# Circulatory vs Visible Cat

The clearest difference is price: Visible Cat at Free against Circulatory's $1.99. Visible Cat also leads on update cadence (every 4 days vs every 52 months). Circulatory's advantage is in-app purchases (none vs 3). On ads, device support and iOS requirement there is nothing between them.

Visible Cat is free to download; Circulatory costs $1.99 up front. Visible Cat sells 3 in-app purchases, starting at $1.99 per month. Circulatory asks for nothing beyond the download.

Circulatory ships an update every 52 months, Visible Cat every 4 days. The most recent releases landed on November 3, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | Circulatory | Visible Cat |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | — | **[1.0 (1 ratings)](https://appshunter.io/ios/app/visible-cat/id6505015749/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 52 months | **Every 4 days** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 270 MB | 284 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [VIRTUAL FILAMENTS PRIVATE LIMITED](https://appshunter.io/developer/1474217212) | [荣杰 章](https://appshunter.io/developer/1736051678) |

## What reviewers say

### Circulatory

[App page](https://appshunter.io/ios/app/circulatory-edutech-era/id1592057769)

Explore the human circulatory system with interactive visuals and engaging activities. This app simplifies complex biological concepts about the heart, blood, and blood vessels for students and teachers. Make learning anatomy fun and practical.

**Highlights:** Interactive diagrams and models, Step-by-step explanations, Engaging learning activities, Student-friendly design, Focus on biology learning, Real-life health connections

**Features:** macOS Compatibility

**In-app purchases:** none


### Visible Cat

[App page](https://appshunter.io/ios/app/visible-cat/id6505015749)

Explore the intricate 3D anatomy of a cat with this educational app. Ideal for veterinary professionals and students, it allows detailed examination of skeletal, muscular, nervous, and organ systems. Easily isolate, hide, or reveal specific structures for in-depth learning.

**Highlights:** 3D cat anatomy model, Toggle anatomy systems, Structure descriptions, Show/hide structures, Search anatomical structures, Multi-language support

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Version 1 Month | $1.99 | per month |
| Full Version 3 Months | $2.99 | per 3 months |
| Full Version 1 Year | $9.99 | per year |


## Frequently asked questions

### Is Circulatory free?

Circulatory costs $1.99, with no in-app purchases.

### Is Visible Cat free?

Visible Cat is free to download, with in-app purchases available.

### Do Circulatory or Visible Cat have ads?

Neither Circulatory nor Visible Cat shows ads.

### Which is updated more often, Circulatory or Visible Cat?

Circulatory ships an update every 52 months, and Visible Cat every 4 days. Most recently, Circulatory was updated on November 3, 2026 and Visible Cat on November 4, 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.*