Here's an interesting find, for anyone struggling with lost connections and download problems on Google Play. A web service called APK Downloader allows you to enter a Google Play URL, and download the .apk file for any non-paid app onto your PC. The file can then be transferred across and installed on your device manually.
It's a bit of a lifesaver for those with unrecognized devices that Google thinks are not compatible with a particular app, or anyone with a weak internet connection on their device.
There is a quota limit, which means the service may tell you to try again later, but they also offer a Chrome extension which gets around this by using your own Google Play logins to fetch the file.
For obvious reasons, this only works with free apps, but we thought it was useful enough to mention.