With this app it is possible to communicate between Arduino, Raspberry pi or other PCs equipped with an CC2541 or compatible BLE module like a JDY-23 or HM-10.
This app is intended as a preview for the full edition with many features.
The full edition is available in the app store as " BLEserial HM-10".
https://apps.apple.com/nl/app/bleserial-hm-10/id1602239700?l=en