Can this app be downloaded in Mac OS 10.15.3 ?
Yes. We have a download and web app version.
Feel free to check all the links for Typesy here: https://www.typesy.com/download/
Community Moderator at Typesy
Typesy is available across most devices and platforms and is designed to work with technologies you may already have in place at your school. Typesy integrates with Google Classroom, Clever, and Classlink; for those without an existing program in place, Typesy allows for CSV imports or manual entry of student data.
Alex (The Reimagined Classroom Teacher)