Apple 14 has been used for a year. Is battery 88 normal?

Normal. According to the query, Apple official website shows. It is normal for the battery to lose one year from 10 to 15. Apple mobile phone battery maintenance method: the official iPhone can be charged 30% to 80% at a time, not too full, and the mobile phone battery can be charged in time when it is about 20% to 45%. Don't wait until the battery is too low.