| Who owns the device | The user: their own Android phone or iPhone. | The library: one of your own smartphones or tablets. |
| Where the reader is | In the user’s pocket, on any floor or site. | At the point where the library places the device. |
| RFID tags | HF only, through the phone’s NFC. It cannot read UHF. | HF through the device’s NFC and UHF through an external reader connected over Bluetooth. |
| What the user needs | To install the app and have a compatible NFC phone. | Nothing: they sign in on the device and operate there. |
| Coverage | The whole library, right at the shelf, with no queues. | Wherever the device is; it can be relocated. |
| Visitors and external users | They must download the app before using it. | Served with nothing to install. |
| Services beyond borrowing | Catalogue, account, renewals and phone reminders at any time. | Those of the session in front of the device. |
| Floor space | None. | That of the device stand. |
| Library management system | Both are compatible with most modern library management systems via SIP2. |
| When to choose it | A stable university community with their own phones, to whom you want to offer a branded service. | A changing public, users without a compatible phone, or specific points in the room you want to cover. |