I use my laptop, tablet and phone . The tablet and phone have a dedicated app. All work seamlessly.
I can use other devices, not belonging to me, to access and move money , if I use my login details. There could be a small chance a key logger could save my details but I have a 9digit and 6 digit code plus 2 separate user and email log ins. I would never use any other than a family computer to log on. Plus I would clear the cache after use.