Some of my friends tell me that they have a Kindle and enjoy using it. Later, I find they don't have a Kindle but a Kindle Fire. I have two Kindles, one kept upstairs and one kept downstairs. When a friend spoke about apps on a Kindle, I asked what apps can you get on a Kindle.
I like the Kindle for reading e-books. It doesn't show me notifications of anything. Ok, not strictly true. It does show me ads for books I might want to buy but the ads only come when certain parts of the Kindle are being used. You can buy a Kindle (e-reader) without ads but you have to pay extra for that arrangement. I would not be surprised if there is an arrangement where you can pay an extra fee and have ads cease. The only ads I have seen are for books, for e-books, and I can enjoy seeing some of the possibilities.
But ads are not exactly the same as notifications. In my experience, a notification is a message that something has happened, usually that something is available or a person is trying to reach me. It is the sort of thing a secretary working with me might interrupt me to tell me: Your daughter has been born, your wife has won the lottery.
The Kindle Fire is a tablet, like the iPad or some of the Samsung tablets. They are something like a clipboard-sized iPhone. You can connect to the internet with a tablet and you can pay for an account with an internet provider to send a continuous signal to a tablet so that it can be used for all the usual computer related tasks. I have found that a computer is considerably more powerful and efficient for doing many jobs and I wait until I can use a computer instead of a cell phone or tablet.
The Kindle has one main job: to show me text in an electronic book (a single computer file of all the words in a book). The Kindle Fire has apps, short for applications or short, specialized computer programs. I just looked at the question "How many apps are available for a Kindle Fire?" And found the answer, 15,781. Puzzles, games, weather predictions, etc.
