Have you created your own scripts for data or database schema migration?

Yes, for iOS applications I often create custom data migration scripts and database schema updates, especially when using Core Data or SQLite. For example, when changing the data model in Core Data, I write migration scripts that transform old data into the new format to avoid data loss during app updates.

An example of a SQLite schema migration with adding a new column:

let db = try Connection("path/to/db.sqlite3")
try db.run("ALTER TABLE users ADD COLUMN age INTEGER DEFAULT 0")

This approach helps to smoothly update the database structure without deleting data and with minimal impact on the user.