Zero vs ColdKeeper

Come for the timer, stay for the Tribe. Zero is the first app designed specifically for the cold plunge and ice bath community. Whether you are an experienced practitioner or taking your first dip, Zero combines professional tracking tools with a real social network. Smart Ice Bath Timer: - Water Type Selection: Choose lake, river, or barrel right at the start for precise logging. - Wet-Hand Optimized: Large buttons and sliders designed to work even with cold fingers. - Audio Guide: Focus on your breathing, guided by ticking and gong sounds. - Apple Health Sync: Automatically save your sessions as a workout. - NEW: The Cold Stress Index (CSI) Scoring System, developed by us: -> Earn a calculated CSI score for every session you log. -> Our custom-developed formula exponentially rewards extreme cold exposure. -> Collect points, chase records, and compare your personal best with the Tribe. Join the Tribe: - Social Feed: See where others are plunging and give Kudos for mutual motivation. - Leaderboards: Compete with friends and the global community. - Level System: Your rank progression from Beginner to Ice God is now based on your hard-earned CSI points. Discover Ice Spots: - Global Map: Find hidden barrels, lakes, and river spots shared by the community. - Share Your Spots: Publish your secret locations for the Tribe. - Filters: Specifically search for wild nature spots or permanent installations. Track Your Progress: - Profile Statistics: Keep an eye on your total CSI score, personal bests, and streaks. - Temperature & Feeling: Document water temperature and how you felt. - History: A detailed timeline of all your past ice baths. - Sharing: Create stylish graphics of your sessions directly from your history. Download Zero today and master the cold. ***EULA*** https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ ***Disclaimer*** 1. Assumption of Risk The practice of ice bathing (cold water immersion), breathwork (such as the Wim Hof Method), and related activities involves inherent risks of severe physical injury, permanent disability, and death. These risks include, but are not limited to, hypothermia, cold shock response, heart attack, stroke, loss of consciousness (shallow water blackout), and drowning. By using the "Zero" app and engaging in these activities, YOU VOLUNTARILY ASSUME ALL RISKS, known and unknown, associated with your participation. 2. Mandatory Medical Consultation Cold exposure places extreme physiological stress on the body. You must consult with a qualified physician before starting any cold exposure or breathwork regimen. This is especially critical if you possess pre-existing conditions (e.g., cardiovascular disease, high blood pressure, diabetes, epilepsy, asthma) or are pregnant. Never practice ice bathing if you are under the influence of alcohol or drugs. 3. No Medical Advice The content provided by "Zero" (including timers, guides, community posts, and health data tracking) is for informational, educational, and recreational purposes only. It does not constitute medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition. 4. Limitation of Liability To the fullest extent permitted by applicable law, the creators, developers, operators, and affiliates of "Zero" expressly disclaim liability for any direct, indirect, incidental, special, or consequential damages resulting from your use of this app or your practice of cold water immersion. You agree that you are solely responsible for your own safety and well-being. 5. Safety Guidelines * NEVER practice breathwork in or near water. Do breathwork only in a safe place (e.g., on a couch or bed). * NEVER force your limits. Listen to your body. * ALWAYS ensure you have a spotter or are in a safe environment when entering cold water.

ColdKeeper is the simple, beautiful timer for cold therapy. Whether you're starting your first cold shower or running structured Wim Hof sessions, ColdKeeper turns every plunge into measurable progress. Designed for hands you can barely feel. Big tap targets. Strong haptics. Audio cues that get through closed eyes and a hood. No fiddling, no menus, no distractions when you're under the cold. — FOUR SESSION TYPES — • Ice Bath • Cold Shower • Open Water Swim • Contrast Therapy Pick a type, log the temperature (optional), tap the giant START button, and ColdKeeper handles the rest. — GUIDED PROTOCOLS — • Beginner Ramp — 30s → 60s → 2min over four weeks. The proven on-ramp. • Wim Hof — guided breath rounds plus immersion. Follow along, no YouTube. • Contrast Therapy — automatic hot/cold alternation, athlete-style recovery. • Custom (Pro) — design your own intervals. — DEEP HISTORY & STATS — Every session is saved with date, type, duration and water temperature. See your streak, total time under the cold, longest plunge, and weekly trend at a glance. Free tier keeps the last 7 days. Pro keeps everything, forever. — APPLE HEALTH — Sessions write to the Health app as "Cold Water Immersion" workouts (Pro). Your data stays on-device — ColdKeeper never sees it. — COLDKEEPER PRO — ONE-TIME UNLOCK For €7.99 / $7.99 (one-time, never expires) you unlock: • Unlimited history • All advanced protocols + custom protocol builder • Apple Health integration • iCloud sync across all your Apple devices • Home Screen widgets (streak + last session) • Detailed weekly and monthly stats • Priority support No subscription. Pay once. Keep forever. Free updates included. — PRIVACY BY DESIGN — No analytics. No ads. No tracking SDKs. No accounts. Your sessions live on your iPhone (and your private iCloud, if you opt in). The developer cannot see them. Read the full privacy policy at maximesaltet.com/coldkeeper/privacy. — BUILT NATIVELY FOR iOS — SwiftUI. SwiftData with CloudKit. StoreKit 2. Core Haptics. HealthKit. Localized in English and French. Light + dark mode. Dynamic Type ready. Built and maintained by an indie developer who actually answers your emails. — DISCLAIMER — ColdKeeper is a wellness and lifestyle app, not a medical device. Cold exposure can be dangerous. Consult a physician before starting, especially if you have cardiovascular conditions. Never plunge in open water alone. The app does not diagnose, treat, or prevent any condition. Stay frosty.