To import your iCloud contacts, please add your iOS contacts. This will import your device contacts and your iCloud contacts.
1.) Open Cloze on your iPhone or iPad and then tap on More (...) in the lower right of your screen on iPhone/iPad.
2.) Tap on Settings
3.) Scroll down and tap on Contact Sync to expand the section and tap on the import button to import your contacts into Cloze. After Cloze determines the number of contacts on your iPhone or iPad tap on "Sync Contacts Now".
It may take a few minutes for this to complete depending on how many contacts you have on your device.