# Guide to Diagnostic Tests vs ECG Interpretation

The clearest difference is ads: Guide to Diagnostic Tests at none against ECG Interpretation's shown. Guide to Diagnostic Tests also leads on ratings volume (35 vs 2). ECG Interpretation's advantage is rating (5.0 vs 4.6) and iOS requirement (13.0 vs 15.0). On price, update cadence, in-app purchases and monetization model there is nothing between them.

Both are free to download. Guide to Diagnostic Tests sells 1 one-off in-app purchase and ECG Interpretation sells 1 in-app purchase, starting at $29.99 per year. Whichever you choose, the download price is not the number that matters.

ECG Interpretation holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Guide to Diagnostic Tests has 35 ratings behind it against 2, so its average is the more settled of the two.

Guide to Diagnostic Tests ships an update every 9 months, ECG Interpretation every 5 months. The most recent releases landed on October 27, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Guide to Diagnostic Tests | ECG Interpretation |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (35 ratings)](https://appshunter.io/ios/app/guide-to-diagnostic-tests/id910130424/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/ecg-interpretation-pkt-guide/id1633603649/reviews)** |
| Number of ratings | **35** | 2 |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 9 months | **Every 5 months** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 10 MB | 46 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 17+ |
| Developer | [Unbound Medicine, Inc.](https://appshunter.io/developer/300420400) | [Skyscape Medpresso Inc](https://appshunter.io/developer/818609416) |

## What reviewers say

### Guide to Diagnostic Tests

[App page](https://appshunter.io/ios/app/guide-to-diagnostic-tests/id910130424)

Access evidence-based information on over 450 diagnostic tests, including lab work, imaging, and therapeutic monitoring. This resource helps healthcare professionals quickly find answers to common questions about test selection, interpretation, and patient preparation.

**Highlights:** 450+ diagnostic tests, Evidence-based recommendations, Algorithms, tables, and charts, PubMed links, Custom notes and highlighting, Full-text search, Favorites for bookmarking

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pocket Guide to Diagnostic Tests | $54.99 | one-time |


### ECG Interpretation

[App page](https://appshunter.io/ios/app/ecg-interpretation-pkt-guide/id1633603649)

This pocket guide offers essential skills for ECG interpretation, rhythm strip analysis, and arrhythmia treatment. It features helpful charts, illustrations, and definitions for students and new nurses. Access content offline and use smart search for quick information retrieval.

**Highlights:** ECG interpretation and rhythm strip analysis, Arrhythmia identification and treatment, Helpful charts, illustrations, and definitions, Offline content access, SmartSearch technology, Practice Q&A and ACLS algorithms

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ECG Interpret. PktGuide 1Y Sub | $29.99 | per year |


## Frequently asked questions

### Is Guide to Diagnostic Tests free?

Guide to Diagnostic Tests is free to download, with in-app purchases available.

### Is ECG Interpretation free?

ECG Interpretation is free to download, with in-app purchases available.

### Which has better reviews, Guide to Diagnostic Tests or ECG Interpretation?

ECG Interpretation is rated higher. Guide to Diagnostic Tests averages 4.6 out of 5 from 35 ratings, while ECG Interpretation averages 5.0 from 2 ratings.

### Do Guide to Diagnostic Tests or ECG Interpretation have ads?

ECG Interpretation shows ads; Guide to Diagnostic Tests does not.

### Which is updated more often, Guide to Diagnostic Tests or ECG Interpretation?

Guide to Diagnostic Tests ships an update every 9 months, and ECG Interpretation every 5 months. Most recently, Guide to Diagnostic Tests was updated on October 27, 2026 and ECG Interpretation on October 30, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*