The most practical mobile setup is the one you will actually use every day. That usually means Telegram, notifications, and zero dependence on a laptop.
An assistant becomes useful when it is present at the exact moment you need it: while commuting, in a queue, between meetings, or half-awake on a Sunday morning. Phone access is not a bonus. It is the whole game.
ClawHatch skips the VPS wrangling, Telegram bot setup, updates, backups, and first-message debugging. If you'd rather use OpenClaw than babysit it, that's the point.