Sky Dolly is an application which records and replays your flights in Flight Simulator 2020. As it is using the standard SimConnect API it works - theoretically - also with other flight simulators.
It focuses on performance, smooth replay and ease of use.
The application is currently in an early preview state and hence far from feature complete. But the existing features should work stable and as intended, that is recording (with selectable sample rates down to 1 Hz) playback (with "slow motion" and "hyperlapse") and seeking positions (also during playback) is implemented, together with a (preliminary) simple CSV import/export.
Source code is available: https://github.com/till213/SkyDolly