REDCap Mobile App vs Behind the Knife
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
REDCap Mobile App
Collect data offline for your REDCap projects. Download your project securely, gather information on your device, and sync it back to the server. Supports text, photos, videos, signatures, and audio.
- Offline data collection
- Secure project download
- Multi-user interface
- Support for photos, videos, audio, and signatures
- Activity logging for audit purposes
- Participant data entry restriction
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Collect your REDCap data in an offline environment in the REDCap mobile app, and then sync your data back to your project on a REDCap server. REDCap is a web application, which requires the Internet to be used, but the REDCap mobile app allows for offline data collection for your REDCap projects. You can create your project in REDCap, securely download your project to the REDCap mobile app on your iPad or iPhone, collect data on the device (with or without an Internet connection), and then securely send your data back to your project on a REDCap server. Features • Multi-user interface with secure login that allows each user account to collect data for multiple REDCap projects in the app. • In addition to text and structured data, you can store and transmit photos, videos, signatures, and audio to REDCap. • When collecting data in the app from a participant, for security purposes you can easily restrict access to the rest of the app as they enter their data. • All user activity in the app is logged for audit purposes. The full logging history can be sent to your project on the REDCap server. Who is the REDCap Mobile App for? In order to use the REDCap Mobile App, REDCap must be installed on your institution’s server and must be at version 6.5.0 or higher. The REDCap Mobile App is designed to fit the following scenarios: • A REDCap project that needs data to be collected without any Internet access available. • A REDCap project that needs data to be collected with sporadic Internet access. If mobile devices are desired for use in REDCap data collection, and if WiFi or cellular Internet is amply available, then it is suggested to use the REDCap mobile web view that is available on the REDCap server, which provides real-time access to data. What is REDCap? REDCap is a mature, secure web application for building and managing online surveys and databases, and it is used by hundreds of thousands of users around the world (http://projectredcap.org). Before setting up a REDCap project in the app, you must already have a user account on a REDCap server hosted by a participating REDCap partner institution. If you belong to an institution that does not have REDCap, please visit http://projectredcap.org/participate.php to learn how to get REDCap where you are. What are some limitations of this app? The REDCap mobile app runs in conjunction with the REDCap web application software. You must already have a REDCap user account and project on a REDCap server before being able to download the project to the app. The app cannot function or stand independently without a REDCap server.
Behind the Knife
This platform offers surgical education with high-yield topics and interviews with field leaders. It provides timely, relevant, and engaging content to help users succeed in their medical studies and careers.
- Surgical education platform
- High-yield educational topics
- Interviews with field leaders
- Timely and relevant content
- Engaging learning experience
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Behind the Knife is the world’s #1 surgical education platform. From high-yield educational topics to interviews with leaders in the field, Behind the Knife delivers the information you need to know. Enjoy timely, relevant, and engaging content designed to help you DOMINATE THE DAY!
Screenshots
Verdict
The clearest difference is rating: REDCap Mobile App at 4.5 against Behind the Knife's 4.0. REDCap Mobile App also leads on iOS requirement (11.0 vs 15.0). Behind the Knife's advantage is review sentiment (58% vs 25%) and ratings volume (19 vs 4). On price, update cadence, ads and in-app purchases there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
REDCap Mobile App holds the better App Store score, 4.5 against 4.0. Both are backed by a comparable volume of ratings — 4 and 19 respectively. Written reviews complicate that: 25% of REDCap Mobile App's written reviews are positive against 58% of Behind the Knife's, so the app with the better star average is not the one people write more warmly about.
REDCap Mobile App ships an update every 3 weeks, Behind the Knife every 5 weeks. The most recent releases landed on September 23, 2026 and September 19, 2026 respectively.
| Parameter | REDCap Mobile App | Behind the Knife |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (4 ratings) — better | 4.0 (19 ratings) |
| Positive reviews | 25.0% of reviews | 58.3% of reviews — better |
| Number of ratings | 4 | 19 — better |
| Update frequency | Every 3 weeks — better | Every 5 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 11.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 26 MB | 168 MB |
| Age rating | 4+ | 17+ |
| Developer | Vanderbilt University Medical Center | Behind the Knife |
Customer experience
REDCap Mobile App
Behind the Knife
In-app purchases
REDCap Mobile App
No in-app purchases
Behind the Knife
No in-app purchases
Questions
Is REDCap Mobile App free?
Is Behind the Knife free?
Which has better reviews, REDCap Mobile App or Behind the Knife?
Do REDCap Mobile App or Behind the Knife have ads?
Which is updated more often, REDCap Mobile App or Behind the Knife?
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