For instant access savings, the amount of interest you receive depends on the amount of money you keep in your account, the savings period, and the applicable interest rate. Since this savings product allows you to deposit and withdraw funds at any time and has no fixed term, there are countless possible outcomes depending on how you manage your funds.
To help customers understand how much interest they can expect to receive over a given period, the Decision on the Terms and Method of Calculating the Effective Interest Rate and the Form and Content of Documents Provided to Customers prescribes a specific method for displaying the effective interest rate for this type of savings. The calculation assumes that you withdraw 1/12 of your initial deposit each month, gradually reducing the principal on which interest is calculated. This is why the amount displayed in the app is lower.
However, if you do not withdraw any funds, interest will be calculated on your entire deposited amount. Please also note that accrued interest is added to your savings balance, meaning you will earn interest on that amount as well, provided you leave it in your account.