# TETSUO vs ぼくのメダカ

The clearest difference is ads: TETSUO at none against ぼくのメダカ's shown. TETSUO also leads on iOS requirement (7.1 vs 17.0). On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Both ship on a similar rhythm, roughly every 2 months. Both last shipped on October 29, 2026.

## The numbers

| Metric | TETSUO | ぼくのメダカ |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/tetsuo/id886919934/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Free | — |
| Size | 17 MB | 15 MB |
| Requires iOS | **7.1** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 12+ | 4+ |
| Developer | [NAKAYUBI CORPORATION](https://appshunter.io/developer/826300169) | [mikito oba](https://appshunter.io/developer/1563726163) |

## What reviewers say

### TETSUO

[App page](https://appshunter.io/ios/app/tetsuo/id886919934)

Tap a mysterious creature to help it grow and age. Collect memories of your time together to complete a photo album. Aim for high scores and see your creature evolve.

**Highlights:** Tap to grow creature, Creature ages over time, Collect memories, Complete photo album, High score tracking

**Features:** macOS Compatibility

**In-app purchases:** none


### ぼくのメダカ

[App page](https://appshunter.io/ios/app/id6794945815)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is TETSUO free?

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

### Is ぼくのメダカ free?

ぼくのメダカ is free to download, with no in-app purchases.

### Do TETSUO or ぼくのメダカ have ads?

ぼくのメダカ shows ads; TETSUO does not.

### Which is updated more often, TETSUO or ぼくのメダカ?

TETSUO ships an update every 2 months, and ぼくのメダカ every 2 months. Most recently, TETSUO was updated on October 29, 2026 and ぼくのメダカ on October 29, 2026.

---

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