Comparison

ePRO by Mobile4D vs CTCAE 5 Pro

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

ePRO by Mobile4D

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The ePRO app is developed as a student project at the University Bremen in Germany in cooperation with a project at the Mahidol University in Thailand. Our system’s purpose is to provide a digital way of creating and sharing surveys with the participant of studies. These studies are conduct by our partners at the Mahidol University and their associates. The app is only designed for answering these surveys by the participants. The researchers use a web dashboard developed by us for creating and administrating the surveys. Therefore, the intended target audience are study participants of the projects at the Mahidol University. Since these studies cover long term developments of different events (without being able to go into too much detail here), they are always started in person with follow-up surveys in subsequent weeks and/or months. These initial in-person meetings are where the participants are provided with the QR code required for logging into their account in the app. The app is not intended for use by the general public outside of these studies. The basis for collecting the survey answers is covered by standard agreements between the researchers and the participants as common for academic studies.

About

CTCAE 5 Pro

This app helps review and take notes on CTCAE documents. It offers local data storage for privacy and premium features like version comparison and advanced note-taking with a subscription.

Highlights
  • Streamlined CTCAE Document Access
  • Local data storage for enhanced privacy
  • Version comparison tool
  • Advanced chronological note-taking with hashtags
  • Custom app creation from spreadsheets
  • Flexible backup and archiving (XLSX, CSV)
Features
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CTCAE 5 Pro is designed to assist in the documentation, review, and reference of CTCAE-related information. This app is intended for informational support and is not designed for medical purposes such as diagnosis, clinical decision-making, or treatment recommendations. Users are responsible for verifying all information and making clinical decisions. ::::::::: Standard features (available to all users) :::::: - Streamlined CTCAE Document Access - Easily navigate CTCAE 5.0 documents using an intuitive interface. - Enhanced privacy with local data storage - protect your data by storing it locally instead of relying on cloud services, ensuring privacy and control. ::::::::: Premium Features (available with subscription) ::::::: - Version Comparison Tool - Easily compare different versions of CTCAE 5.0 and 4.03. - Advanced Notes feature - allows you to record CTCAEs in chronological order. You can also use hashtags and other features to efficiently organize and track notes for important information. - Custom App Creation Feature - Simply import a spreadsheet and convert it into a list app. No programming knowledge is required. - Flexible backup and archiving solution - easily back up and archive data in formats such as XLSX and CSV for versatility and accessibility. - More features are available in the Premium version. Note: With the Premium feature, a minimal number of files are automatically stored in a secure iCloud Drive to resume link information between files. This can be turned off based on user preference.

Screenshots

ePRO by Mobile4D4 screens
CTCAE 5 Pro4 screens

Verdict

The call

The clearest difference is in-app purchases: ePRO by Mobile4D at none against CTCAE 5 Pro's 2. ePRO by Mobile4D also leads on update cadence (fortnightly vs every 5 weeks) and iOS requirement (12.0 vs 15.5). On price, ads and device support 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. CTCAE 5 Pro sells 2 in-app purchases, starting at $1.99 per month. ePRO by Mobile4D asks for nothing beyond the download.

UpkeepUpdate frequency

ePRO by Mobile4D ships an update fortnightly, CTCAE 5 Pro every 5 weeks. The most recent releases landed on October 7, 2026 and October 27, 2026 respectively.

Scorecard3 real differences · 7 level
ePRO by Mobile4D versus CTCAE 5 Pro: the parameters behind the verdict, then further details
ParameterePRO by Mobile4DCTCAE 5 Pro
PriceFreeFree
Rating—4.9 (41 ratings) — better
Positive reviews—0.0% of reviews
Number of ratings—41 — better
Update frequencyFortnightly — betterEvery 5 weeks
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Freemium
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS12.0 — better15.5
Further details — not scored
Size63 MB60 MB
Age rating4+17+
DeveloperUniversitat BremenKoichiro Watanabe

In-app purchases

None

ePRO by Mobile4D

No in-app purchases

2 purchases

CTCAE 5 Pro

Subscriptions2
  • Monthly subscription7 Days trial$1.991 Month
  • Annual subscription7 Days trial$9.991 Year

Questions

Is ePRO by Mobile4D free?
ePRO by Mobile4D is free to download, with no in-app purchases.
Is CTCAE 5 Pro free?
CTCAE 5 Pro is free to download, with in-app purchases available.
Do ePRO by Mobile4D or CTCAE 5 Pro have ads?
Neither ePRO by Mobile4D nor CTCAE 5 Pro shows ads.
Which is updated more often, ePRO by Mobile4D or CTCAE 5 Pro?
ePRO by Mobile4D ships an update fortnightly, and CTCAE 5 Pro every 5 weeks. Most recently, ePRO by Mobile4D was updated on October 7, 2026 and CTCAE 5 Pro on October 27, 2026.

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