# ePRO by Mobile4D vs DFengage

The clearest difference is update cadence: ePRO by Mobile4D at fortnightly against DFengage's every 2 months. ePRO by Mobile4D also leads on iOS requirement (12.0 vs 14.4). On price, ads, in-app purchases and device support there is nothing between them.

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

ePRO by Mobile4D ships an update fortnightly, DFengage every 2 months. The most recent releases landed on October 7, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | ePRO by Mobile4D | DFengage |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/dfengage/id6468891878/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 2 months |
| Monetization | — | Free |
| Size | 63 MB | 41 MB |
| Requires iOS | **12.0** | 14.4 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Universitat Bremen](https://appshunter.io/developer/1236712029) | [datafax](https://appshunter.io/developer/1353928449) |

## What reviewers say

### ePRO by Mobile4D

[App page](https://appshunter.io/ios/app/epro-by-mobile4d/id1616214804)

**In-app purchases:** none


### DFengage

[App page](https://appshunter.io/ios/app/dfengage/id6468891878)

This app streamlines electronic patient-reported outcomes (ePRO) collection for clinical research. It allows participants to easily report symptoms, complete surveys, and manage study activities from their mobile devices, both online and offline, enhancing data accuracy and participant retention.

**Highlights:** Effortless data collection (symptoms, outcomes, diaries, surveys), Online and offline data capture, Participant reminders for timely data, Multilingual support and personalized timing, Secure and compliant data capture, Integrated with DFdiscover system

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is ePRO by Mobile4D free?

ePRO by Mobile4D is free to download, with no in-app purchases.

### Is DFengage free?

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

### Do ePRO by Mobile4D or DFengage have ads?

Neither ePRO by Mobile4D nor DFengage shows ads.

### Which is updated more often, ePRO by Mobile4D or DFengage?

ePRO by Mobile4D ships an update fortnightly, and DFengage every 2 months. Most recently, ePRO by Mobile4D was updated on October 7, 2026 and DFengage on September 29, 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.*