-time guide, with a quick tip the first time you open each feature.
• The creature and ornament guides now show ones you haven’t met yet as “?”, and open them when you meet them.
• Eggs hatch in 3 days, and babies grow up in about 5 days.
• Easier on your battery: motion is reduced while you aren’t touching the screen or when your iPhone is warm.
• Fixed an issue where fish with the same name could be renamed when moving tanks.

### 1.0 — 2026-10-06

No release notes.

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## More apps by KENICHI TAKAOKA

- [英単貯蓄](https://appshunter.io/ios/app/id6804616080)
- [SURARI: Posture Coach](https://appshunter.io/ios/app/surari-posture-coach/id6804976997)
- [Aqua Kurashi](https://appshunter.io/ios/app/aqua-kurashi/id6815044530)

All apps by KENICHI TAKAOKA: https://appshunter.io/developer/6804616082

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-24.*