What alternative apps are there for the Stark?

First place goes to VargLink: according to users, it works better than the other unofficial apps.

• VargLink — charging control, including remote, and fault diagnostics (the bike's error log): https://varg.aupov.tech
• VargPilot — a replacement for the stock app: telemetry, HUD, logging
• starkvibe.ru — themes for VargPilot, the Stark Map and a VargPilot ↔ Stark switcher without reinstalling
• FENR — an iPhone app (App Store "FENR – Unleash your varg")
• SVAG — telemetry and balancing (TestFlight and Google Play links in the pinned messages)
• there is a separate app for WearOS watches by a chat member