Invaluable!
I would like a currency filter but apt that it is fantastic & probably my most favored App.
Well known Apps like Honey and such haven't saved me a penny, this however has & even more so, lets one know if they are being ripped-off or cheated through false 'sales' 'promotions' that are merely price fluctuations giving the impression of a sale/bargain.
Kudos to this App!