# E4 Flex vs SiteOwl

The clearest difference is rating: E4 Flex at 5.0 against SiteOwl's 2.7. E4 Flex also leads on iOS requirement (13.1 vs 15.6). SiteOwl's advantage is update cadence (weekly vs every 21 months) and ratings volume (9 vs 1). On price, ads, in-app purchases and monetization model there is nothing between them.

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

E4 Flex holds the better App Store score, 5.0 against 2.7. That said, the two scores are not equally well evidenced: SiteOwl has 9 ratings behind it against 1, so its average is the more settled of the two.

E4 Flex ships an update every 21 months, SiteOwl weekly. The most recent releases landed on October 20, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | E4 Flex | SiteOwl |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/e4-flex/id1593079643/reviews)** | [2.7 (9 ratings)](https://appshunter.io/ios/app/siteowl/id6741093847/reviews) |
| Number of ratings | 1 | **9** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 21 months | **Weekly** |
| Monetization | Free | Free |
| Size | 1 MB | 83 MB |
| Requires iOS | **13.1** | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Paul Hamel](https://appshunter.io/developer/1593079645) | [Site Owl, LLC](https://appshunter.io/developer/1406664753) |

## 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


### SiteOwl

[App page](https://appshunter.io/ios/app/siteowl/id6741093847)

Manage electronic security systems with clarity and efficiency. This platform centralizes design, coordination, and field work for teams, providing real-time visibility into project status and device details. Stay proactive and reduce surprises in security system management.

**Highlights:** Security system management, Project planning and collaboration, Field work coordination, Real-time data synchronization, Device detail visibility, Floorplan integration

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

**In-app purchases:** none


## Frequently asked questions

### Is E4 Flex free?

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

### Is SiteOwl free?

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

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

E4 Flex is rated higher. E4 Flex averages 5.0 out of 5 from 1 ratings, while SiteOwl averages 2.7 from 9 ratings.

### Do E4 Flex or SiteOwl have ads?

Neither E4 Flex nor SiteOwl shows ads.

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

E4 Flex ships an update every 21 months, and SiteOwl weekly. Most recently, E4 Flex was updated on October 20, 2026 and SiteOwl on October 11, 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.*