You can do that, there are custom roms and open source phones. The problem is banks are legally obligated a lot of the time to pay out for fraud and scams. So in response they won't allow you to run their software unless they can verify the compute environment.

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kuschku 8 hours ago | parent [-]

So why can I access my bank account just fine via the website on my phone, but shouldn't be able to do the same via the app? Can't they offer at least a PWA version of the website for custom ROM users?

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philistine 8 hours ago | parent [-]

People tend to distrust websites. URLs are also an immutable ledger that guarantees you’re in the right spot. The web is surprisingly robust for security.

What guarantees your banking app is the right one? A PNG and an app name with no security whatsoever.

	▲	NekkoDroid 40 minutes ago \| parent \| next [-]
		> People tend to distrust websites. URLs are also an immutable ledger that guarantees you’re in the right spot. Typosquatting would like to have a word with you.
	▲	kuschku 8 hours ago \| parent \| prev [-]
		But that doesn't guarantee anything? Even if the official banking app requires tons of verification, that doesn't prevent me from modding their banking app and redistributing the modded version to up to 20 people.