Editor's Review
This listing gives away very little. Back to the Future is published by QEAPPS PRIVATE LIMITED, filed under Shopping on Google Play, sold as a paid download and rated for Everyone. The name points at the film licence and the category points at merchandise or themed shopping content rather than a game or a video service.
Past that, be careful with assumptions. A 3.75 average across a million installs is middling for a paid title, and that combination usually signals a gap between what the name led people to expect and what they found after handing over money. Because there is no free tier, the store page, the screenshots and recent user reviews are the only evidence available before you commit.
Read those reviews first, and glance at the developer's other listings to see what kind of catalogue they publish.
Features
Shopping-category app built around the Back to the Future name
Paid download rather than a free install with purchases
Rated Everyone, with no age gate on the store listing
Also published for iPhone through the App Store
Pros
One upfront price instead of a stream of in-app charges
An iPhone version exists if you move between platforms
Cons
The store listing explains very little about what you receive
No free version to evaluate before paying
A 3.75 average is low for an app people already paid for
Licensed branding sets expectations the app may not meet
Questions people ask
Is there a free version?
No. Google Play lists this as a paid download, so payment comes before installation and there is no trial tier on the store page.
Is it a game?
It is categorised under Shopping rather than Games. Study the screenshots and the developer description carefully if you were expecting gameplay.