The AquaBug Cleaner from Hayward is designed to automatically clean the bottom of all sizes and shapes of above-ground and on-ground pools. Manufacturer Part Number: W3500. Auto Pool Cleaners. Pool Filters.
A good cheap alternative to vacuuming by hand. It saves a lot of time.
I had an earlier version of the Aquadroid. I have used it for probably more than 10 years (I forget). Before that, I used a SIMILAR product for a similar amount of time. That oldest one used a slightly different pattern than the Aquadroid that I am replacing and was more effective at covering 90% of my pool in a shorter amount of time.
Parts are available to renew/repair the Droid. I have replaced worn feet a couple of times. There now seemed to be enough of the parts that were worn on my old Droid, and the part costs were high enough that I decided to just replace it.
I have not tried this new Aquadroid. It looks almost identical to the one that I just wore out. Maybe the path programming is more effective, like my first robot?
For reference, my pool has a flat bottom and has a vinyl liner.