Memtime automatically records time spent in the active programs on your computer and displays an activity timeline. You use that timeline to remember what you worked on and create time entries for projects. The desktop app supports Windows, macOS and Linux.
According to Memtime, the raw activity history stays on your device. Time entries that you choose to export or synchronize can be sent to connected project software. Memtime offers a free trial followed by paid plans; available integrations depend on the offering.
Source: Product overview