# Prime vs boostEM

The clearest difference is update cadence: boostEM at every 3 weeks against Prime's every 4 months. boostEM also leads on monetization model (free vs free with in-app purchases) and review sentiment (100% vs 84%). Prime's advantage is ratings volume (694 vs 9) and rating (4.8 vs 4.6). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Prime holds the better App Store score, 4.8 against 4.6. That said, the two scores are not equally well evidenced: Prime has 694 ratings behind it against 9, so its average is the more settled of the two. Written reviews complicate that: 84% of Prime's written reviews are positive against 100% of boostEM's, so the app with the better star average is not the one people write more warmly about.

Prime ships an update every 4 months, boostEM every 3 weeks. The most recent releases landed on November 6, 2026 and November 1, 2026 respectively.

## The numbers

| Metric | Prime | boostEM |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (694 ratings)](https://appshunter.io/ios/app/prime-pubmed-journals-and-tools/id554157746/reviews)** | [4.6 (9 ratings)](https://appshunter.io/ios/app/boostem/id991962466/reviews) |
| Number of ratings | **694** | 9 |
| Positive reviews | 83.8% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 weeks** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 9 MB | 20 MB |
| Requires iOS | 15.0 | **7.1** |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad, iPod |
| Age rating | 17+ | 17+ |
| Developer | [Unbound Medicine, Inc.](https://appshunter.io/developer/300420400) | [Dirkes Medical, PLLC](https://appshunter.io/developer/1668683062) |

## What reviewers say

### Prime

[App page](https://appshunter.io/ios/app/prime-pubmed-journals-and-tools/id554157746)

Access up-to-date journal citations and abstracts from the complete PubMed database. Perform powerful searches, link to full-text articles, and utilize exclusive tools for visual exploration of research relationships and personalized discovery.

**Highlights:** 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

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 👍 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

**What reviewers complain about**

- 🐛 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

**Reported bugs**

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

**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)


### boostEM

[App page](https://appshunter.io/ios/app/boostem/id991962466)

A medical calculator for emergency physicians, offering over 60 clinical decision rules and rapid medication doses. Includes tools like a pupillometer and visual acuity chart, functioning offline without ads.

**Highlights:** 60+ clinical decision rule calculators, Rapid medication doses, Pupillometer, Estimated gestational age calculator, Visual acuity chart, Offline functionality

**In-app purchases:** none


## Frequently asked questions

### Is Prime free?

Prime is free to download, with no in-app purchases.

### Is boostEM free?

boostEM is free to download, with no in-app purchases.

### Which has better reviews, Prime or boostEM?

Prime is rated higher. Prime averages 4.8 out of 5 from 694 ratings, while boostEM averages 4.6 from 9 ratings.

### Do Prime or boostEM have ads?

Neither Prime nor boostEM shows ads.

### Which is updated more often, Prime or boostEM?

Prime ships an update every 4 months, and boostEM every 3 weeks. Most recently, Prime was updated on November 6, 2026 and boostEM on November 1, 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.*