No. You will have to purchase them again. Sorry.
Same applies vice-versa. If bought on another platform (ex. Android) then you will have to purchase again.
In-app purchases all work differently per platform (Android, iOS and others).
If/when Social Dummy expands to iPad and/or Mac you will not need to purchase again as they are on the same Apple platform.
Сервис поддержки клиентов работает на платформе UserEcho