It's a free neobank account in Switzerland which you can open in 5 minutes (fastest experience ever!). You can do everything in app from savings and collecting interest (currently up to 1%) & payments in 3 currencies to investing (here, I'd recommend degiro for cheaper options though). Nice user experience so far.
You can read more about the different neobanks in Switzerland and beyond in my blog:
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It's time to get your Invitation.codes account too 😎