Rustans.com review for Hulk Custom Fields
June 27, 2019
Update: I had to get the Pro plan to continue using the app as I intended, but I've not been able to edit and upload essential data for two days now because the app is down. I have yet to receive feedback from the developers. Original: App developers removed the ability to add URLs as metafields in the free version. Now I'll have to uninstall because I can no longer use it.
Developer Reply
There is going to be a release very very soon for adding and deleting metafields globally, so watch out this space for more.
Developer
Shopify App Store