# CANTAB vs OpenEvidence

The clearest difference is rating: OpenEvidence at 4.9 against CANTAB's 2.5. OpenEvidence also leads on update cadence (weekly vs every 3 months) and ratings volume (12K vs 2). On price, ads, in-app purchases and monetization model there is nothing between them.

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

OpenEvidence holds the better App Store score, 4.9 against 2.5. That said, the two scores are not equally well evidenced: OpenEvidence has 12K ratings behind it against 2, so its average is the more settled of the two.

CANTAB ships an update every 3 months, OpenEvidence weekly. The most recent releases landed on October 20, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | CANTAB | OpenEvidence |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.5 (2 ratings)](https://appshunter.io/ios/app/cantab/id1547171492/reviews) | **[4.9 (12K ratings)](https://appshunter.io/ios/app/openevidence/id6612007783/reviews)** |
| Number of ratings | 2 | **12K** |
| Positive reviews | — | 81.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Weekly** |
| Monetization | Free | Free |
| Best chart rank | — | **#37** |
| Size | 72 MB | 95 MB |
| Requires iOS | 17.0 | **15.1** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 17+ | +17 |
| Developer | [Cambridge Cognition Limited](https://appshunter.io/developer/496596292) | [OpenEvidence Inc.](https://appshunter.io/developer/1761260627) |

## What reviewers say

### CANTAB

[App page](https://appshunter.io/ios/app/cantab/id1547171492)

This application is exclusively for registered study participants. It allows users to check in regularly to engage with research studies and monitor their personal progress.

**Highlights:** Study participation, Regular check-ins, Progress monitoring, Study updates

**In-app purchases:** none


### OpenEvidence

[App page](https://appshunter.io/ios/app/openevidence/id6612007783)

**Currently charting:** #37 Top Free · Medical (US App Store)

This app provides healthcare professionals with evidence-based clinical decision support and medical information. It acts as a search engine, sourcing answers from peer-reviewed literature and leading medical organizations to aid in high-stakes medical decisions at the point of care.

**Highlights:** Clinical decision support, Medical search engine, Sourced from peer-reviewed literature, FDA and CDC data integration, Partnerships with leading medical journals, Verified healthcare professional access

**Features:** Siri integration

**In-app purchases:** none

**What reviewers like**

- 🚀 Accurate and concise answers
- 💡 Provides references and sources
- 👍 Helpful for clinical practice
- 🚀 Efficient search and retrieval
- 👍 Invaluable quick reference tool

**What reviewers complain about**

- 🐛 App not working in latest update
- ⚠️ Requires specific prompts for complete information

**Reported bugs**

- App not working in latest update

**Requested features**

- Availability on MacBook
- Integration with clinical workflows and EMRs


## Frequently asked questions

### Is CANTAB free?

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

### Is OpenEvidence free?

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

### Which has better reviews, CANTAB or OpenEvidence?

OpenEvidence is rated higher. CANTAB averages 2.5 out of 5 from 2 ratings, while OpenEvidence averages 4.9 from 12K ratings.

### Do CANTAB or OpenEvidence have ads?

Neither CANTAB nor OpenEvidence shows ads.

### Which is updated more often, CANTAB or OpenEvidence?

CANTAB ships an update every 3 months, and OpenEvidence weekly. Most recently, CANTAB was updated on October 20, 2026 and OpenEvidence on October 31, 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.*