# 3D Fish Anatomy vs phase estimation algorithm

The clearest difference is price: phase estimation algorithm at Free against 3D Fish Anatomy's $11.99. phase estimation algorithm also leads on update cadence (monthly vs every 20 months). 3D Fish Anatomy's advantage is iOS requirement (12.0 vs 16.0). On ads, in-app purchases and device support there is nothing between them.

phase estimation algorithm is free to download; 3D Fish Anatomy costs $11.99 up front. Neither carries in-app purchases, so what you see is what you pay.

3D Fish Anatomy ships an update every 20 months, phase estimation algorithm monthly. The most recent releases landed on October 4, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | 3D Fish Anatomy | phase estimation algorithm |
| --- | --- | --- |
| Price | $11.99 | **Free** |
| Rating | **[4.5 (2 ratings)](https://appshunter.io/ios/app/3d-fish-anatomy/id1151204663/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 20 months | **Monthly** |
| Monetization | Paid | — |
| Size | 115 MB | 12 MB |
| Requires iOS | **12.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Biosphera](https://appshunter.io/developer/569303204) | [Sungjun Kim](https://appshunter.io/developer/1602461985) |

## What reviewers say

### 3D Fish Anatomy

[App page](https://appshunter.io/ios/app/3d-fish-anatomy/id1151204663)

Explore the detailed internal and external anatomy of a perch with an interactive 3D model. View and manipulate systems layer by layer or simultaneously, highlighting structures with captions. Ideal for zoology, ichthyology, and fish biology studies.

**Highlights:** Interactive 3D perch model, View internal and external anatomy, Layer-by-layer system exploration, Adjustable zoom levels, Highlight anatomical structures with captions, Multi-language support

**Features:** Vision Pro support

**In-app purchases:** none


### phase estimation algorithm

[App page](https://appshunter.io/ios/app/phase-estimation-algorithm/id6469448415)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 3D Fish Anatomy free?

3D Fish Anatomy costs $11.99, with no in-app purchases.

### Is phase estimation algorithm free?

phase estimation algorithm is free to download, with no in-app purchases.

### Do 3D Fish Anatomy or phase estimation algorithm have ads?

Neither 3D Fish Anatomy nor phase estimation algorithm shows ads.

### Which is updated more often, 3D Fish Anatomy or phase estimation algorithm?

3D Fish Anatomy ships an update every 20 months, and phase estimation algorithm monthly. Most recently, 3D Fish Anatomy was updated on October 4, 2026 and phase estimation algorithm on October 3, 2026.

---

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