My 401k company just created an app for onboarding new participants.

"If you'd like me to run company software, you'll have to provide a company device for me to run it on."

Never install work software on a personal device. Security, Privacy, Expectations (regarding personal resources).

Along with this, never use personal software/accounts/services with company devices. You can't be sure who's watching and can't be sure you'll have a chance to remove/collect your personal data before being locked out of said device.