Comparison

IMAIOS e vs GadCalc

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

GadCalc

This medical app assists with calculating MRI contrast agent doses. It provides access to package inserts and lists standard and specific doses for FDA-approved agents. It's a convenient tool for healthcare professionals.

Highlights
  • Calculate MRI contrast agent dose
  • View contrast agent package inserts
  • Access online and offline inserts
  • Look up standard doses
  • Find University of Wisconsin specific doses
Features
Read full description

The University of Wisconsin Gadolinium Calculator (GadCalc) app is an easy and convenient way to help you: • Calculate MRI contrast agent dose • View package inserts for contrast agents, either online or offline • Look up standard, and University of Wisconsin specific, doses for all FDA approved contrast agents If you have questions, problems or feedback, please reach us at radweb@uwhealth.org

Screenshots

IMAIOS e4 screens
GadCalc3 screens

Verdict

The call

The clearest difference is in-app purchases: GadCalc at none against IMAIOS e's 2. GadCalc also leads on iOS requirement (12.0 vs 16.6). IMAIOS e's advantage is update cadence (every 9 days vs every 18 months) and ratings volume (1.4K vs 2). On price, rating, 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. GadCalc asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.9 for IMAIOS e against 5.0 for GadCalc. That said, the two scores are not equally well evidenced: IMAIOS e has 1.4K ratings behind it against 2, so its average is the more settled of the two.

UpkeepUpdate frequency

IMAIOS e ships an update every 9 days, GadCalc every 18 months. The most recent releases landed on October 26, 2026 and September 29, 2026 respectively.

Scorecard6 real differences · 5 level
IMAIOS e versus GadCalc: the parameters behind the verdict, then further details
ParameterIMAIOS eGadCalc
PriceFreeFree
Rating4.9 (1.4K ratings)5.0 (2 ratings) — better
Positive reviews47.9% of reviews—
Number of ratings1.4K — better2
Update frequencyEvery 9 days — betterEvery 18 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
Best chart rank#79 — better—
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS16.612.0 — better
Further details — not scored
Size2.1 GB9 MB
Age rating17+17+
DeveloperIMAIOSUniversity of Wisconsin-Madison Shared Apps

Customer experience

IMAIOS e

All ratings1,428 ratings
Positive97.1%
Neutral0.9%
Negative2.0%
Written reviews305 reviews
Positive47.9%
Neutral10.8%
Negative41.3%

GadCalc

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

2 purchases

IMAIOS e

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

GadCalc

No in-app purchases

Questions

Is IMAIOS e free?
IMAIOS e is free to download, with in-app purchases available.
Is GadCalc free?
GadCalc is free to download, with no in-app purchases.
Which has better reviews, IMAIOS e or GadCalc?
GadCalc is rated higher. IMAIOS e averages 4.9 out of 5 from 1.4K ratings, while GadCalc averages 5.0 from 2 ratings.
Do IMAIOS e or GadCalc have ads?
Neither IMAIOS e nor GadCalc shows ads.
Which is updated more often, IMAIOS e or GadCalc?
IMAIOS e ships an update every 9 days, and GadCalc every 18 months. Most recently, IMAIOS e was updated on October 26, 2026 and GadCalc on September 29, 2026.

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