Comparison

IMAIOS e vs ACR Guidance

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

IMAIOS e

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
Currently charting
Read full description

IMAIOS e-Anatomy is an atlas of human anatomy for physicians, radiologists, medical students and radiology technicians. Get a sneak peek at more than 26 000 medical and anatomical images for free before subscribing to our detailed atlas of human anatomy. e-Anatomy is based on the award-winning IMAIOS e-Anatomy online atlas. Carry with you the most complete reference of human anatomy, wherever you go, on your mobile device or tablet. e-Anatomy has over 26 000 images containing series of images in axial, coronal and sagittal views as well as radiography, angiography, dissection pictures, anatomical charts and illustrations. All medical images were carefully labeled, more than 967 000 labels available in 12 languages including the Latin Terminologia Anatomica. (More details on: https://www.imaios.com/en/e-Anatomy) Features: - Scroll through image sets by dragging your finger - Zoom in and out - Tap labels to display anatomical structures - Select anatomical labels by category - Easily locate anatomical structures thanks to the index search - Multiple screen orientations - Switch languages at the touch of a button The subscription also gives you access to e-Anatomy on IMAIOS website. e-Anatomy is an atlas of anatomy continuously being improved: updates and new module are part of the subscription! Additional downloads are required for full use of the application. The medical information on this application is provided as a tool and reference for use by licensed medical professionals, competent healthcare professionals and no others, it does not and should not be construed as any form of medical diagnosis or professional medical advice on any matter. About module activation. IMAIOS e-Anatomy has three methods of activation for our different users: 1) IMAIOS members who have access provided by their university or library, may use their user account to enjoy full access to all modules. However, an internet connection is periodically required to verify their user account. 2) Users who have purchased the modules in previous versions of IMAIOS e-Anatomy can use the ""Restore"" feature to activate all previously purchased content. You will not be charged again and the content available by the time of your purchase is permanently accessible offline. 3) New users are invited to subscribe to e-Anatomy. All modules and features will be active for a limited period of time. Subscriptions will be automatically renewed so that they can enjoy continuous access to e-Anatomy. Additional auto-renewable subscription Information: - Subscription automatically renews unless auto-renew is turned off at least 24 hours prior to the end of the current period. - Subscriptions and auto-renewals may be turned off by going to the user's account settings on the App Store after purchase. - No cancellation of the current subscription is allowed during the active subscription period. The screenshots are part of the full e-Anatomy application with all modules enabled. Privacy Policy and Terms of Use - https://www.imaios.com/en/privacy-policy - https://www.imaios.com/en/conditions-of-access-and-use"

About

ACR Guidance

Access clinical guidance content from the ACR on your mobile device. Includes resources for contrast reactions, reporting systems, and incidental findings. Designed for healthcare professionals needing on-the-go reference materials.

Highlights
  • Interactive clinical guidance
  • ACR Contrast Reaction Cards
  • Reporting and Data Systems (RADS) content
  • Incidental Findings (IF) content
  • On-the-go reference materials
Features
Read full description

The ACR® Guidance App provides interactive mobile access to select clinical guidance content from the ACR website. Download to access the ACR Contrast Reaction Cards, Reporting and Data Systems (RADS), and Incidental Findings (IF) content. This app is intended for healthcare professionals such as radiologists, oncologists, referring physicians, and medical students who desire on the go reference materials from ACR. This app is not a medical device and should not be considered as one. ACR provides this mobile app for reference purposes only. It is not intended to substitute for the independent clinical judgment of a physician or other health care professional user. A physician or other user is solely responsible for verifying the currency and applicability of app content to a particular clinical situation and thus assumes all risk of use. As allowable under applicable law, ACR and ACR’s employees, officers, directors, agents, contractors and volunteers will not be liable for any damages arising out of the use or misuse of the app, its content, or calculations. This includes but is not limited to a user’s inability to access the app or any loss or corruption of a user’s data.

Screenshots

IMAIOS e4 screens
ACR Guidance4 screens

Verdict

The call

The clearest difference is rating: IMAIOS e at 4.9 against ACR Guidance's 3.1. IMAIOS e also leads on update cadence (every 9 days vs every 2 months) and ratings volume (1.4K vs 12). ACR Guidance's advantage is in-app purchases (none vs 2) and iOS requirement (15.0 vs 17.6). On price, ads and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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

ReceptionRating · Positive reviews · Number of ratings

IMAIOS e holds the better App Store score, 4.9 against 3.1. That said, the two scores are not equally well evidenced: IMAIOS e has 1.4K ratings behind it against 12, so its average is the more settled of the two. Written reviews point the same way: 48% of IMAIOS e's written reviews are positive against 25% of ACR Guidance's.

UpkeepUpdate frequency

IMAIOS e ships an update every 9 days, ACR Guidance every 2 months. The most recent releases landed on November 10, 2026 and November 3, 2026 respectively.

Scorecard8 real differences · 3 level
IMAIOS e versus ACR Guidance: the parameters behind the verdict, then further details
ParameterIMAIOS eACR Guidance
PriceFreeFree
Rating4.9 (1.4K ratings) — better3.1 (12 ratings)
Positive reviews47.9% of reviews — better25.0% of reviews
Number of ratings1.4K — better12
Update frequencyEvery 9 days — betterEvery 2 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
Best chart rank#151 — better—
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS17.615.0 — better
Further details — not scored
Size2.1 GB111 MB
Age rating17+17+
DeveloperIMAIOSThe American College of Radiology

Customer experience

IMAIOS e

All ratings1,440 ratings
Positive97.1%
Neutral0.9%
Negative2.0%
Written reviews307 reviews
Positive47.9%
Neutral10.7%
Negative41.4%

ACR Guidance

All ratings12 ratings
Positive50.0%
Neutral0.0%
Negative50.0%
Written reviews4 reviews
Positive25.0%
Neutral0.0%
Negative75.0%

In-app purchases

2 purchases

IMAIOS e

Subscriptions2
  • e-Anatomy monthly Subscription$21.991 Month
  • e-Anatomy one year Subscription$132.991 Year
None

ACR Guidance

No in-app purchases

Questions

Is IMAIOS e free?
IMAIOS e is free to download, with in-app purchases available.
Is ACR Guidance free?
ACR Guidance is free to download, with no in-app purchases.
Which has better reviews, IMAIOS e or ACR Guidance?
IMAIOS e is rated higher. IMAIOS e averages 4.9 out of 5 from 1.4K ratings, while ACR Guidance averages 3.1 from 12 ratings.
Do IMAIOS e or ACR Guidance have ads?
Neither IMAIOS e nor ACR Guidance shows ads.
Which is updated more often, IMAIOS e or ACR Guidance?
IMAIOS e ships an update every 9 days, and ACR Guidance every 2 months. Most recently, IMAIOS e was updated on November 10, 2026 and ACR Guidance on November 3, 2026.

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