# IMAIOS e vs FP Notebook

The clearest difference is monetization model: IMAIOS e at free with in-app purchases against FP Notebook's subscription. IMAIOS e also leads on update cadence (every 9 days vs every 2 months). FP Notebook's advantage is review sentiment (58% vs 48%) and iOS requirement (14.3 vs 16.6). On price, rating, ratings volume and ads there is nothing between them.

Both are free to download. IMAIOS e sells 2 in-app purchases, starting at $21.99 per month and FP Notebook sells 3 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.9 for IMAIOS e against 4.8 for FP Notebook. Both are backed by a comparable volume of ratings — 1.4K and 3.3K respectively. Written reviews are what separate them: 48% of IMAIOS e's written reviews are positive against 58% of FP Notebook's.

IMAIOS e ships an update every 9 days, FP Notebook every 2 months. Both last shipped on September 23, 2026.

## The numbers

| Metric | IMAIOS e | FP Notebook |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (1.4K ratings)](https://appshunter.io/ios/app/imaios-e-anatomy/id334876403/reviews)** | [4.8 (3.3K ratings)](https://appshunter.io/ios/app/fp-notebook/id835973313/reviews) |
| Number of ratings | 1.4K | **3.3K** |
| Positive reviews | 47.9% of reviews | **58.2% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 9 days** | Every 2 months |
| Monetization | **Free with in-app purchases** | Subscription |
| Best chart rank | #62 | **#51** |
| Size | 2.1 GB | 134 MB |
| Requires iOS | 16.6 | **14.3** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 17+ | 17+ |
| Developer | [IMAIOS](https://appshunter.io/developer/334876406) | [Atmosphere Apps, Inc.](https://appshunter.io/developer/334077424) |

## What reviewers say

### IMAIOS e

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

**Currently charting:** #62 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 |


### FP Notebook

[App page](https://appshunter.io/ios/app/fp-notebook/id835973313)

**Currently charting:** #51 Top Grossing · Medical (US App Store)

A comprehensive medical reference for primary care and emergency clinicians, offering rapid access to over 6100 interlinked topic pages. Content is updated monthly through literature reviews and conferences, providing up-to-date information for medical professionals.

**Highlights:** Rapid access medical reference, Over 6100 interlinked topic pages, Content updated monthly, 31 specialty books, 700+ chapters, Point-of-care tool

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $1.99 | per month |
| Annual Subscription | $19.99 | per year |
| Annual Sub | $24.99 | per year |

**What reviewers like**

- 🌟 Excellent, comprehensive medical reference
- ⚡️ Efficient, concise, and easy to use
- 🧠 Invaluable for medical students, residents, and practitioners
- 🤝 Highly recommended by users
- 🕰️ Frequently used and relied upon for years

**What reviewers complain about**

- 💰 Subscription model frustrates some users who previously had free access
- 🐞 Occasional app freezing or crashing issues reported
- 🔍 Built-in search function could be improved

**Reported bugs**

- App freezing or crashing on certain devices
- Subscription issues or unexpected charges

**Requested features**

- Ability to earn continuing education credits through the app
- Improved search functionality


## Frequently asked questions

### Is IMAIOS e free?

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

### Is FP Notebook free?

FP Notebook is free to download, with in-app purchases available.

### Which has better reviews, IMAIOS e or FP Notebook?

IMAIOS e is rated higher. IMAIOS e averages 4.9 out of 5 from 1.4K ratings, while FP Notebook averages 4.8 from 3.3K ratings.

### Do IMAIOS e or FP Notebook have ads?

Neither IMAIOS e nor FP Notebook shows ads.

### Which is updated more often, IMAIOS e or FP Notebook?

IMAIOS e ships an update every 9 days, and FP Notebook every 2 months. Most recently, IMAIOS e was updated on September 23, 2026 and FP Notebook on September 23, 2026.

### Which is more popular, IMAIOS e or FP Notebook?

IMAIOS e currently peaks at #62 in the App Store charts, and FP Notebook at #51. Chart position reflects recent download velocity rather than total install base.

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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.*