I Tried to Walk Out on 10 Popular Apps With My Data. Five Slammed the Door.
Every app promises you can take your data with you. I spent a week actually trying it across ten apps I use daily — notes, tasks, health records, money, music — and timed how long it took, what came out the other side, and where the trapdoors were. Five let me leave cleanly. The other five made me work for it.