Hi guys
Apple logo stuck/ endless reboot, is there any charge if I will go to Apple store to fix this?
First I'd try rebooting your phone, but if no success, no, Apple doesn't charge to help you at the Genius Bar, unless it is determined your phone is damaged. Make an appointment before you go or you may wait hours.
To reboot, force restart your phone, by following the directions in this link for the model iPhone you own --> Force restart iPhone - Apple Support