Is there a way to get this? I want to download Gear Manager but can't seem to find it.
You need to find and download "Samsung Apps.apk" and then install it on your phone. You can't get it from the Samsung Apps Store (sort of circular, but that's how it is). Let Google Search be your friend and you'll find it (I don't remember where I got it from).
Gear Manager apk file - xda-developers
Go through the posts, there is a link to APK. I got my Gear Manager from there, and it works without problem. The app is useless tho, if you don't have the GEAR yet. All the options are listed only after the device is synced with the watch.
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