It would be very helpful to have a setting that lets players choose the minimum number of gems that requires a confirmation before spending them.
For example, players could set the confirmation threshold to 1, 3, 5, 10 gems, etc. Currently, it is very easy to accidentally press a button that costs 5 gems and have the purchase happen immediately, causing you to lose gems you did not intend to spend.
A customizable “Confirm Gem Spending” option would help prevent accidental purchases while still allowing players to choose how strict they want the confirmation to be.