Players who only have access to the 2014 Player’s Handbook will maintain their character options, spells, and magical items in their character sheets. Players with access to the 2024 and 2014 digital Player’s Handbooks can select from both sources when creating new characters.
Recommending the DnD beyond app is odd since it is buggy as hell and runs like hot garbage. Using the character sheets in a mobile browser has always been a faster and more stable experience for me. To the point that I actively give shit to anyone who uses the app at our table, there are still two people who are app holdouts in our group though lol.
I can only say that in my experience, it works ok.
Weird. It’s worked incredibly fine for me in app or desktop. I play and DM.
To each their own, but your “incredibly fine” is my extremely mediocre, also as a player and a DM.
It’s especially disappointing how bad it is since the corporate lizards at WotC/ Hasbro have had plenty of time at this point to dump some money into the project and get it up to snuff since the acquisition of DnD Beyond.