There are a couple of Libre apps with similar names.
The one I linked to earlier, Freestyle LibreLink app, was the one which scans your sensor to collect the reading. There are minimum system requirements of the mobile phone required to use this app. Most importantly NFC (Near field communication) compatibility.
More information and list of phones can be found here. https://freestyleserver.com/Payloads/IFU/2019/q2/ART39109-001_rev-F-Web.pdf