# HÄK: Cold, Breath & Focus — Ancestral biohacking & science > Ancestral biohacking & science (iPhone/iPad app by Benoit Jolly.) - Source: https://appshunter.io/ios/app/hak-cold-breath-and-focus/id6778212403 (this page in markdown: same URL + `.md`) - Developer: [Benoit Jolly](https://appshunter.io/developer/1261188680) - Category: Health & Fitness, Lifestyle - Price: Free - Age rating: 12+ - Requires: iOS 26.0 · 19 MB - Languages: English - Released: 2026-06-19 - Data updated: 2026-07-22 - User reviews in markdown: https://appshunter.io/ios/app/hak-cold-breath-and-focus/id6778212403/reviews.md ## What is HÄK? Your body already knows what to do. It's just waiting for the signal. Sleep better. Boost your energy. Manage stress, strengthen immunity, stay focused. No gadgets, no guru: ancestral protocols — cold, breath, fasting, stillness — backed by science, guided step by step. 100% free. Modern comfort made us forget what the body has always known: how to use cold, breath, deprivation and stillness to repair and grow stronger. HÄK isn't another coaching app — it's a reminder. A biological wake-up call. HÄK brings together ancestral practices — those of the Samurai, the Stoics, the Vikings — and validates each one with science (PubMed, meta-analyses, clinical trials). No pseudo-science. No magic promises. Just what has worked for millennia. THE HÄK METHOD — THREE BIOLOGICAL LEVERS THRESHOLD — the art of controlled stress Cold, effort, fasting. Your body adapts and becomes antifragile. (Cold shower, Wim Hof breathing, intermittent fasting.) MATTER — the art of good input Light, water, dense food. You're literally built from what you take in. (Morning sun, conscious hydration, functional nutrition.) ANCHOR — the art of regeneration Breath, sleep, presence. The parasympathetic system repairs and rebuilds. (Heart coherence, evening ritual, meditation.) WHAT'S INSIDE • Immersive widgets that guide you step by step — never a protocol left to interpret • Multi-mode timer: countdown, stopwatch, intervals, EMOM, AMRAP — from Tabata to 16/8 fasting • 5 guided breathing exercises with animation and synced haptics: Box 4-4-4-4, 4-7-8, Wim Hof, Coherent, Physiological Sigh • Binaural soundscapes for focus, meditation, sleep, alertness and relaxation (Alpha, Theta, Delta waves — headphones recommended) • Decibel meter for vocal-release practices • Learn cards: origin, science, myths and sources for every practice • Expert Sessions: complete 3-to-5-practice protocols in the right order (Deep Sleep, Deep Work, Vagal Reset, Immune Armor…) • Free Mode to build your own session • Persistent timers: your 16/8 fast keeps running even when the app is closed • A personalized routine based on your goals, with gentle reminders — never spammy LEARN → PRACTICE → REPEAT Understand the why. Follow the guided protocol. Anchor the habit. Knowledge becomes the act, the act becomes instinct. DUAL VALIDATION Every practice passes two tests: ancestral heritage (they already did it) and scientific evidence (now we know why). Both are mandatory. 100% FREE Every practice, every widget, every Expert Session — no subscription, no credit card. HÄK is completely free. Cold awakens. Deprivation builds. Calm repairs. Rediscover what the body already knows. Welcome to HÄK. Our very first release is here. Reawaken your biological intelligence with ancestral protocols backed by science: cold, breath, fasting, sleep, stillness. We just launched — tell us everything at contact@hak-method.com. ## Version history (last 4 releases) ### 1.3 — 2026-07-20 Indicate your health considerations to see at a glance which practices aren't recommended for you. ### 1.2 — 2026-07-06 • Collect your XP: the jar on the home screen fills with every practice — harvest when ready • Initiatory Path: explore the 8 HÄK levels and your progress on the map • Animated celebration every time you level up • 7-day Series: practice daily and multiply your XP up to x4.5 • Swipe a practice on Home to remove it from your routine or mute its reminder. • You can now permanently delete your account and all your data from the Profile screen. • Track your home ferments (kefir, kombucha, brine): log temperature and taste tests, and see at a glance when it's ready. • Track your fast live (16/8, water, dry, extended) and see what your metabolism is doing hour by hour. • Your Daily Challenge is waiting on Home: one practice picked for you each day — complete it before midnight for +25 XP. • Richer XP gain animations: particles, sparkles and golden badges • You can now reach the scientific sources from any passage in the articles, with a reminder that the content is educational. • Your streak flame now grows and comes alive day after day to celebrate your consistency. • When a streak ends, a clear card now lets you restart it in one tap. • The Streak and Levels pages now open with the same smooth zoom animation as the rest of the app. • The home "For you" carousel now always shows and highlights the practices you haven't read yet. • In the Practices tab, a "Recent" button sorts practices from newest to oldest. • The practice preview during onboarding is clearer, with an image. • The onboarding progress bar is clearer and better spaced. • Picking your practice during onboarding is more visual and readable. • Turn on a reminder for your ferments: the app notifies you when your batch should be ready to taste. • From a fermentation practice (kombucha, kefir, brine…), a button takes you straight to your fermentation tracker. • For a fermentation practice, the main action opens your fermentation tracker directly instead of a timer. • Practice XP and streak flames are now counted correctly • The amount of XP to collect now displays correctly — no more dots. • On your streak, days you've already completed are no longer greyed out by mistake. Feedback or ideas? Write to us at contact@hak-method.com — we read everything. ### 1.1 — 2026-06-23 Welcome to HÄK. Your body already knows what to do — it's just waiting for the signal. We forgot. We didn't lose it. HÄK reawakens your biological intelligence with ancestral protocols backed by science: cold, breath, fasting, sleep, stillness. In this release: • Track your fast live (16/8, water, dry, extended) and see what your metabolism is doing hour by hour • Keep an eye on your home ferments — kefir, kombucha, brine • Practice daily, grow your streak and climb the 8 HÄK levels We just launched. Feedback or ideas? Write to us at contact@hak-method.com — we read everything. ### 1.0 — 2026-06-19 No release notes. ## More apps by Benoit Jolly - [Cameo - Flobber](https://appshunter.io/ios/app/cameo-flobber/id6462827851) - [Muusie](https://appshunter.io/ios/app/muusie/id6596764943) All apps by Benoit Jolly: https://appshunter.io/developer/1261188680 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-22.*