Comparison

ATA Thyrosim vs Modern Thyroid Clinic

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

Head to head
About

ATA Thyrosim

Features
Currently charting
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The app was developed and well-validated from real normal and hypothyroid human data and it features a simple and intuitive user interface, designed to promote understanding of the basic physiology of this complex endocrine system – by laypersons as well as by clinicians and clinical educators and researchers. THYROSIM is particularly useful for understanding and safely exploring effects of perturbing the real system, in various ways – without the need for any real human or animal experimentation. The DIRECTIONS and EXAMPLE explain and illustrate normal physiological conditions. Users can then conduct simulated ‘‘what-if’’ experiments, to challenge the simulation model with abnormal conditions – as explained on the app interface pages. For example, users can simulate hypothyroidism (when the thyroid hormone level in blood is too low) or thyroid hormone malabsorption from the gut. Patients with hypothyroidism can visualize the effects of thyroid hormone replacement therapy, promoting adherence to their doctor’s dosing prescriptions, and also understand better why they should take thyroid hormone replacement drugs without food – facilitating understanding of impaired absorption of the drug in the presence of food. Thyroid cancer patients (any layperson) can visualize the effects of partial or complete surgical removal of the thyroid gland (thyroidectomy) on blood hormone levels, and thereby understand why they need individualized hormone replacement therapy, and so on. Physicians and laypersons can use THYROSIM as a patient education tool. Scientists can use THYROSIM for clinical research purposes. Clinical and pharmacology educators can use THYROSIM to teach medical and pharmacology students basic thyroid hormone physiology and pathophysiology, complete with easy to understand graphical renditions of the results of “what-if” experimentation with the simulator. Trainees and other students can benefit from use of THYROSIM as a means to deepen and test their understanding the complexities of the “pituitary-thyroid axis”, the primary organ interactions regulating blood thyroid hormone levels by feedback control. The THYROSIM model has been the basis for several important clinical study applications for well over a decade, with details published in the medical journals Thyroid and Frontiers in Endocrinology. Disclaimer: This tool is for simulation and visualization and does not establish a standard of care. Treatment decisions must be made based on the independent judgment of health care providers and each patient’s individual circumstances. This tool is not intended to take the place of physician judgment in diagnosing and treatment of particular patients. The American Thyroid Association® considers use of this resource to be voluntary. Please see the following publication reference for information on the background and process behind the mobile app: Predicting Optimal Combination LT4 + LT3 Therapy for Hypothyroidism Based on Residual Thyroid Function https://www.frontiersin.org/articles/10.3389/fendo.2019.00746/full

About

Modern Thyroid Clinic

Features
Read full description

We specialize in treatment for thyroid and certain endocrine disorders using progressive methodologies to give patients their lives back. We believe that a patient's symptoms, not just lab results, should guide treatment. HealthKit Our App request access to your Health Kit should you decide to share your vitals with your provider. You can add or remove these permissions at any time. Disclaimer: This app is intended for communication purposes only - this application is not intended in any way to offer medical advice for any medical conditions. Please seek medical attention and or call your local emergency line should you need medical assistance. Our App request access to your Health Kit should you decide to share your vitals with your provider. You can add or remove these permissions at any time. Medical Information Resource Page Cdc.gov | Who.org | IFM.org | Fda.gov

Screenshots

ATA Thyrosim3 screens
Modern Thyroid Clinic4 screens

Verdict

The call

The clearest difference is price: Modern Thyroid Clinic at Free against ATA Thyrosim's $3.99. Modern Thyroid Clinic also leads on update cadence (every 8 days vs every 41 months). ATA Thyrosim's advantage is chart position (#122 vs unranked). On ads, in-app purchases, device support and iOS requirement 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

Modern Thyroid Clinic is free to download; ATA Thyrosim costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

ATA Thyrosim ships an update every 41 months, Modern Thyroid Clinic every 8 days. Both last shipped on November 7, 2026.

Scorecard3 real differences · 4 level
ATA Thyrosim versus Modern Thyroid Clinic: the parameters behind the verdict, then further details
ParameterATA ThyrosimModern Thyroid Clinic
Price$3.99Free — better
Update frequencyEvery 41 monthsEvery 8 days — better
AdsNoNo
In-app purchasesNoNo
Best chart rank#122 — better—
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS15.615.6
Further details — not scored
Size2 MB129 MB
Age rating17+4+
DeveloperAmerican Thyroid AssociationModern Thyroid Clinic

In-app purchases

None

ATA Thyrosim

No in-app purchases

None

Modern Thyroid Clinic

No in-app purchases

Questions

Is ATA Thyrosim free?
ATA Thyrosim costs $3.99, with no in-app purchases.
Is Modern Thyroid Clinic free?
Modern Thyroid Clinic is free to download, with no in-app purchases.
Do ATA Thyrosim or Modern Thyroid Clinic have ads?
Neither ATA Thyrosim nor Modern Thyroid Clinic shows ads.
Which is updated more often, ATA Thyrosim or Modern Thyroid Clinic?
ATA Thyrosim ships an update every 41 months, and Modern Thyroid Clinic every 8 days. Most recently, ATA Thyrosim was updated on November 7, 2026 and Modern Thyroid Clinic on November 7, 2026.

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