E4 Flex vs SiteOwl
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
E4 Flex
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.
- Connect to E4 Flex readers via BLE
- Send commands to readers
- Receive responses from readers
- Configure E4 Flex readers
- Test E4 Flex readers
Read full descriptionHide full description
The E4 Flex allows users to find and connect to E4 Flex readers in close proximity using the BLE interface. The user can send commands and receive responses as if they were connected using the typical serial or network connect. This app is a new tool for field technicians to configure and test the E4 Flex Reader.
SiteOwl
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.
- Security system management
- Project planning and collaboration
- Field work coordination
- Real-time data synchronization
- Device detail visibility
- Floorplan integration
Read full descriptionHide full description
Security doesn’t have to be hit or miss. With SiteOwl, managing security is easier. Our security-system management platform gives you the clarity to see what’s going on, stay proactive, and cut down surprises. Organizations depend on electronic security systems to manage risk—but running those systems at scale gets hard. Teams need clear performance visibility, actionable data, and a sustainable way to grow without drowning in spreadsheets, floor-plan mock‑ups, and one-off workflows. Maintenance, warranties, technician handoffs, and stakeholder requests only multiply as device counts grow. SiteOwl brings design, coordination, and field work together in one mobile experience—so project teams and technicians stay aligned from planning through installation. Plan and collaborate Designers and project managers can use client floorplans to populate projects—whether you’re laying out new devices, assessing existing sites, or managing the installation process end to end. Work in the field Technicians get direct access to their SiteOwl Projects, Live Sites, and the devices tied to them. View key device details—including IP address, MAC address, installation notes, due dates, and more—and update installation status as work progresses. Stay in sync Changes made in the app sync with SiteOwl in real time, so project managers and system owners always have full visibility into what’s happening in the field—as well as in the SiteOwl web application. Whether you’re planning on a blueprint or updating devices onsite, SiteOwl helps your team operate as one—from design through deployment.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | E4 Flex | SiteOwl |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | 2.7 (9 ratings) |
| Positive reviews | — | 0.0% of reviews |
| Number of ratings | 1 | 9 — better |
| Update frequency | Every 21 months | Weekly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 13.1 — better | 15.6 |
| Further details — not scored | ||
| Size | 1 MB | 83 MB |
| Age rating | 4+ | 4+ |
| Developer | Paul Hamel | Site Owl, LLC |
Customer experience
E4 Flex
SiteOwl
In-app purchases
E4 Flex
No in-app purchases
SiteOwl
No in-app purchases









