I've been a big fan of my iPhone since I got it back in October 2007. It was a game changing device for me back then. I went from carrying a phone and an iPod to work to a single device. I had mobile web browsing, good email access, and a solid phone which was a major upgrade from my Audiovox Smartphone and I could load up my audio as well. After 3rd party apps became a reality, I've slowly started to add some to my device. As I was driving home from work today, I was thinking about all the different ways the iPhone has change my work day. Since most people are already aware of the included iPhone apps, I thought I'd share some of the 3rd party apps I use on a regular basis and have added them into my routine. Todo - This is the most expensive iPhone app I've purchased and it is also the one I'd miss the most if I lost my iPhone. The iPhone doesn't have a good todo list option and I really need something to help me management my tasks. I've become a huge fan of Remember the Milk (RTM) for managing all my tasks, but the RTM iPhone app just wasn't exactly what I wanted. Todo is. Someday I'll likely write a detailed post on my task management process which after many years of struggles, I'm really happy with. Jobs – Jobs is basically a fancy timer. It helps me keep track of time I spend working for clients. I keep my hours log right there and I don't have to bother to remember how long I spent on this, I simply need to start and stop the timer. I got onto this system using the Freshbooks app, but since I stopped using Freshbooks, Jobs is my time tracker of choice. This is another area that I always struggled with until I got into a system with the iPhone. Bible - I really like reading the Bible on my iPhone for some reason. I think it was the first app I downloaded and I still use it all the time. I haven't tried any Bible apps other than this one, but I can’t imagine finding anything better. I love how I quickly change versions of the Bible and search to find the verse I was looking for. It is a great reading or studying tool. Simplify Music 2 - This is an incredible app. I have an 8GB iPhone and I like to leave space for music, podcasts, audiobooks, apps, and files. I don't get to carry all the music I might want to listen to while at work or on the road, but with this app, I can just stream it off of my Mac or PC at home. Air Sharing - I picked this one up when it was a free app while I thought it was neat I didn't realize the flexibility it gave me. Its basic function is to give you a wireless "USB key", but when you put files on it, you can read them or listen to them as needed. I use the file transfer on occasion as it is a nice option, but I'm more likely to download something I want to listen to on the way home from work or read a document I stored on it from this app. I use this the least of the apps listed here, but I'm always amazed by how it really transforms the iPhone to a computer in my mind. I no longer need to move the file to PC or sync it up to actually access the file. There are other apps that I use on a regular basis, but I don't view them as routine changing. What iPhone apps have really changed your work habits?