What is poketch app 20?

There's no official app called "Poketch App 20." It's likely a misspelling or a reference to something that doesn't exist.

Here's why you might be looking for something like that:

* Pokétch: The "Pokétch" is a fictional device from the Pokémon games, similar to a smartwatch. It has various apps and features that help players in their journey.

* Pokémon GO: This popular mobile game doesn't have a specific app called "Poketch App 20." However, it does have features like "Today View" and "Nearby" that show you nearby Pokémon.

If you're looking for information on the Pokétch from the main Pokémon games, you can find details on websites like Bulbapedia. If you're interested in Pokémon GO, you can explore its features and download the app from the App Store or Google Play.

Please clarify what you mean by "Poketch App 20," and I might be able to give you a more specific answer.