Read on below to learn more about Pokémon Sleep:

Update Contents (iOS version 1.0.14)

Thank you for playing Pokémon Sleep!

This update includes the following improvement.
You will need to update to the latest version through your app store.

Update Contents

Bug Fixes

• The app not progressing beyond the loading stage on the title screen in certain situations

We hope you continue to enjoy Pokémon Sleep!

Source: Official Pokémon Sleep news