We have developed CoScreen with a highly customized screen sharing encoding and distribution pipeline which offers high performance, low system consumption and low remote control latency.
The quality you experience highly depends on the quality of your network connection (more on this here: How can I optimize my network quality to have a better CoScreen experience?) but also your overall system consumption.
If the quality indicator in CoScreen indicates that your app performance is not optimal, open your local performance monitoring tool (e.g. Activity Monitor on macOS), sort the applications & processes descending by CPU consumption and close any application that uses considerable amount of CPU.
Sharing windows can take up to 60% of one CPU core on older systems because CoScreen captures them at a higher quality than most other tools. Please us know if you face any unexpected issues by sending us a mail to firstname.lastname@example.org.