Suction side cleaners work by sending what is vacumned to your filter. They don't have their own collection bags. They either hook up to the skimmer or to a dedicated suction line. You can buy a 'leaf trap' that hooks inline with the cleaner and will help collect the big debris before it hits your filter system. There are different models available from several manufacturers for above ground pools. Some of them work very well.

Pressure side cleaners usually require a separate booster pump and pressure return to the pool (some are designed to hook into a return on the pool and use the pool pump only) but have their own collection bag.

The only pressure side cleaner I know of for above ground pools is the Polairis 65. It connects to the return and does not need a booster pump. I have no idea how well it works. There might be others from other companies but I have not seen them.

Robotic cleaners can be used in above ground pools and have their own collection bags. Dolphin has several models available. Their biggest drawback is the price but from the posts on this forum user satisfaction is very high!