Reeve is a native client for managing your own Proxmox VE servers from iPhone, iPad, and Mac.
To try Reeve without a Proxmox server, use the built-in demo: on the first screen tap Add Server, then Add Manually, enter the address demo-3f9a2c7e.reeve.app, tap Continue, leave the token fields blank, and tap Add. This loads a fully interactive demonstration dataset (dashboard, VMs and containers, live metrics, snapshots, backups, and the Services tab) with no network access.
To test against your own server, add your Proxmox host with a read-only API token (Datacenter → Permissions → API Tokens; PVEAuditor role, plus VM.PowerMgmt for power controls).