# Guide to Diagnostic Tests vs Clinical Constellation Bundle

Guide to Diagnostic Tests and Clinical Constellation Bundle both sit at 4.6 stars, but that hides the real split: 67% of Clinical Constellation Bundle's written reviews are positive against 0% of Guide to Diagnostic Tests's. Clinical Constellation Bundle also leads on monetization model (free vs free with in-app purchases) and iOS requirement (10.0 vs 15.0). Guide to Diagnostic Tests's advantage is update cadence (every 9 months vs every 23 months) and ratings volume (35 vs 9). On price, rating, 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 Clinical Constellation Bundle sells 21 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Guide to Diagnostic Tests holds the better App Store score, 4.6 against 4.4. Both are backed by a comparable volume of ratings — 35 and 9 respectively. Written reviews complicate that: 0% of Guide to Diagnostic Tests's written reviews are positive against 67% of Clinical Constellation Bundle's, so the app with the better star average is not the one people write more warmly about.

Guide to Diagnostic Tests ships an update every 9 months, Clinical Constellation Bundle every 23 months. Both last shipped on October 24, 2026.

## The numbers

| Metric | Guide to Diagnostic Tests | Clinical Constellation Bundle |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (35 ratings)](https://appshunter.io/ios/app/guide-to-diagnostic-tests/id910130424/reviews)** | [4.4 (9 ratings)](https://appshunter.io/ios/app/clinical-constellation-bundle/id1396445537/reviews) |
| Number of ratings | **35** | 9 |
| Positive reviews | 0.0% of reviews | **66.7% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 9 months** | Every 23 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 10 MB | 57 MB |
| Requires iOS | 15.0 | **10.0** |
| 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 |


### Clinical Constellation Bundle

[App page](https://appshunter.io/ios/app/clinical-constellation-bundle/id1396445537)

This comprehensive medical resource bundle provides essential information for healthcare professionals and students. Access diagnoses, treatment options, drug information, and clinical guidelines offline, anywhere. Features smart search technology for quick and accurate results.

**Highlights:** 900+ medical conditions, Clinical practice guidelines, Differential diagnosis tool, Drug information guide, Medical calculators, ICD-10-CM codes, Offline access

**Features:** macOS Compatibility

**In-app purchases (21)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ICD10-Clinical Modification 23 | $1.99 | one-time |
| ICD10-Clinical Modification 25 | $1.99 | one-time |
| ICD10-Clinical Modification 24 | $1.99 | one-time |
| Mobile DDx | $4.99 | one-time |
| Skyscape Clinical Calculator+ | $4.99 | one-time |
| Black Book of Primary Care | $9.99 | one-time |
| Current Practice Guideline | $39.99 | one-time |
| Current Practice Guideline 24 | $39.99 | one-time |
| Skyscape Labs™ | $49.99 | one-time |
| DrDrugs DrugGuide Physicians22 | $49.99 | one-time |
| Can DrugGuide-Physicians 2023 | $49.99 | one-time |
| DrDrugs DrugGuide Physicians23 | $49.99 | one-time |
| DrDrugs DrugGuide Physicians25 | $49.99 | one-time |
| DrDrugs DrugGuide Physicians24 | $49.99 | one-time |
| Can DrugGuide-Physicians 2024 | $49.99 | one-time |
| Ferri's Clinical Advisor 23 | $89.99 | one-time |
| Ferri's Clinical Advisor 25 | $89.99 | one-time |
| Ferri's Clinical Advisor 24 | $89.99 | one-time |
| Clinical Constellation 2023 | $169.99 | one-time |
| Clinical Constellation 2024 | $169.99 | one-time |
| Clinical Constellation 2025 | $169.99 | one-time |


## Frequently asked questions

### Is Guide to Diagnostic Tests free?

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

### Is Clinical Constellation Bundle free?

Clinical Constellation Bundle is free to download, with in-app purchases available.

### Which has better reviews, Guide to Diagnostic Tests or Clinical Constellation Bundle?

Guide to Diagnostic Tests is rated higher. Guide to Diagnostic Tests averages 4.6 out of 5 from 35 ratings, while Clinical Constellation Bundle averages 4.4 from 9 ratings.

### Do Guide to Diagnostic Tests or Clinical Constellation Bundle have ads?

Neither Guide to Diagnostic Tests nor Clinical Constellation Bundle shows ads.

### Which is updated more often, Guide to Diagnostic Tests or Clinical Constellation Bundle?

Guide to Diagnostic Tests ships an update every 9 months, and Clinical Constellation Bundle every 23 months. Most recently, Guide to Diagnostic Tests was updated on October 24, 2026 and Clinical Constellation Bundle on October 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.*