# IMAIOS e vs GAPP Guidelines

The clearest difference is in-app purchases: GAPP Guidelines at none against IMAIOS e's 2. GAPP Guidelines also leads on iOS requirement (9.0 vs 16.6). IMAIOS e's advantage is update cadence (every 9 days vs every 5 months) and chart position (#109 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. GAPP Guidelines asks for nothing beyond the download.

IMAIOS e ships an update every 9 days, GAPP Guidelines every 5 months. The most recent releases landed on September 29, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | IMAIOS e | GAPP Guidelines |
| --- | --- | --- |
| 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 5 months |
| Monetization | Free with in-app purchases | — |
| Best chart rank | **#109** | — |
| Size | 2.1 GB | 45 MB |
| Requires iOS | 16.6 | **9.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 17+ | 17+ |
| Developer | [IMAIOS](https://appshunter.io/developer/334876406) | [Medical EGuides](https://appshunter.io/developer/1133990851) |

## What reviewers say

### IMAIOS e

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

**Currently charting:** #109 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 |


### GAPP Guidelines

[App page](https://appshunter.io/ios/app/gapp-guidelines/id659325458)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is IMAIOS e free?

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

### Is GAPP Guidelines free?

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

### Do IMAIOS e or GAPP Guidelines have ads?

Neither IMAIOS e nor GAPP Guidelines shows ads.

### Which is updated more often, IMAIOS e or GAPP Guidelines?

IMAIOS e ships an update every 9 days, and GAPP Guidelines every 5 months. Most recently, IMAIOS e was updated on September 29, 2026 and GAPP Guidelines on September 27, 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.*