Apps for iPhone have really changed the way we interact with the device. Without Apps, the iPhone is like a Lemonade without Lemon.

So here are 10 of our favorite apps which we highly recommend.

#10 – Flixster – Crazy about movies, want to get showtimes, watch trailers then this app is for you. Flixster is a great way to catch up with all your favorite movies. You could sign in via your Facebook account and rate movies and leave comments. You could post a review of a movie on your Facebook wall, check out the upcoming movies, browse movie by genre, get latest showtimes and movies playing near you. This app is totally unique.

Features – 9/10
Performance – 8/10 (lags a bit)
Price – Free

#9 – Mini piano – Though this app isn’t loaded with features but it does what its best at – you guessed it ,playing the piano. You get a mini piano for the iPhone and you could play it. As the iPhone supports Multi-Touch , you could even play chords and press multiple keys at a time. A lacking feature is that it doesn’t provide learning lessons.

Features – 7/10
Performance – 9/10
Price – Free

#8 – BackGrounds - Personalize your iPhone with this app to your hearts content. Actually not that much because Apple ,as we all know does not allow themes and stuff. But still you could at-least change the wallpaper of your Slide to Unlock screen. So this app does exactly that. With loads and loads of wallpapers available you could personalize your iPhone. You got 36 categories to choose from.

Features – 9/10 ( ads do appear)
Performance – 9/10
Price – Free

#7 – Wolfram Alpha - A web-app with a neat interface. The technology is completely unique and is optimized for the iPhone and iPod Touch. It includes a special notation keyboard, customized iPhone output, editable history, and integration with maps and other iPhone services. The additional keyboard is full of mathematical inputs and symbols which makes it better for the iPhone/iPod Touch. The app is necessary for Wolfram Alpha users because if you go to the site from Safari on your iPod Touch/iPhone you get the normal desktop view which is not suitable for the iPhone. The price is terrific and the only thing which lets it down.

Features – 9/10
Performance – 9/10
Price – $ 50 ( ha ha)

#6- Aardvark - Google recently brought Aardvark, a technology which they said they were impressed with. Aardvark is a place where you could ask questions and get answers within minutes from other users. A great way to interact and get your questions answered in less time. It even has an iPhone app with a slick interface and easy to use design. You could ask questions, answer them, log in via Facebook and much more. With Google with them it is bound to improve, so get to the App Store now and get it. It is better than Yahoo Answers. As soon as you receive answers for your questions, Aardvark sends you a push notification which makes it even fun to use.

Features – 10/10
Performance -9/10 ( lags a bit)
Price- FREE

#5 – iBeer – iBeer is a virtual beer drinking application by Hottrix. For kids you even have iMilk. You could tilt your iPhone screen and make it act as a beer glass. With 5 beers to choose from , this app is a bit of fun.

Performance – 10/10
Features – 10/10
Price – $2.99

#4 – Dictionary.com - The best offline Dictionary ever. You could view the contents of the dictionary without even logging to the internet. It has features such as Word of the Day, Thesaurus and a complete dictionary.

Features- 10/10
Performance – 8/10
Price – FREE

#3 – WordPress- I must say, this is a must have app for site owner , blog designers and every one who owns a blog. You could post your posts from your iPhone, edit them , reply to comments, post new comments , approve comments and even add new pages. There are so many features. Why not go ahead and try it for yourself. It even works for wordpress.com blogs.

Features – 8/10 ( you cannot exclude pages from navigation)
Performance – 9/10
Price – FREE

#2 Tweetie - This is a Twitter client for iPhone users. I tested a lot of Twitter clients including Twitterific, TweetDeck but this one caught me. The interface is so very plain, simple and unique. You could slide your finger to reply to a tweet, mark it as favorite or check out the users profile. It has a new offline mode by which you could save tweets or add them to Instapaper and read them later. Shorten URLs, Translate tweets, link twitter contacts to iPhone contacts are some of its unique features.

Performance – 10/10
Features – 10/10
Price – $2.99

#1 – Plants vs Zombies - Oh, Truly the most addictive game on the iPhone/iPod Touch. Earlier the game was for the Mac and now it has been ported to the iPhone/iPod Touch. It is challenging, engrossing and awesome.It feels better on a touch screen. I really can’t describe it, it is so very good. A very great game and for $2.99, definitely a steal. It has been developed by PopCap and it is truly a revolutionary game.

PopCap has once again brought in the iPhone fever.

Features – 10/10
Performance – 10/10
Price – $2.99 ( Worth it)

If you feel that there was an app that should have been included in the list, please do leave behind a comment.