Compare Prices With ShopSavvy
You can find many applications out there that turn your smartphone into a bar-code reader, but the best one I've found is ShopSavvy. This app quickly scans any product bar code to do price-comparison shopping online and at local stores. You can also create wish lists or set up price alerts based on your scanned items. ShopSavvy is available for Android, iPhone, and Nokia devices.
Browse Android Apps Easily
If you're thinking of switching to an Android device but you need more information about the Android Market catalog than you can find on Google's official site, head to DoubleTwist's Android app site. It will help you find virtually any Android application available in the Market.
Use Your iPhone as a Mouse
For iPhone users, Logitech offers a handy free app called TouchMouse that turns your iPhone into a wireless mouse by way of your Wi-Fi network. This could be great if you wanted to sit back on the couch and control a laptop hooked up to a TV, for instance. All you need is the iPhone app and the desktop software for Windows or Mac.
Tip: If you find TouchMouse difficult to control, adjust the ‘Scrolling Speed' option under Settings on the iPhone app.
Slip Away With Fake-A-Call
Sometimes the only way out of an awkward in-person encounter is to get a well-timed phone call. Now you don't have to pray for a phone call to come in--just make it happen with the help of Fake-A-Call. This free application for Android, iPhone, and BlackBerry devices lets you schedule an interruption or create a phony phone call on the fly. Grab this tool to save yourself from any sticky situation you end up in.
Control a Jailbroken iPhone With a PC or Mac
Veency allows you to view and control a jailbroken iPhone via a Mac or PC using a Wi-Fi connection. The tool is an interesting application to try out if you want to control your iPhone's iTunes interface while it's connected to a set of speakers across the room, for example. Or how about typing notes into your device through the Notes app from a full keyboard? Not bad at all.
iPhoneHacks.com has a nice tutorial on how to install the software and run it for both Macs and PCs. You can find a number of VNC clients, such as TightVNC and UltraVNC for PCs and Chicken of the VNC for Macs.
Get a Personal Trainer
The huge range of smartphone fitness apps has made it easier than ever to track your exercise habits. I use RunKeeper on my iPhone to track my weekly jogs, including my speed, distance, and routes; I can even share my workouts via Facebook or Twitter. I also use Lose It to track my daily calorie intake, and for fun I use the GymFu apps to guide my push-ups, crunches, and pull-ups. Check out your smartphone's app catalog to see what's available for your device.
Don't Pay for Ringtones
Android users can use Ringdroid to create their own ringtones, but iPhone users can easily create their own ringtones simply by using iTunes. For more, check out PCWorld's step-by-step instructions on how to turn any MP3 into an iPhone ringtone.
Tip: This method also works for non-DRM-protected iTunes downloads in AAC format.