Remind migrated to Realm from Core Data at the end of 2015, with Alex leading the migration. Getting up and running with Realm is a cinch, but what about when you have an existing app already loose in the wild that’s entrenched in Core Data? This can mean maintaining two databases simultaneously before flipping the switch to Realm, which introduces a few extra complications. Alex discusses the reasons Remind chose to migrate and his experience leading the migration, as well as a few of the things he would have done differently in hindsight so you can learn from his mistakes and make that migration to Realm you’ve been contemplating nice and smooth.
See the discussion on Hacker News .
Transcription below provided by Realm: a replacement for SQLite & Core Data with first-class support for Swift! Check out the Swift docs!