# RN’s Study Guide vs Davis Lab and Diagnostic Tests

The clearest difference is ads: Davis Lab and Diagnostic Tests at none against RN’s Study Guide's shown. Davis Lab and Diagnostic Tests also leads on rating (5.0 vs 4.8). RN’s Study Guide's advantage is update cadence (every 6 months vs every 13 months) and iOS requirement (13.0 vs 15.6). On price, ratings volume, in-app purchases and monetization model there is nothing between them.

Both are free to download. RN’s Study Guide 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 4.8. Both are backed by a comparable volume of ratings — 4 and 2 respectively.

RN’s Study Guide ships an update every 6 months, Davis Lab and Diagnostic Tests every 13 months. The most recent releases landed on September 18, 2026 and August 24, 2026 respectively.

## The numbers

| Metric | RN’s Study Guide | Davis Lab and Diagnostic Tests |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (4 ratings)](https://appshunter.io/ios/app/rns-study-guide/id1293678818/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/davis-lab-and-diagnostic-tests/id1605906059/reviews)** |
| Number of ratings | **4** | 2 |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 6 months** | Every 13 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 46 MB | 474 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 17+ |
| Developer | [Skyscape Medpresso Inc](https://appshunter.io/developer/818609416) | [Atmosphere Apps, Inc.](https://appshunter.io/developer/334077424) |

## What reviewers say

### RN’s Study Guide

[App page](https://appshunter.io/ios/app/rns-study-guide/id1293678818)

This app condenses essential nursing knowledge into manageable basics for students and professionals. It simplifies complex health problems with practical tips, medical terms, and precautions. Access comprehensive content offline after initial download.

**Highlights:** Condensed nursing knowledge, Simplified health problem explanations, Nursing tips and precautions, Medical terms and anatomy, Offline content access, SmartSearch technology

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| RN’s Study Guide | $29.99 | 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 RN’s Study Guide free?

RN’s Study Guide 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, RN’s Study Guide or Davis Lab and Diagnostic Tests?

Davis Lab and Diagnostic Tests is rated higher. RN’s Study Guide averages 4.8 out of 5 from 4 ratings, while Davis Lab and Diagnostic Tests averages 5.0 from 2 ratings.

### Do RN’s Study Guide or Davis Lab and Diagnostic Tests have ads?

RN’s Study Guide shows ads; Davis Lab and Diagnostic Tests does not.

### Which is updated more often, RN’s Study Guide or Davis Lab and Diagnostic Tests?

RN’s Study Guide ships an update every 6 months, and Davis Lab and Diagnostic Tests every 13 months. Most recently, RN’s Study Guide was updated on September 18, 2026 and Davis Lab and Diagnostic Tests on August 24, 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.*