Wi-Fi Sync enables wireless syncing with iTunes at the touch of a button. Never go looking for that USB cable again. Sync from the car, bed or shed whenever it suits you.

Available now on the Cydia Store for iPhone, iPod touch and iPad. You won't find it on the App Store. The app costs $9.99.
Download Wi-Fi Sync for Windows and Mac

You must install the free app on your computer to use Wi-Fi Sync. Please note that Wi-Fi Sync only works if you have also purchased and installed the app on your Apple device.

Don't attempt to restore or update your device while Wi-Fi Sync is installed on your PC; uninstall first, restore, then reinstall. If you update iTunes, you must reboot (Mac) or reinstall Wi-Fi Sync (Windows).

Wi-Fi Sync 1.1a for Windows XP, Windows Vista and Windows 7 (Requires iTunes 9.1, 10, or 10.1)
Important: the installer must be named "setup.exe" to work.
Download for Windows (v1.1a, 4.4MB)
Alternate download links: Mirror
Wi-Fi Sync for Mac OS X Snow Leopard (10.6)
Download for Snow Leopard (v1.0, 6.5MB)
Alternate download links: Mirror 1 Mirror 2
Wi-Fi Sync for Mac OS X Leopard (10.5)
Download for Leopard (v1.0, 7.9MB)
Alternate download links: Mirror 1 Mirror 2
Uninstaller for Mac OS X
Download (1KB)
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Email:
You can also follow the developer of the app, @flukes1, on Twitter.

Support and FAQs

If you're having problems with the app, please click here to open a support ticket and I'll get back to you as quickly as possible.

The following are some frequently asked questions:

What can it sync? Everything that iTunes can sync over USB - music, apps, photos, contacts, calendars, email accounts, etc.
Does this work with iPhoto? No, and it never will, due to the way iPhoto connects to the iPhone. However, you can still sync photos using iTunes.
Is there a Tiger version available? Not yet, but I'm working on it.
Can I restore or update my iPhone using this app? No, you will be prompted by iTunes to connect the USB cable at some point during the process.
Can I temporarily exit the app on my PC or Mac, while I don't need it? Unfortunately this isn't possible due to the way Wi-Fi Sync takes over the entire sync process. Closing it would also disable sync via USB (until you restart or uninstall).