Your phone is enough to get started
Open ViewVault in a modern browser and use the search above the shelves. Movie pages, series details, episode guides and My List work without registering an account here. You can move from a group-chat recommendation to the matching title without installing anything first.
A home-screen shortcut
On browsers that offer it, use Add to Home Screen from the menu or sharing panel. That places an icon beside your other apps. If the option is absent, save a normal bookmark. Keep using the same browser profile if you want the list you already created.
What about a ViewVault APK?
There is no native Android package to download from this site. The ViewVault name also appears on unrelated watchlist and diary applications. A name match alone does not connect their accounts, subscriptions or saved entries to this catalog.
Keep the list before changing phones
Make a backup from My List and keep its complete text. Open ViewVault on the new phone, paste it into Restore backup and merge it. This moves recognized saved titles and checkpoints. It does not download the films or transfer a viewing-service account.