ETF purifier website

As Salaam Alaykum,

Has anyone used or are using website that automatically purifies any ETF that you select and rebalances throughout the year? I can’t post the name of the website here but if you are using it you know which ones I’m talking about.

It costs about $100 year and I am looking for guidance or advice about whether this is a good service for investors who wish to set it and forget it.

Jazakallah for any replies.