# Facter.Io vs ResearchApp

The clearest difference is rating: Facter.Io at 3.0 against ResearchApp's 2.0. ResearchApp's advantage is update cadence (fortnightly vs every 2 months) and iOS requirement (10.0 vs 13.0). On price, ratings volume, ads and in-app purchases there is nothing between them.

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

Facter.Io holds the better App Store score, 3.0 against 2.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

Facter.Io ships an update every 2 months, ResearchApp fortnightly. The most recent releases landed on October 21, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Facter.Io | ResearchApp |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (1 ratings)](https://appshunter.io/ios/app/facterio-science-journals/id1202263687/reviews)** | [2.0 (1 ratings)](https://appshunter.io/ios/app/researchapp-join-a-study/id1494456384/reviews) |
| Number of ratings | 1 | 1 |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Fortnightly** |
| Monetization | Free | Free |
| Size | 29 MB | 172 MB |
| Requires iOS | 13.0 | **10.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [KneeSearch GmbH](https://appshunter.io/developer/1306668163) | [Healthbit LTD](https://appshunter.io/developer/940551025) |

## What reviewers say

### Facter.Io

[App page](https://appshunter.io/ios/app/facterio-science-journals/id1202263687)

Access thousands of medical and scientific research papers, discover trending publications, and stay updated on the latest discoveries. Connect with like-minded scholars and build a personalized feed of your interests.

**Highlights:** Unlimited access to research papers, Personalized dashboard, Keyword-centric search, Full-text search, Bookmark for later reading, Notifications for updates, Connect with scholars

**Features:** macOS Compatibility

**In-app purchases:** none


### ResearchApp

[App page](https://appshunter.io/ios/app/researchapp-join-a-study/id1494456384)

Participate in medical research studies by entering a unique token code. Track your health information and share data with research teams, including HealthKit integration. This app facilitates the discovery of new medicines and improved health outcomes.

**Highlights:** Join consented research studies, Enter unique token codes, Track health questionnaires, Connect to HealthKit, Share data with research teams, Facilitates medicine discovery

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Facter.Io free?

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

### Is ResearchApp free?

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

### Which has better reviews, Facter.Io or ResearchApp?

Facter.Io is rated higher. Facter.Io averages 3.0 out of 5 from 1 ratings, while ResearchApp averages 2.0 from 1 ratings.

### Do Facter.Io or ResearchApp have ads?

Neither Facter.Io nor ResearchApp shows ads.

### Which is updated more often, Facter.Io or ResearchApp?

Facter.Io ships an update every 2 months, and ResearchApp fortnightly. Most recently, Facter.Io was updated on October 21, 2026 and ResearchApp 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.*