- My family’s old subhz car keys are dying so I cloned it & use the flipper when the real one doesn’t work. It’s a car from before the 2000s so no security whatsoever.
- Apartment, lift, gym rfid. Don’t need to bring multiple sets of cards
- IR is also helpful as a backup while I procrastinate going out and buying batteries for some remotes.
Rolling keys is more of an RF thing, fobs are NFC or RFID (rolling key is still vulnerable to a simple replay attack).
For NFC/RFID it depends entirely on the card. You can easily clone Mifare Classic, but on newer ones there's no way I know of, and the software does not (yet) have support for Legic (which has been broken for over a decade).
My dogs' microchips have a body temperature sensor. When one of them is acting like they might be sick, I can take their temperature with via my Flipper's RFID reader.
Not OP, but I've used it to clone (my own!) hotel key cards. I've accidentally left my key in the room when I unlocked the door, then absentmindedly tossed the card onto the dresser instead of putting it right back into my wallet. It's nice to have a backup in my bag.
Other hotels have an iPhone app you can use to unlock your door. That's another nice backup, but I've found I can have my Flipper out and the room door open faster than I can open my phone, find the app, launch it, inevitably have to log back in because it's been more than 30 seconds since I last opened it, etc.
