Comparison

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.

Head to head
About

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.

Highlights
  • 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
Features
Read full description

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.

About

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.

Highlights
  • Surgical education platform
  • High-yield educational topics
  • Interviews with field leaders
  • Timely and relevant content
  • Engaging learning experience
Read full description

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

REDCap Mobile App2 screens
Behind the Knife4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard4 real differences · 6 level
REDCap Mobile App versus Behind the Knife: the parameters behind the verdict, then further details
ParameterREDCap Mobile AppBehind the Knife
PriceFreeFree
Rating4.5 (4 ratings) — better4.0 (19 ratings)
Positive reviews25.0% of reviews58.3% of reviews — better
Number of ratings419 — better
Update frequencyEvery 3 weeks — betterEvery 5 weeks
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS11.0 — better15.0
Further details — not scored
Size26 MB168 MB
Age rating4+17+
DeveloperVanderbilt University Medical CenterBehind the Knife

Customer experience

REDCap Mobile App

All ratings4 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews4 reviews
Positive25.0%
Neutral25.0%
Negative50.0%

Behind the Knife

All ratings19 ratings
Positive73.7%
Neutral5.3%
Negative21.1%
Written reviews12 reviews
Positive58.3%
Neutral8.3%
Negative33.3%

In-app purchases

None

REDCap Mobile App

No in-app purchases

None

Behind the Knife

No in-app purchases

Questions

Is REDCap Mobile App free?
REDCap Mobile App is free to download, with no in-app purchases.
Is Behind the Knife free?
Behind the Knife is free to download, with no in-app purchases.
Which has better reviews, REDCap Mobile App or Behind the Knife?
REDCap Mobile App is rated higher. REDCap Mobile App averages 4.5 out of 5 from 4 ratings, while Behind the Knife averages 4.0 from 19 ratings.
Do REDCap Mobile App or Behind the Knife have ads?
Neither REDCap Mobile App nor Behind the Knife shows ads.
Which is updated more often, REDCap Mobile App or Behind the Knife?
REDCap Mobile App ships an update every 3 weeks, and Behind the Knife every 5 weeks. Most recently, REDCap Mobile App was updated on September 23, 2026 and Behind the Knife on September 19, 2026.

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