What a piece of crap this app is! Why did I trust it? I'm so fucking angry. I could've won the bid by myself. This app failed to place my bid which was $45 more than the winning bid. Piece of shit. Thanks for nothing

Sniping does not guarantee winning. You have to meet eBay's and seller's requirements in order to win.
This has nothing to do with the sniper, that's how eBay works.

Please always include the item number in question if you want me to check.
If you don't want to share it, let me know what did you see in the status of your snipe so I can help you to figure out what happened and how you can avoid it in the future.