Hello there, Juan, and welcome to planDisney!
I'm so happy that you came to us with your question! I see that you're preparing for an efficient trip to the Happiest Place on Earth. I love that you're planning how best to utilize your time and I'll try and explain these items to you.
Disneyland Resort's FastPass system has now evolved into
Genie+, which allows Guests to bypass the standby queue and access the attraction's
Lightning Lane when available. Genie+ may be purchased as a ticket option when you purchase them or as an add-on on the day of your visit after you enter the Park. You would make Lightning Lane reservations through the
Disneyland Mobile App and may redeem them when prompted. Please note that a few attractions use the Individual Lightning Lane, which is a separate purchase.
MagicBand+ is a device that is worn on your wrist like a watch and allows you to scan into the Parks and redeem Lightning Lanes much more efficiently since you won't have to take out your phone and pull up your ticket every time. It may be purchased at these
locations around the Disneyland Resort or on
shopdisney.com prior to your visit. They have so many different designs that I'm sure you'll find something that catches your eye! Please note that only MagicBand+ is supported at the Disneyland Resort at this time.
You may absolutely have both Genie+ and a MagicBand+ for your visit! I find both to be excellent additions to enhance my Park visit and make things go more smoothly. Your MagicBand+ also allows you to participate in
Star Wars: Batuu Bounty Hunters while in Galaxy's Edge! It's a fun way to explore Black Spire Outpost and channel your inner Boba Fett.
I hope that was helpful for you, Juan, and that you have fun planning your trip to the Happiest Place on Earth! If there is anything else that planDisney can do for you, please feel free to just ask!
We'll see ya real soon!
-Al