# E4 Flex vs InstallerCUBE

The clearest difference is update cadence: InstallerCUBE at monthly against E4 Flex's every 21 months. On price, rating, ratings volume and ads there is nothing between them.

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

On the App Store both sit at effectively the same score — 5.0 for E4 Flex against 5.0 for InstallerCUBE. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

E4 Flex ships an update every 21 months, InstallerCUBE monthly. The most recent releases landed on September 16, 2026 and June 1, 2026 respectively.

## The numbers

| Metric | E4 Flex | InstallerCUBE |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/e4-flex/id1593079643/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/installercube/id6447699401/reviews) |
| Number of ratings | 1 | 1 |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 21 months | **Monthly** |
| Monetization | Free | Free |
| Size | 1 MB | 58 MB |
| Requires iOS | 13.1 | **13** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Paul Hamel](https://appshunter.io/developer/1593079645) | [CDVI Wireless S.p.A.](https://appshunter.io/developer/1475466658) |

## What reviewers say

### E4 Flex

[App page](https://appshunter.io/ios/app/e4-flex/id1593079643)

This app enables field technicians to connect to and manage E4 Flex readers via Bluetooth Low Energy. It allows for sending commands and receiving responses, facilitating configuration and testing of the readers.

**Highlights:** Connect to E4 Flex readers via BLE, Send commands to readers, Receive responses from readers, Configure E4 Flex readers, Test E4 Flex readers

**In-app purchases:** none


### InstallerCUBE

[App page](https://appshunter.io/ios/app/installercube/id6447699401)

Configure CDVI CUBEX receivers with this app. Manage transmitters, smartphones, and device settings for seamless integration. Streamline your access control system management.

**Highlights:** Configure CDVI CUBEX receivers, Manage transmitters, Manage smartphones, Manage device settings

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is E4 Flex free?

E4 Flex is free to download, with no in-app purchases.

### Is InstallerCUBE free?

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

### Which has better reviews, E4 Flex or InstallerCUBE?

E4 Flex and InstallerCUBE are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do E4 Flex or InstallerCUBE have ads?

Neither E4 Flex nor InstallerCUBE shows ads.

### Which is updated more often, E4 Flex or InstallerCUBE?

E4 Flex ships an update every 21 months, and InstallerCUBE monthly. Most recently, E4 Flex was updated on September 16, 2026 and InstallerCUBE on June 1, 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.*