# Avius Surveys vs VDFU Events

The clearest difference is update cadence: Avius Surveys at every 3 weeks against VDFU Events's every 3 months. Avius Surveys also leads on iOS requirement (15.0 vs 17.0). 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.

Avius Surveys ships an update every 3 weeks, VDFU Events every 3 months. The most recent releases landed on November 1, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | Avius Surveys | VDFU Events |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (4 ratings)](https://appshunter.io/ios/app/avius-surveys/id702233192/reviews)** | — |
| Number of ratings | **4** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 3 months |
| Monetization | Free | — |
| Size | 9 MB | 60 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Avius Ltd](https://appshunter.io/developer/702233195) | [VDFU e.V.](https://appshunter.io/developer/1720430190) |

## What reviewers say

### Avius Surveys

[App page](https://appshunter.io/ios/app/avius-surveys/id702233192)

Gather real-time feedback from customers and employees to enhance satisfaction and loyalty. Receive instant alerts for issues and make data-driven decisions with comprehensive reporting.

**Highlights:** Real-time customer satisfaction measurement, Instant issue alerts, Multilingual survey support, Real-time reporting and comparison, Data-driven decision making, Customizable survey design

**Features:** Vision Pro support

**In-app purchases:** none


### VDFU Events

[App page](https://appshunter.io/ios/app/vdfu-events/id6474039659)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Avius Surveys free?

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

### Is VDFU Events free?

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

### Do Avius Surveys or VDFU Events have ads?

Neither Avius Surveys nor VDFU Events shows ads.

### Which is updated more often, Avius Surveys or VDFU Events?

Avius Surveys ships an update every 3 weeks, and VDFU Events every 3 months. Most recently, Avius Surveys was updated on November 1, 2026 and VDFU Events on October 27, 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.*