# EPIO Research vs Extensor

The clearest difference is update cadence: EPIO Research at every 2 months against Extensor's every 5 months. 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.

EPIO Research ships an update every 2 months, Extensor every 5 months. The most recent releases landed on September 18, 2026 and November 26, 2025 respectively.

## The numbers

| Metric | EPIO Research | Extensor |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 5 months |
| Size | 31 MB | 26 MB |
| Requires iOS | 14.0 | **13.4** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Oslo Universitetssykehus HF](https://appshunter.io/developer/1019156091) | [Extensor Applications LTD](https://appshunter.io/developer/1613206482) |

## What reviewers say

### EPIO Research

[App page](https://appshunter.io/ios/app/epio-research/id1446883754)

**Features:** macOS Compatibility

**In-app purchases:** none


### Extensor

[App page](https://appshunter.io/ios/app/extensor/id1613206480)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is EPIO Research free?

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

### Is Extensor free?

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

### Do EPIO Research or Extensor have ads?

Neither EPIO Research nor Extensor shows ads.

### Which is updated more often, EPIO Research or Extensor?

EPIO Research ships an update every 2 months, and Extensor every 5 months. Most recently, EPIO Research was updated on September 18, 2026 and Extensor on November 26, 2025.

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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.*