Hello,
HikaSubscription is a subscription add-on for HikaShop which allows to sell licenses.
These licenses have expiration date and can be renewed. There is also features like "plan downloadable files" which are files that the customer can download when its license is still active.
Regards,
Jerome - Obsidev.com
HikaMarket & HikaSerial developer / HikaShop core dev team.
Also helping the HikaShop support team when having some time or couldn't sleep.
By the way, do not send me private message, use the "contact us" form instead.