No. If you’ve purchased in the past the updates are yours — no need for a subscription. You can check out their policy and unlocking guide here: Unlock a previously purchased game
For Hatch, you should be able to tap “I’ve already bought this game” and unlock the full update automatically. In some rare cases, they might not be able to detect a previous purchase. If you have any problems with upgrading, please email them at support@gameclub.io and they’ll take care of it.