Based on the analytics at androlib.com, the rate of software submissions on the Android Market is heading to the 250k mark.
Mind you, it includes a lot of things that you're not going to see in any app store, since it includes things that have no iOS categories like Live wallpapers, screen widgets and UI shells. Stuff like the Coca Cola live holiday wallpaper, Beautiful Widgets, Slidescreen or SPB Mobile Shell are things you won't expect to see in the Apple App Store.
As for games, I don't buiy a lot in the Android Market, but then I don't buy either in Apple App Store. Simply, mobile games suck. They are juvenile and arcade lilke. They represent what the dedicated console industry was doing back in the early nineties. Instead, I spend hundreds of bucks in games for the PS3, PS2, Wii, Xbox 360, and even on the Sony PSP.
When it comes to mobile, the best things in life are indeed free. Mobile is about communication, information sharing and delivery. Both my iOS and Android devices are full of apps like Bloomberg, eTrade, social networking apps like Facebook and Twitter, weather apps, travel apps like Kayak, movies apps like Flickster, chat apps like Yahoo Messenger, music streaming apps like Pandora, and so on and on.
Here is a list of apps that have something in common:
Google Mobile apps (Search and so on)
Google Earth
Pandora
Facebook
The Weather Channel
Flickster (Movie app)
These apps are the top free apps in both the Android Market and the Apple App Store.
When you go down to all the other popular apps like Skype, Twitter, Yahoo Messenger, fring, Palringo, eBuddy, IM+, AIM, Qik, Kik, various news apps like CBS News, New York Times Huffington Post and so on, medical apps like Epocrates, QuickOffice, Docs to Go, Evernote, Yelp, Groupon, Foursquare, Gowalla, eBay, Amazon, Kindle and so on, what's really the difference? They're practically the same on both platforms except for some platform optimizations.
Note: these are not games. These are the apps people live by to do their work and connect to their family and friends.
Where it matters:
Android apps have superior sharing capabilities. They can easily share anything from Facebook to Bluetooth. Sharing options on iOS apps are extremely limited. Compare Seesmic for Android vs. Seesmic for iOS. Every Android Twitter app can share to Evernote, but in iOS, the app has to build in that service and they are very few.
Google apps are clearly better on Android. GMail, YouTube, Google Translate, Google Search, Google Goggles, Google Earth, and not the least, Google Maps. I'm going to say, there is no better app in any platform, or in any field, than Google Maps 5.0. In the words from RIM Blackberry, Google Maps is a true superapp.
Android is the only platform to have a true official Google Reader app. I need to mention Google Sky Maps --- it is the gold standard for any star observation app. Likewise, the gold standard for any augmented reality app is the Android version of Layar. For some reason, Android scores extremely well on augmented reality apps --- its the reason why the DoD and US Pentagon is targeting Android as the basis for tactical apps.
Android apps have more I/O options. Especially in voice commands and actions, e.g. Google Voice Actions, Vlingo. Go play around with real time language translation with Google Translate. Oh, the Department of Defense is developing a real time language translation system intended to be used by US forces in countries like Afghanistan. The core of the system is an Android phone (Nexus Ones are being used in prototypes).
Another example of varied I/O are the Dolphin Browser series. Again, these browsers has no precedent in any platform in the way they use custom hand gestures for browser actions like refresh.
Twitter apps. I insist --- Touiteur (now Plume), Twicca and Tweetdeck for Android are better than any iOS Twitter app I've seen. And I've used Tweetie, Twitter for iPhone, Echofon, Twitterific, Hootsuite (also has an Android version), Seesmic for both platforms, TWeetdeck for iOS, and so on.
Facebook. For a long time, Facebook on IOS has the better app, but things have evened out in Facebook 1.5 for Android. In fact, the Android version has photo notifications the IOS version doesn't have. But overall, Android is the better Facebook platform thanks to Facebook sync to contacts and calendars, though it has to be said, Facebook integration is better on the modified Androids with HTC Sense, Samsung Touchwiz and Motoblur than the vanilla Android.