There are a total of 13 challenges in Tomb Raider. Each challenge requires you to find some collectibles. There are 4-10 collectibles per challenge.
After beating the story you will enter free roam mode and can still complete all of the challenges. Everytime you pick up one of the collectibles the game will save automatically. Completing all challenges will earn you the Inconceivable! trophy / achievement.

In my Tomb Raider iOS review, I look at whether or not the game runs well enough on mobile to justify parting with your cash.

The new Tomb Raider game shares the same “universe” as the live-action Amazon Prime series starring Sophie Turner as Lara Croft.
how the tables have turned, went from making a movie about a game to making a game about a movie/show

Composer sentenced for Bounce Back Loan abuse following Insolvency Service investigations