After an accident that damaged my hands, I am no longer able to do the two finger scrolling gesture on a MacBook touchpad. On Windows I set up so called "scrollzone", it allows me to scroll smoothly by dragging one finger along the right edge of the touchpad.
I would like to have this feature on macOS as well.
I tried many apps, namely these and none of them could do this:
I even tried to contact the developers if they would be willing to work on this, but they either ignore me or say they cannot do it.
People advise me to buy a Magic Mouse, which supposedly can do it, or to scroll with arrow keys. No, thanks. I know there are workarounds available, but I know what works best for me (scrollzone) and I am unwilling to settle for less.
I would gladly sacrifice other trackpad gestures. I cannot use them anyway.
There was a program called SideTrack that could do this, but it does not work any more. I wrote to the author, but got little help.
Best Answer
I created a free app called Scroll that allows one finger scrolling on Mac trackpads that you can download here.
UPDATE: I've released Scroll 2 that is no longer free, but includes many improvements.
Version 1 is still available for free on the website.