@SquarePegGuy I have finally downloaded SleepyHead for Mac from the link you provided back then. My MacOS refused to open it because it said that it could not verify the developer and confirm that the software was malware-free. I am using my work computer as I do not have a separate computer for leisure. I will ask our IT support to take a look on Monday and let me know whether this rejection came from them or from the OS itself. I am not clear but then I am not a techie person. I would like to start learning about my sleep day by day!