To the newly created [dead] account that I can't respond to, you are correct that typical usage would be to download the app, however, there is a Start Exploring webpage that you can search on to just see messages without the app: https://www.tosslet.com/Home/StartExploring
Edit: But with Tosslet you don't need to (get to?) have an account to see (catch) messages or provide any other information (e.g. email). We have a privacy-first focus and don't require or allow the use of your actual location (gps).