If you are an Android user and do not update your app to version 11.7.1 today, you will not be able to access the app from Saturday 26th April until you update to version 11.7.1.
If you update it tonight, you will access it tomorrow in the same way as you do today.
If you dont update tonight, you will need your open24 number, its on the back of your Debit Card and the password that you would access the site from if you did it on your computer.
Its a different password than the code you would use on your mobile.
Its probably best to update it, its just easier, but if you dont have your password to hand, you wont be able to log on.
Reply here if stuck and somebody will write step by step instructions on how to update the app.
Apologies to @Roro999 if I offended you. I hope you understand I had no way of knowing that you may have issues. It was in no way clear from your post.