ZelCore enables decentralized access to your wallet, by allowing you to create and manage locally stored wallet(s). The login credentials, as well as the PIN and the recovery questions, are not stored in a server/separate location. As a consequence, you can only access that data from your local machine.
ZelCore is a perfect application (and a suite of instruments) for users who like to have independent access to their tokens, enhanced security, and extra privacy. However, the cost of these added benefits implies the need for more storage space, as everything is kept locally.
At the basics, ZelCore is a multi-platform service, meaning it is available for desktop (Windows OS, macOS, and Linux) and mobile (GooglePlay, App Store, and on Huawei's AppGallery). Once you create an account, you can synchronize your data across platforms.
A minus of this service is the lack of proper documentation and informational materials (and probably more, the lack of exposure of the existing ones). You can find walkthrough guides, but there is no explicit, visual guide that people can (red)read (for beginner users), for understanding every feature and option the service offers. Also, the difference between having a light-node wallet/client that query full nodes data vs having the option to create your personal full-node (wallet) is not explained clearly (nor its benefits); that information is merely hinted at.
Firstly, there worth mentioning the desktop tool has a stylish interface and that it is ultra-responsiveness. Secondly, ZelCore acts as a gateway for other options and services. For that, it offers you the possibility to access some of those utilities using a proxy (by rerouting your connection to another location — e.g. Amsterdam, NL).
The tool also has a two-factor authentication method and other nice tweaks (for account recovery or hiding both the username and password). You can use different wallets and add as many assets as you want (that includes a huge variety), the Smartify option (for adding all the wallets' sums of money into the total of your portfolio, without getting anything lost), swap (for exchanges), and even embedded track history and news source addition (for the paid plans).