How to type foreign currency symbols on iOS?
You get all the currency symbols except the Baht for free on the US keyboard.

Press and hold the $ symbol and you'll see all the alternates.

To get the Baht symbol - add the thai keyboard and the Baht symbol will be added to the US keyboard. You don't need to switch to that keyboard - just add it. Similarly, you can use this answer to make shortcuts if you please for often used symbols if changing a keyboard is too long for your needs.


How can I insert symbols on iPad or iPhone?