# ATA Calculator vs Clinical Practice Guidelines

The clearest difference is price: Clinical Practice Guidelines at Free against ATA Calculator's $2.99. Clinical Practice Guidelines also leads on rating (4.8 vs 3.0) and ratings volume (448 vs 1). On update cadence, ads, in-app purchases and device support there is nothing between them.

Clinical Practice Guidelines is free to download; ATA Calculator costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Clinical Practice Guidelines holds the better App Store score, 4.8 against 3.0. That said, the two scores are not equally well evidenced: Clinical Practice Guidelines has 448 ratings behind it against 1, so its average is the more settled of the two.

ATA Calculator ships an update every 9 months, Clinical Practice Guidelines every 6 months. The most recent releases landed on October 3, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | ATA Calculator | Clinical Practice Guidelines |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | [3.0 (1 ratings)](https://appshunter.io/ios/app/ata-calculator/id890053714/reviews) | **[4.8 (448 ratings)](https://appshunter.io/ios/app/clinical-practice-guidelines/id1079272170/reviews)** |
| Number of ratings | 1 | **448** |
| Positive reviews | — | 66.7% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 6 months** |
| Monetization | Paid | **Free** |
| Size | 2 MB | 113 MB |
| Requires iOS | **11.0** | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 12+ |
| Developer | [American Thyroid Association](https://appshunter.io/developer/890053717) | [The Endocrine Society](https://appshunter.io/developer/438308415) |

## What reviewers say

### ATA Calculator

[App page](https://appshunter.io/ios/app/ata-calculator/id890053714)

This medical app provides thyroid nodule calculators to assist healthcare providers in guiding treatment decisions for thyroid disease and cancer. It offers recommendations based on current evidence and expert opinion, but emphasizes that it is a tool to supplement, not replace, physician judgment.

**Highlights:** Thyroid nodule calculators, Guidance for thyroid disease and cancer, Evidence-based recommendations, Supports clinical judgment, Developed by American Thyroid Association

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

**In-app purchases:** none


### Clinical Practice Guidelines

[App page](https://appshunter.io/ios/app/clinical-practice-guidelines/id1079272170)

Access endocrine society clinical practice guidelines directly on your device. Utilize interactive tools like risk calculators and diagnostic algorithms. Save important information, take notes, and share resources with colleagues.

**Highlights:** Point-of-care guideline access, Interactive risk calculators, Diagnosis and treatment algorithms, Medication charts, Bookmark and note-taking, Shareable PDFs

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is ATA Calculator free?

ATA Calculator costs $2.99, with no in-app purchases.

### Is Clinical Practice Guidelines free?

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

### Which has better reviews, ATA Calculator or Clinical Practice Guidelines?

Clinical Practice Guidelines is rated higher. ATA Calculator averages 3.0 out of 5 from 1 ratings, while Clinical Practice Guidelines averages 4.8 from 448 ratings.

### Do ATA Calculator or Clinical Practice Guidelines have ads?

Neither ATA Calculator nor Clinical Practice Guidelines shows ads.

### Which is updated more often, ATA Calculator or Clinical Practice Guidelines?

ATA Calculator ships an update every 9 months, and Clinical Practice Guidelines every 6 months. Most recently, ATA Calculator was updated on October 3, 2026 and Clinical Practice Guidelines on October 14, 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.*