Phase 1. Your money, answered. You're booked solid. You still don't know if you made money this month. Phase 1 tells you, every week: a P&L for your shop, what each chair actually made, which service loses money every time it's booked, every pay rule run every night, tips and refunds handled before you wake up. It runs on top of what you already use. You don't switch anything. You just finally know.
Phase 2. The phone, answered. Every call you miss while your hands are in a fill is a client who books somewhere else. Phase 2 answers it, books it, confirms it and rebooks them at checkout, on its own, so you never lose another one to voicemail.