Toning conditioner?

Has anyone tried anything like this? Or better yet, specifically this brand pictured here? My hair is a level 5 brown, with some probably level 6 brassy highlights poking through as I’ve covered up blonde highlights in the past but they are not grown out yet. So going in for a professional toner once a month is getting too expensive! And my hair is porous so it doesn’t hold onto the toners for very long either.. I just want to cool down my brown and blue shampoos do nothing for me 😔