# Prime: PubMed Journals & Tools — Includes Grapherence® Access

> PubMed journal citations, abstracts, and advanced research tools. (iPhone/iPad app by Unbound Medicine, Inc..)

- Source: https://appshunter.io/ios/app/prime-pubmed-journals-and-tools/id554157746 (this page in markdown: same URL + `.md`)
- Developer: [Unbound Medicine, Inc.](https://appshunter.io/developer/300420400)
- Category: Medical, Productivity
- Price: Free
- Rating: 4.80/5 from 690 App Store ratings · 159 written reviews indexed
- Age rating: 17+
- Requires: iOS 14.0 · 9 MB
- Languages: American English
- Released: 2012-09-10
- Data updated: 2026-08-14
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/prime-pubmed-journals-and-tools/id554157746/reviews.md

## What is Prime?

The free Prime app connects you to the most up-to-date journal citations and abstracts from the complete PubMed database. In addition to the ability to perform powerful searches and link to the publisher’s full text articles, Prime also provides a number of exclusive tools not available anywhere else creating a one-of-a-kind user experience.

PRIME FEATURES
- Search: Perform evidence-based searches by keyword, author, or journal then link to full text articles. 
- Organize: Bookmark and Tag important articles and searches to quickly return to them later
- Share: Share articles directly from the app via Email, Twitter, Facebook, SMS, Dropbox, and more

EXCLUSIVE TOOLS 
- Grapherence®: Unbound’s unique search option allows you to visually explore the influence and interrelationships among journal articles
- For You: Discover new articles in a feed designed specifically for you based on how you use the app
- Browse:  Select specific journals you want to follow and receive alerts when new articles are published

WHAT IS GRAPHERENCE?
Grapherence® is Unbound’s interactive search that graphically represents the influence and interrelationships among journal articles. Tap the Grapherence button within a citation and instantly see how that article is related to others. Using this exclusive feature the researcher quickly uncovers difficult to find entries, determines overall significance, identifies clusters of thought, and locates seminal articles.   

ABOUT UNBOUND MEDICINE
With 50+ premium apps available, Unbound Medicine combines powerful software with best-selling content to deliver clinical answers wherever you need them.  Top-selling apps include Johns Hopkins Antibiotic (ABX) Guide, Davis’s Drug Guide, 5-Minute Clinical Consult, Harriet Lane Handbook, The Washington Manual, Nursing Central™, and Diagnosaurus DDx.

## Key features

- PubMed database access
- Keyword, author, journal search
- Link to full-text articles
- Bookmark and tag articles
- Share articles via multiple platforms
- Grapherence visual search
- Personalized article feed

## What do users think of Prime?

Overall sentiment: positive

**Pros**

- 👍 Great app for resources and information
- 🚀 Quick and easy access to PubMed database
- 🔍 Useful for research and staying up-to-date
- 💡 Helpful grapherence feature to track citations
- 👍 User-friendly interface and workflow

**Cons**

- 🐛 Occasional crashes or glitches
- 📱 Limited functionality on iPad (no PDF saving/sharing)
- 🔍 Difficulty performing complex searches
- 💾 No way to save or manage PDFs within the app

**Commonly reported bugs**

- Abstracts cut off and unable to scroll
- Crashes on certain devices (iPad 3, iOS 8.4)
- Duplicate papers appearing in reading lists

**Most requested features**

- Ability to open PDFs in external apps
- Option to delete irrelevant items from saved lists
- Faster article loading times
- Integration with Dropbox or other cloud storage
- Advanced search functionality (e.g., author + abstract)

## Recent user reviews (10 of 159)

All indexed reviews: https://appshunter.io/ios/app/prime-pubmed-journals-and-tools/id554157746/reviews.md

### 5/5 — Excellence

*2026-06-11*

Excellente application Brillant !! Useful handy tool for daily use!

**Developer response:** Thank you for the kind review!

### 5/5 — Prof. Dr (MD, PhD)

*2026-04-02*

Useful & Pertinent

**Developer response:** Hello and thank you for your 5-Star rating of our Prime PubMed app - we're happy to hear you're finding it useful!

### 5/5 — GREAT APP

*2025-11-15*

This app is great for resources and to have further information!

**Developer response:** We are very happy to hear you're enjoying our Prime PubMed app, especially for finding the most up-to-date information across many resources. Thank you for sharing your experience!

### 5/5 — Very helpful

*2025-03-13*

It was difficult to search individually the required articles and here it has been made easily available with full magazine freely available.

**Developer response:** Thank you very much for taking the time to share your thoughts about Prime PubMed! We love hearing that it's making things easier for you!

### 5/5 — Super schnell

*2024-10-13*

Schnelle Artikelsuche. Gute Exportfunktion. Eigene Quellen können hinzugefügt werden. Bisher sehr gut.

**Developer response:** We appreciate your feedback and especially that you're finding the tools within Prime so useful.  Thank you again for your review! Danke!

