Yes, Ideanote uses and enforces TLS encryption. Ideanote uses TLS 1.3 by default but also supports clients with TLS as low as 1.2.
TLS 1.1 is not safe and not supported by Ideanote.
When a user visits a website or application with Ideanote instrumented, the details of their interactions are captured and sent to Ideanote over HTTPS. All data transferred over HTTPS s encrypted. Ideanote only allows connections over HTTPS exclusively to ensure data is encrypted in transit.