# Guide to Diagnostic Tests vs Davis Lab and Diagnostic Tests

The clearest difference is rating: Davis Lab and Diagnostic Tests at 5.0 against Guide to Diagnostic Tests's 4.5. Guide to Diagnostic Tests's advantage is ratings volume (36 vs 2). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Guide to Diagnostic Tests sells 1 one-off in-app purchase and Davis Lab and Diagnostic Tests sells 1 in-app purchase, starting at $38.99 per year. Whichever you choose, the download price is not the number that matters.

Davis Lab and Diagnostic Tests holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: Guide to Diagnostic Tests has 36 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, Davis Lab and Diagnostic Tests every 13 months. The most recent releases landed on November 8, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Guide to Diagnostic Tests | Davis Lab and Diagnostic Tests |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (36 ratings)](https://appshunter.io/ios/app/guide-to-diagnostic-tests/id910130424/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/davis-lab-and-diagnostic-tests/id1605906059/reviews)** |
| Number of ratings | **36** | 2 |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 9 months** | Every 13 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 10 MB | 474 MB |
| Requires iOS | **15.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 17+ |
| Developer | [Unbound Medicine, Inc.](https://appshunter.io/developer/300420400) | [Atmosphere Apps, Inc.](https://appshunter.io/developer/334077424) |

## 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 |


### Davis Lab and Diagnostic Tests

[App page](https://appshunter.io/ios/app/davis-lab-and-diagnostic-tests/id1605906059)

This medical reference app provides comprehensive information on lab and diagnostic tests. It helps users understand test procedures, interpret results, and offer quality patient care with detailed nursing implications, common uses, and interfering factors.

**Highlights:** Alphabetical listing of tests, Searchable by abbreviation, synonym, disease, Potential Nursing Problems tables, Common Use explanations, Pre-test, intra-test, post-test coverage, Patient safety and teaching information, Reference ranges in conventional and SI units

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Annual Subscription | $38.99 | 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 Davis Lab and Diagnostic Tests free?

Davis Lab and Diagnostic Tests is free to download, with in-app purchases available.

### Which has better reviews, Guide to Diagnostic Tests or Davis Lab and Diagnostic Tests?

Davis Lab and Diagnostic Tests is rated higher. Guide to Diagnostic Tests averages 4.5 out of 5 from 36 ratings, while Davis Lab and Diagnostic Tests averages 5.0 from 2 ratings.

### Do Guide to Diagnostic Tests or Davis Lab and Diagnostic Tests have ads?

Neither Guide to Diagnostic Tests nor Davis Lab and Diagnostic Tests shows ads.

### Which is updated more often, Guide to Diagnostic Tests or Davis Lab and Diagnostic Tests?

Guide to Diagnostic Tests ships an update every 9 months, and Davis Lab and Diagnostic Tests every 13 months. Most recently, Guide to Diagnostic Tests was updated on November 8, 2026 and Davis Lab and Diagnostic Tests on November 3, 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.*