### 5/5 — Só falta uma coisa

*2024-09-30*

Excelente aplicativo. Poderia ser melhor ainda se permitisse salvar ou enviar por e-mail os textos integrais acessados. Isso pode ser feito nos abstracts, por que não nos pdf?

**Developer response:** Hello and thank you for your 5-Star review. We also appreciate your feedback and suggestion.  Once you click on one of your search results, you'll find a series of tools at the top of the page, right above the blue heading.  The first tool allows you to share your results via email and to share via social media. You can also download a PDF of your results (depending on the subscription requirements to the Journal). We hope this information helps! Our support team is here to assist if you need further guidance on downloading articles: support@unboundmedicine.com or 610-627-9090 (M-F, 9-5 EST)

### 5/5 — Best App On My Phone

*2024-03-18*

Kind of like having the Library of Alexandria (of health) available at the touch of a fingertip on your phone. I spent years searching pubmed… but this app has made my amateur health fact-finding adventures more enjoyable, productive, and fast. I can go and do things in four or five or six other apps, and then come back to this app, and it still is in the exact same place where I left it, whether a search, a paper pdf, or whatever. My Apple iPhone Podcast App doesn’t even do that! A+

**Developer response:** Thank you so much for your glowing review! We're absolutely thrilled to hear that our app has become your go-to resource for health information, making your fact-finding adventures not only more enjoyable but also more productive and efficient. It's fantastic to know that our app's stability and user-friendly design, especially in retaining your place across sessions, stands out to you—even compared to other apps on your device. If there's anything more we can do to support your journey or enhance your experience, please don't hesitate to reach out. Your A+ rating means the world to us, and we look forward to continuing to serve as your trusted health information companion.

### 4/5 — Great

*2024-01-13, version 2.12*

Great

### 5/5 — Great research tool!

*2023-12-11*

I have enjoyed using Prime for at least seven years now. One of its most useful options is its grapherence program.  It allows me to look at the abstracts of articles upon which the title I am reading are based AND any articles that have subsequently referred referred to that same title.  I can also get some idea as to the influence of a given reference by the number of articles that refer back to it.

**Developer response:** Edit, 1/3/24.  Thank you for taking the time to share your experience. We're incredibly grateful for your continued support over the last seven years and are thrilled to hear how much you've enjoyed using Prime, especially the grapherence feature. Your detailed feedback is not only appreciated but also instrumental in helping us understand what features our users value the most. We are committed to continually enhancing our app to meet the needs of our dedicated users like you.

### 5/5 — Fabulous app.

*2023-11-07*

Everything you need tailored to your areas of specialization!

**Developer response:** Thank you for sharing your 5 star review!

## Frequently asked questions about Prime

### What does the Prime: PubMed Journals & Tools app do?

This app provides access to the complete PubMed database, offering up-to-date journal citations and abstracts. It allows users to perform advanced searches, link to full-text articles, and utilize exclusive tools like Grapherence for visual research exploration and a personalized 'For You' feed.

### What are the key features of this app?

Key features include powerful searching by keyword, author, or journal, with direct links to full-text articles. Users can organize research by bookmarking and tagging important articles and searches. The app also offers exclusive tools such as Grapherence for visually exploring article interrelationships and a personalized feed for discovering new research.

### Is this app free to use?

The Prime app is free to download and use, providing access to the PubMed database and its core features. While the app itself is free, it does mention in-app purchases, suggesting that some advanced tools or content might be available for an additional cost.

### What is Grapherence and how does it work?

Grapherence is an exclusive interactive search tool that graphically represents the influence and interrelationships among journal articles. By tapping the Grapherence button within a citation, users can instantly see how an article is connected to others, helping to uncover difficult-to-find entries, determine significance, and identify clusters of thought.

### Who would benefit from using this app?

This app is designed for researchers, medical professionals, students, and anyone involved in biomedical or scientific research. It's particularly useful for those who need to quickly find, organize, and analyze journal articles from the PubMed database, especially those who can benefit from visual research tools.

## Version history (last 5 releases)

### 2.18 — 2026-01-29

* Bug fixes and app optimizations for a better user experience. 


If you have any questions or feedback, please reach out to the Unbound Medicine support team.

### 2.17 — 2025-12-23

Updated the app information to be in compliance with the latest regulatory changes.

### 2.16 — 2025-08-14

* Added the ability to "Sort By" Most Recent, Relevance, Pub Date, Journal, Title or Author

If you have any questions or feedback, please reach out to the Unbound Medicine support team.

### 2.15 — 2024-09-11

* Improved performance for faster access to critical medical information. 

If you have any questions or feedback, please reach out to the Unbound Medicine support team.

### 2.14 — 2024-06-12

* New related store 

If you have any questions, please contact Unbound Medicine Support.

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All apps by Unbound Medicine, Inc.: https://appshunter.io/developer/300420400

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-14.*