The Ticketleap app for iOS supports three card swipers for devices running iOS 11 and higher, the ID TechUniMag II, the ID TechShuttle, and the ID Tech iMag Pro card readers. Review the details for each iOS swiper and find one the works best for you:
iMag Pro 2 Connector for iOS: Compatible with iOS devices, Lightening port connector (recommended)
ID-80110008-001 - ID TechUniMag II Card Reader: Compatible with iOS devices.
Please be sure that you have the volume turned all the way up on your iOS device when using this swiper.