This is my list of the Top 10 Apps on my iPhone. For information, I have an iPhone 4S (not sure if all apps below are compatible with older phones or other smartphones).
1. WhatsApp
This is definitely my favourite app. For those who don't know what it is, WhatsApp is a messaging tool that allows you to send text, photos, videos, audio notes and contacts, as well as locations, with any of your friends who also have WhatsApp. Best of all, this is all sent for FREE. Yep, that magic four letter word beginning with F... Erm, I'm still talking about "free". The basic premise it that you pay a small fee to install the app, and then all the texts and other bits that you send don't cost you anything directly to send them, unlike if you were to send them through SMS or MMS.
Of course, they aren't entirely free as WhatsApp connects to the Internet to send things, but to be honest these costs are really minimal. It's an ideal app for me living far from my family and friends as it allows me to keep in touch with them, and to send them photos and other interesting bits. A great app that I use practically every day.
2. Facebook
Pretty much everyone knows the principal of Facebook by now, so I won't bother going into details to explain it. Even if you haven't got an account, you'll still know what it is (possibly through watching the movie "The Social Network"). This is the official Facebook app and is entirely free. It allows you to connect to your FB account and do on your phone pretty much all the things you normally would do on your computer, like adding statuses, links and photos, and of course spying on other peoples' lives. This is another one that I use basically every day.
3. WeatherPro
I've tried many weather forecast applications over the last couple of years, mostly with disappointing results (either wildly inaccurate forecasts or simply not enough information). A friend recommended I try WeatherPro, which isn't free (a couple of pounds, I think) but is accurate. You can see predicted weather for the next 7 days, as well as daily forecasts of the weather at 3-hourly intervals. Definitely my preferred weather-forecasting app, and certainly much better than the standard "Weather" app that comes pre-installed on iPhones (which gets it's mostly unreliable data from Yahoo!).
4. Sky Sports Football Score Centre
I like football. Specifically, English football. This app (which was originally free when I downloaded it on my iPhone 3GS but then required a small fee to re-install when I upgraded to an iPhone 4S...huh?) lets me keep up with the latest news, fixtures, scores and results from the world of English football. I definitely use this app on a daily basis, usually to give me something to read when nature... *ahem*... calls...
It's been high up on my list of most appreciated apps, but this week seems to have stopped updating properly. The fixtures and results pages are working fine, but the News page is stuck showing the news from Monday this week. I tried turning my phone off and on again (that old IT fix) but this hasn't helped. If it keeps going like this I might have to delete and re-install the app, although I'll be buggered if I'm paying for it again! Anyway, a good app that I would recommend to other English football fans (when it's working).
5. Skype
Another great app for keeping in touch with people. I generally only use it when I'm connected to a WiFi network (so it doesn't cost me anything), although mostly for instant messaging. I only have a handful of contacts on Skype, and tried my first video call this weekend - yippee! I use this to exchange free messages (not entirely free, but nowhere near as expensive as SMS) with a friend of mine who lives in Germany, who hasn't yet got himself a copy of WhatsApp (see #1 above). It's fun, and the app itself is free so can't be sniffed at really.
6. Angry Birds
I know everyone else got into this game ages ago, but I only recently purchased it (for something like 2 Swiss Francs) after trying the freeplay version. It's surprisingly fun and engaging, considering you are in essence chucking birds at pigs. It's actually a bit cleverer than that as it claims to involve physics as they would happen in the real world, and so might potentially teach the bird-flingers about something other than how many shitty red birds it takes to knock a shoddily-built house over and squash as many green pigs as possible in one go.
I've passed many hours playing this app since downloading it about 2 weeks ago, and so far I have not regretted my purchase. It's silly, it's pointless, but it's fun!
7. Blogger
Yep, that's right. I'm writing a post on my Blogger blog about my favourite smartphone apps that includes a reference to Blogger's own app. This app lets you manage the posts of all your Blogger/Blogspot blogs from the comfort of your own phone, should you find yourself computer-less with the urge to write an article. It's easy to use, although the features are fairly limited (no access to stats or comments, for example). If you want a simple interface to write simple articles, this is a good app to get - and it's free too.
8. Twitter
I am a twitterer. A tweeter. I twit. I have twat. I'm not sure if twitter is a verb in this sense and whether or not it can be conjugated, but whatever - I use the official Twitter app to check others' tweets and to send my own. It's very simple to use, which makes it the best app for me.
A while ago, on my old iPhone 3GS, my Twitter app stopped working - it would open briefly when selected but then exit back out to my normal phone screen. I tried deleting it and re-installing it, but couldn't get it to work. This lead me to try other Twitter apps, such as Echofon, Twitterific and Twitbird (as they are all free apps), but I didn't really like any of them. Finally, I noticed that the official Twitter app had an update available through the AppStore, and once I loaded and installed this the app starting working again. Joy of joys! Now I can stalk celebrities again in a legal way.
9. 101 Games
This is exactly what it sounds like - a collection of over a hundred games, all of which are free. Granted, a fair few of these games are crap and haven't been played more than once, but some are real gems. I particularly enjoy playing "White Christmas", which is a version of the classic Reversi/Othello strategy board game. As mentioned above, some of these games are just there as fillers and can be promptly ignored, but others are much better for helping to pass the time when you're sat on the toilet and your Sky Sports app isn't working.
10. Hanging with Friends
I used to like playing Hangman at school, the thrill of trying to guess a word before a little stick man suffers death by hanging. This free app is a variation of the classic game, where you play against other real people by guessing their words and hoping they don't guess yours. It's fun, but the problem is that you need other people to play against, and even then you are often left waiting for hours for them to take their turn. I sometimes imagine I can understand how frustrating it must have been to play chess via penpal.
Nethertheless, this is a fun game, and one that has actually helped to increase my vocabulary; I know now that "QOPH" is a word, and - through a subsequent disbelieving Google search - that it is the 19th letter of the Hebrew alphabet. Who says hangman can't be educational?
Well that's my top ten. I do have other, far less used apps taking up space on my iPhone, but they aren't really worth talking about.
What are your favourite apps?