Though it may seem like all new cameras have built-in Wi-Fi, they don't, and many, many more older cameras don't have it, either.
Eyefi's Mobi SD cards, however, put Wi-Fi in any camera with an SD card slot, letting you get the shots you want with your camera and send them straight to an Android or iOS device for viewing, editing, and sharing on the go.
The company's new Eyefi Cloud service goes a step beyond that, syncing pictures across all your devices and computers as well as those of family and friends.
In case you're unfamiliar with how Eyefi's Mobi cards work, you put the card in your camera and install the Eyefi Mobi iOS or Android app and wirelessly connect to your device by typing in a unique SSID number that comes with the card (you only need to do this once per device). Start taking pictures and the Mobi card will automatically send shots to your device.
From there, you can edit and share just as you would with a photo taken with your smartphone or tablet. Now, though, you can also set up an Eyefi Cloud account (just requires a name and e-mail address) and the mobile app will automatically sync your photos to that as well.
Once synced, any device with the Mobi app or a Web browser can be used to view, share, and manage photos.
A new Web app lets you view your photos, tag them, split or merge photos in your collection, and create albums. You can also download the full-resolution photos or just get a link for one to share privately.
If you create an album you want to share, you can send an e-mail with the link directly from the browser interface or, again, just get a link generated for sharing. Albums are dynamic, too, so if you share one and then add more to it, recipients will be notified of additions.
None of this is mandatory, by the way. You don't have to set up an account and if you want to send pictures to a Mac or Windows computer instead of a mobile device, you can do that, too.
Also, this isn't free. Well, at least not entirely. Anyone who installs the new free Mobi apps gets three months of Eyefi Cloud service when you activate an account. That goes for future and current Mobi card owners. Should you like the service, it'll run you$49 for unlimited storage for 12 months.