Pokémon Sleep has announce features and adjustments for future updates to the app. A gift is also being given out to each player that registers before September 2nd, 2023.

Pokémon Sleep Future Features and Adjustments

News about future development plans:
We are currently working on development of the following points. We will announce through the in-game news when dates are set for new changes to be applied.
We are also continuing to work to make the app less likely to fail during sleep tracking, and to increase the stability and running speed of the app.

Points currently under development:

- Adding new Pokémon
- Adding more alarm sounds and Relaxing Sounds
- Implementing night mode for the loading screen
- Responding to an issue that makes it diffiult to meet one's bedtime
- Responding to an issue that makes it difficult to collect Berries among other things located near the edge of the screen
- Putting on the Good Sleep Day event, starting Wednesday, August 30

Known issues slated for improvement in the future:

- Pokémon recovering Energy while inside the Pokémon Box
- An issue that causes the app to run slowly or freeze on some devices
- Further optimization of battery usage during sleep Tracking

Special Presents:

Thank you for playing Pokémon Sleep! We are giving each player a gift as a token of our gratitude. You can accept it by tapping on the gift box icon in the upper right of the in-app main menu.

*Players must be registered before 4:00 a.m. UTC on September 2.

The gift includes: 10 Poké Biscuits, 30 Handy Candy S, 1 Growth Incense, and 1 Focus Incense.

Source: https://twitter.com/PokemonSleep/status/1690921201437126658