Plunge smarter with Shiver, the world's simplest cold plunge log and tracker. Start supercharging your cold plunge habit with this free iPhone app, requiring no signup or credit card. The app features a session timer to track your plunging duration with customizable sounds to signal goal completion. Additionally, Shiver offers a session chart inspired by GitHub's contribution graph, allowing you to visualize your consistency over time with colored squares. You can scroll through a session feed for detailed past session insights and access detailed statistics and graphs to analyze the frequency, temperature, and duration of your sessions across different time frames.