PERRLA Online is our web-based writing and productivity application. You can use PERRLA Online from almost any web-browser (including on tablets). However, we recommend the following web-browsers for the best experience.
Mozilla Firefox: https://www.mozilla.org/en-US/firefox/new/
Google Chrome: https://www.google.com/chrome/
Whenever you use a web-browser, it's important that you are using the latest version (even though the update notifications are annoying). Using the latest version ensures that you are accessing the internet with the latest security updates and web standards.