Nobody announces this kind of decision loudly. A bank doesn't put out a press release saying they're rebuilding their mobile app in Flutter. A fintech startup doesn't lead with the framework choice in their launch coverage. These decisions happen internally, get implemented over a release cycle or two, and by the time anyone outside the engineering team notices, the app just feels better than it used to. But the shift is happening. Talk to mobile engineers at enough financial services companies and the same conversation comes up — Flutter is being evaluated seriously, piloted quietly, or already running in production on something the bank's customers use every day. Not at every institution. Not without real internal debate. But consistently enough that it's worth asking why. Because fintech is not an obvious fit for Flutter on paper.…