There are more than 2 million apps in Apple's App Store and 3.8 million apps in Android's app stores. That's a lot of apps. With millions of choices, many of them free, it can be impossible to find apps you want. Below are 5 free apps I found in Apple's app store (many of which I believe are also available for Android users) that I absolutely love! They are puzzle and information based, so they're perfect for those of us who are nerdy.

1. Sudoku Mega Bundle

This is my favorite app. You can play over 80 different types of Sudoku! There are a seemingly infinite number of puzzles for each type of Sudoku and you can play four different difficulty levels for each. My favorite is "killer" Sudoku! You can play ordinary Sudoku, but if you love number puzzles, this app can introduce you to a ton of fun options.

2. Puzzledom

There are 15 different fun types of puzzles on this app! They aren't all number puzzles but they do have Sudoku. The app gives you a ton of very simple games to play for when you want mindless entertainment, but they also have a variety of challenging puzzles to really make you think! My favorite style is the plumber game where you turn pipes to get colored water from one place to another.

3. Duolingo

America stinks at being multilingual. Lots of European countries teach their kids three languages by the time they graduate high school, and we're rarely fluent in anything but English. Use Duolingo to teach yourself one of several different languages! Having a fluency or even just general practice in a second language looks fantastic on a job application and it makes travel easier! The app is great for beginners and more advanced students, you can take a placement test when you start a language or test out if you get to a section you know well!

4. TED

The TED app has a full archive of powerful and interesting TED talks. You can search by topic and add talks to your list to watch later. TED talks are an amazing mix of nerdy information and inspiration. They always teach me something and inspire me to do something with my life. The app is super simple to use, free, and awesome.

5. 1010!

It's like Tetris but slower! Basically, you place Tetris-style pieces on a 10x10 grid to try to fill in the board. When you fill in a row or column, it disappears. Your goal is to keep going as long as you can! It's simple but very fun and a great game for anyone who likes spatial puzzles. It's super addicting, so don't download it if you don't have time!

I am a big fan of puzzles and learning things, so these are some of my favorite apps! They're all free so enjoy!