# ClinicalKey vs TEM Guide

The clearest difference is monetization model: TEM Guide at free against ClinicalKey's subscription. TEM Guide also leads on iOS requirement (12.0 vs 15.0). ClinicalKey's advantage is update cadence (every 5 weeks vs every 7 months) and review sentiment (9% vs 0%). 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.

ClinicalKey ships an update every 5 weeks, TEM Guide every 7 months. Both last shipped on September 14, 2026.

## The numbers

| Metric | ClinicalKey | TEM Guide |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | **8.8% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 7 months |
| Monetization | Subscription | **Free** |
| Size | 55 MB | 17 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 17+ |
| Developer | [Elsevier Inc.](https://appshunter.io/developer/367031326) | [Josh Case](https://appshunter.io/developer/1142529891) |

## What reviewers say

### ClinicalKey

[App page](https://appshunter.io/ios/app/clinicalkey/id1041998175)

This app provides medical professionals with instant access to a vast library of clinical knowledge, including synoptic content and in-depth reference materials. It helps users stay updated on medical advancements, confirm diagnoses, and advance their research skills, all while offering CME/MOC/CE credits.

**Highlights:** Access to 30+ medical specialties, Synoptic content for quick answers, Full-text reference books and journals, Mobile-optimized medical calculators, Earn CME/MOC/CE credits, Intuitive search functionality

**In-app purchases:** none

**What reviewers like**

- 📚 High-quality, evidence-based clinical content
- 🎯 Intuitive interface and quick reference format
- 🔍 Similar functionality to website version
- 👍 Browse feature restoration appreciated by users

**What reviewers complain about**

- 🔓 Constant forced logout issues
- 🔐 Institutional login authentication failures
- ⏳ App freezes and perpetual loading screens
- 🚫 Missing textbook access in app vs website
- 📵 Frequent crashes and force closures

**Reported bugs**

- App stuck on loading screen after initial login
- Forced logout when closing or minimizing app
- Institutional login not working despite web access
- App crashes during search queries
- OpenAthens authentication failures

**Requested features**

- PDF download capability within the app
- Favorite/bookmark textbooks and articles
- Landscape mode support for iPad
- Find-on-page text search function
- Automatic session persistence and page memory


### TEM Guide

[App page](https://appshunter.io/ios/app/tem-guide/id1396817192)

This app provides a step-by-step guide for optimizing blood product selection and administration in TEM-directed transfusions. It aims to simplify and standardize the transfusion process for improved patient outcomes.

**Highlights:** Optimized blood product selection, Step-wise administration guide, Standardized transfusion process, Improved patient outcomes, Accessible transfusion guidelines

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

**In-app purchases:** none


## Frequently asked questions

### Is ClinicalKey free?

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

### Is TEM Guide free?

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

### Do ClinicalKey or TEM Guide have ads?

Neither ClinicalKey nor TEM Guide shows ads.

### Which is updated more often, ClinicalKey or TEM Guide?

ClinicalKey ships an update every 5 weeks, and TEM Guide every 7 months. Most recently, ClinicalKey was updated on September 14, 2026 and TEM Guide on September 14, 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.*