Photo editor app Prisma has been a surprising hit on Android ever since people got wind of the limited beta test and grabbed the leaked APK, then lamented the shut down of the servers when the developers decided the beta test was over, and up until its official release a day or two ago. Even now, the servers often continue to be overloaded with plenty of requests to apply filters on top of images from everyone wanting to give this artsy app a try. Actually, part of the reason Prisma is so good is that its filters aren't simple layers and adjustments, instead there's lots of processing going on to get the result, which is why the app relies on its servers and why it has been overloaded.
Hiccups aside, if you've got Prisma installed on your phone, you may notice that a quick update to the app was released to add a much needed feature: a save button. Previously, all you could do was Share the photo to different apps, but there was no way to save the resulting "artwork" to your phone's storage. Now there's a new download button that will do just that. And that's all there is to the update.
If you were disappointed by the lack of this option, you can now go back to using Prisma and saving all the edited photos that you get when you're lucky enough to catch a free second of the servers' time. The app is available on the Play Store and at APK Mirror.