Yes. While a development store or a client transfer store is still in development, you can use every feature of the Pro, Business, and Plus only plans for free, whichever plan you selected.
After the transfer
Once you transfer the store to your client (transfer of ownership) or the store subscribes to a paid Shopify plan, this free access ends. A plan selected during development doesn't carry over, so select the plan you want to use again.
If settings your plan doesn't include are still in use, automatic gift adding stops.
Good to know
On development stores, Shopify may only let you select the Free plan on the plan selection page. Every feature is still available on the Free plan.
