Setting up in game currency values for shop. Value setting?

For a game, I am making I have a store that you can buy upgrades on using ingame currency. How do I set it so let’s say… if the avalible currency is less than X amount the upgrade can’t be purchased.
If anyone can help me out it would be much appreciated.

Use TinyDb to store your currency and then use if/else statements to check if value is bigger or smaller than required amount.


Use firebase to Store your currency, i do not recommend you to use tiny db because it’s not safe


Umm please tell me why TinyDb is not safe.
BTW, if you want to store currency online use Firebase, but it is a bit more complicated. Not recommending if you are a new user

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because if you save it in local there are programs with which you can edit those values ​​easily as for example CheatDroid


Thank you so much for this input I would never have known that had you not mentioned it.

You’re welcome, I’m glad I could help you