SlideME is a website where you can purchase apps (useful for countries where Play Store does not support purchase yet).
Will I get a notification if their apps are updated?
SlideME Application Manager (SAM) will notify you if there's an update to the apps purchased from SlideME.
SAM supports SlideME's Storage Locker. This allows you to re-download or upgrade Android applications you have previously purchased in case you lost or reset device.