Get a little sluggish in the morning or afternoon? Then try out these 20 iPhone apps that will make you smarter for a price, for free, and with loads of trivia. With one or all of them, you are sure to have those neurons blazing in no time.

Paid iPhone Apps That Will Make You Smarter

Shell out anywhere from a buck or more to get the best in intelligent iPhone apps.

1. Brain Exercise: Dr. Kawashima presents a selection of puzzles designed to test and stimulate your brain. Features include a daily brain training program, a full Sudoku game, un-lockable rewards, and the ability to share high scores on your Facebook profile. You can purchase from the site or try a sample for free.

2. Brain Thaw: You are Newton, the cleverest penguin in the land, who loves to snack on digits. Eat the right numbers to solve each puzzle while watching out for yetis. There is a multiplayer option and you can also get a how-to guide on the site.

3. Trism: Reviewed and approved of by sites such as Wired and Gizmodo, this game is definitely worth a look. It is a puzzle game where the player uses triangles to solve. It sells for $2.99 and comes with several different games.

4. Scrabble: Based on the classic board game, iPhone features include shaking to shuffle letters and drag-n-drop to place tiles. You can customize, use the teacher feature, and play against your friends. Available for $4.99.

5. Big Bang Sudoku: For only $0.99, you can bring this popular puzzle game to your iPhone with impressive graphics and sound. It also comes with 10,000 puzzles, four different levels of difficulty, pencil marks, and a hint mode. They also have other brain games available for your computer.

6. Tetris: For $4.99, you can turn your iPhone into your old Gameboy with this classic. Better than the original, it comes with 15 levels and two different modes. There are also options such as tracking statistics, new soundtracks, and touch screen exclusives.

Trivia iPhone Apps That Will Make You Smarter

Pit yourself against your iPhone or other players with these top apps for intelligence.

7. Trivial Pursuit: The original trivia game, you can add it to your iPhone for $4.99. It contains over 3,500 text and picture questions with 3D graphics and sound effects. You can also play in classic, pursuit, and multiplayer mode.

8. Britannica Trivia Challenge: This app contains over 2,800 questions on topics such as geography, art, science, and others that you can carry in your iPhone. Each answer also contains detailed explanations. Available to purchase for only $6.99.

9. Wikiquiz: Simply scroll down to purchase the app for $0.99 or learn more. It is a quiz game that challenges your knowledge of popular culture by drawing randomly from the Wikipedia database. The app gives you 60 seconds to read as many articles as possible and guess the topic of each.

10. Music IQ: Simply drag the mouse to products and click Music IQ to get more information on this game and even a sample demo. The game randomly picks a song from your music library to play and you must identify it as soon as possible. Also available for iPod touch, it sells for only $0.99.

11. Sports Trivia for the Factual Intellectual: Test your knowledge with over 1,000 surprising questions pulled from various sports including golf, basketball, baseball, football, soccer, auto racing, and many others. There is a sliding interface and the price was recently dropped to $2.99. You can also scroll down the page for many other specialty trivia games.

Free iPhone Apps That Will Make You Smarter

These iPhone apps are ideal for those with huge brains and tiny wallets.

12. Mind Dojo: This is a quick and fun mind sharpening game designed to get you ready for your day. Games come in the form of short reflex tests, it can track your progress, and you can even compete online. Simply sign in for a free account to begin.

13. iSpot The Difference: Analyze two similar images and tap five differences before time is up. Points are awarded or deducted based on correct or incorrect guesses. Other features include three categories, 204 levels, and a global leader board.

14. Wisen Up: With a mix of personality quizzes, ancient cures, amazing facts, and many more, Wisen Up is going to keep you hooked for hours. It is loaded with twelve categories designed to thrill and entertain you as you progress. There is even an interactive category where players attempt to identify a sickness.

15. Google Books: Get access to millions of domain books for free with this iPhone app. You can search by author name, book title, or topics. It even comes with Optical Character Recognition to help maximize viewing from a phone.

16. Memory Match Challenge: Visit this site to find a memory challenging game to play from or on your iPhone. Choose from six different levels. Simply flip cards over until you find a match.

Free iPhone Visits That Will Make You Smarter

Visit these sites from your iPhone to get even more help in making you smarter.

17. Mathslice: Choose from a selection of games to play from your iPhone. They include lights, hangman, and others. These simple games also include Tetris and Tic Tac Toe.

18. Wordscramble: A scrambled word will appear on the screen and you must figure out how many three, four, five, and six letter words you can make from it. Enter a correct answer to get a red check. It also comes with a timer.

19. iStudent.me: This website allows you to keep track of your school assignments and grades, maintain a blog, and view pictures from a huge database of millions of photos from around the world. Other features include voice memos and a schedule. Best of all the site comes with no apps.

20. Periodic Table: Simply visit here and turn your iPhone to the horizontal viewing to begin using this free table. Get basic information on elements at a glance, or click on each to view more.

Everyone from the brainiac to student to professional will enjoy playing, viewing, and utilizing these iPhone apps for intelligence. Even those short on cash can vastly enhance their intelligence by choosing just a few of the top 20 iPhone apps that will make you smarter.