ALL.com is

not

a known or widely used hotel booking app for Android. There[SQ]s no significant presence of an app with that name in app stores. It[SQ]s possible :

*

The name is slightly different:

There might be a similar-sounding app with a slightly altered name.
*

It[SQ]s a very niche or localized app:

The app might only be available in a specific region or for a limited audience.
*

It[SQ]s a defunct or discontinued app:

The app may have existed in the past but is no longer available.
*

It[SQ]s a misremembered name:

You might be recalling the name incorrectly.

If you can provide more details, such as any other information you remember about the app (logo, features, etc.), it might be possible to identify it.