# IMAIOS e vs f

The clearest difference is in-app purchases: f at none against IMAIOS e's 2. f also leads on iOS requirement (12.0 vs 16.6). IMAIOS e's advantage is update cadence (every 9 days vs every 8 months) and chart position (#119 vs unranked). On price, ads and device support there is nothing between them.

Both are free to download. IMAIOS e sells 2 in-app purchases, starting at $21.99 per month. f asks for nothing beyond the download.

IMAIOS e ships an update every 9 days, f every 8 months. The most recent releases landed on October 24, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | IMAIOS e | f |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (1.4K ratings)](https://appshunter.io/ios/app/imaios-e-anatomy/id334876403/reviews)** | — |
| Number of ratings | **1.4K** | — |
| Positive reviews | 47.9% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 9 days** | Every 8 months |
| Monetization | Free with in-app purchases | — |
| Best chart rank | **#119** | — |
| Size | 2.1 GB | 10 MB |
| Requires iOS | 16.6 | **12.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 17+ | 17+ |
| Developer | [IMAIOS](https://appshunter.io/developer/334876406) | [Holonic Systems,Y.K.](https://appshunter.io/developer/1504218692) |

## What reviewers say

### IMAIOS e

[App page](https://appshunter.io/ios/app/imaios-e-anatomy/id334876403)

**Currently charting:** #119 Top Grossing · Medical (US App Store)

This comprehensive human anatomy atlas offers over 26,000 medical images, including various views and illustrations. It allows users to explore anatomical structures with interactive features and multiple language options. A free preview is available before subscribing to the full, continuously updated atlas.

**Highlights:** 26,000+ medical and anatomical images, Axial, coronal, sagittal views, Radiography and angiography images, Dissection pictures and illustrations, Interactive labeling and search, 12 language options

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| e-Anatomy monthly Subscription | $21.99 | per month |
| e-Anatomy one year Subscription | $132.99 | per year |


### f

[App page](https://appshunter.io/ios/app/f-tree/id1504218693)

**In-app purchases:** none


## Frequently asked questions

### Is IMAIOS e free?

IMAIOS e is free to download, with in-app purchases available.

### Is f free?

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

### Do IMAIOS e or f have ads?

Neither IMAIOS e nor f shows ads.

### Which is updated more often, IMAIOS e or f?

IMAIOS e ships an update every 9 days, and f every 8 months. Most recently, IMAIOS e was updated on October 24, 2026 and f on October 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.*