• Your energy dip now follows your own pattern, so the label, plan and walk agree • Bedtime and wind-down stay at the times you set • Opening the app late no longer shifts your morning • Late sleepers see the right plan after midnight • "Afternoon dip" is now "Energy dip"

• Widgets now follow your phase through the day, even with the app closed • Home's daily sentence reflects what you actually did today • Trends shows what it's still measuring, and keeps every experiment result • Cutoff and peak hours follow your 12/24-hour setting • Fixes for notifications, widgets and German text

ARC 2.0 is a rebuild, not a coat of paint. 1.8 told you true things about circadian rhythm. 2.0 tells you about today, using your own numbers — and then shows its working. YOUR DAY, AS A PLAN The home screen is now one sentence, one ask, and the rest of your day underneath it. Blocks close when you log what closes them, and the plan re-times itself when the day does not go as expected. A CUTOFF THAT IS ACTUALLY YOURS Your last safe coffee used to be a fixed offset from waking. It is now solved from your bedtime, your caffeine metabolism and everything you have drunk today — so it moves the moment you log a cup. IT LEARNS YOUR DIP Tell us when you crash and we will use it. After about ten days of check-ins we use the hour you actually crash instead, and tell you if the two differ. TRENDS Crashes per week and whether they are falling. When your dip really lands. How often you held morning light and your cutoff — and what each one changed. WEEKLY EXPERIMENTS One change, five days, scored against the fortnight before. Including when the answer is "no difference". LEARN IS STILL HERE The Intel tab is now Learn, with all fifteen briefings kept and eight new ones added — the afternoon dip, why your cutoff moves, fast and slow caffeine metabolisers, crossing time zones, alcohol, and light in winter. We also went through the older pieces and removed every claim we could not stand behind. MOVEMENT, REST AND FOCUS Now loggable whether or not the app asked. Any log can be taken back. WIDGETS AND LOCK SCREEN Home screen widgets carry your own phase colours and your next ask. The morning light timer runs as a Live Activity, so your phone can stay in your pocket while you are outside. YOUR HISTORY COMES WITH YOU Everything you logged in 1.8 — energy, light, wake and sleep times — is carried into the new engine, so Trends starts with the history you already have rather than from zero. Also: German throughout, a 12/24-hour setting that follows your device, and editable wake time, bedtime, chronotype and caffeine sensitivity in Settings without resetting anything.

A calmer, clearer ARC. We rebuilt the app around one idea: tell you the one thing to do right now — and get out of the way. • Redesigned Home — a single focused view with a live countdown ring showing exactly what your body needs this moment. No more cluttered dashboard. • One-tap check-ins — log your energy or sleep in a single tap. ARC does the work; you just confirm. • New Progress tab — see how in-sync you're getting in plain language, with the deep charts one tap away when you want them. • Smarter & simpler — we streamlined the app to three focused tabs, and the science now shows up right where you need it. • Smoother everywhere — faster, cleaner, and more reliable. Wake with your biology, not against it.

AI Morning Debrief ARC now reads your logged caffeine, sunlight, sleep, and energy data and gives you a 2–3 sentence personal insight each morning — plus one specific action for today. Why Am I Tired? — On-Demand AI Diagnosis Log a low energy check-in and ARC now tells you the most likely cause from your data — whether it's caffeine timing, poor sleep, or a sunlight gap — and gives you one fix for right now. Smarter Home Screen The morning debrief hides automatically after 2pm so your home screen always feels relevant to the time of day. Bug fixes and performance improvements.

This update brings visual refinements and UI polish across the app. • Refined onboarding flow with cleaner layouts and tighter copy • Updated paywall design • Caffeine forecast visualization on the home screen • Smoother animations and small fixes throughout Thanks for the reviews — keep them coming.

What's new: • Live caffeine forecast on Home — watch your levels decay over the next 12 hours, with a clear sleep-safe threshold line. • 12h / 24h time format toggle — for everyone who didn't want their wake time written as 02:00. • Onboarding rebuilt for Wolves, DSPD, and night-shift workers. Less 9-to-5 bias, sharper insights. • Resume mid-quiz if you got interrupted by a call. Bug fixes — including the 3:30 AM coffee time some Wolves were seeing. Keep the reviews coming.

What's new: • Live caffeine forecast on Home — watch your levels decay over the next 12 hours, with a clear sleep-safe threshold line. • 12h / 24h time format toggle — for everyone who didn't want their wake time written as 02:00. • Onboarding rebuilt for Wolves, DSPD, and night-shift workers. Less 9-to-5 bias, sharper insights. • Resume mid-quiz if you got interrupted by a call. Bug fixes — including the 3:30 AM coffee time some Wolves were seeing. Keep the reviews coming.

What's New in This Version Fixed: Coffee timing now shows correct AM/PM for all chronotypes (no more "3:30 AM" for afternoon wakers) New: 12-hour / 24-hour time format toggle in Settings → Display Improved: Onboarding questions no longer assume a 9-5 schedule — works better for Wolves, DSPD, and non-standard routines Fixed: Sleep check-in ("How was your sleep?") now saves properly on first interaction All times across the app now display in your preferred format

For version 1.5.1 — Major update ARC 1.5.1 is a major rebuild. Here's what's new: CAFFEINE HALF-LIFE TRACKER The feature no other app has. Log any drink and watch your caffeine leave your system in real time — with a live decay curve and a sleep-safe time prediction that updates with every entry. SUNLIGHT TIMER Track your morning light exposure with a live timer and progress ring toward the 20-minute target. The single most effective thing you can do for your sleep starts at sunrise. REDESIGNED HOME SCREEN One active block, live countdown, and a contextual HUD (Sun / Move / Coffee) that adapts to the time of day. No clutter. Just what you need to do right now. 22-POINT PRECISION DIAGNOSIS The onboarding now collects a full biological profile — sleep drift, energy crash timing, caffeine habits, and work schedule — before revealing your chronotype. The most thorough circadian onboarding in the category. ADAPTIVE PROTOCOLS Your protocol now adjusts for weekends, travel, and poor sleep nights. ARC responds to your real life, not an idealized schedule. CONTEXTUAL INTEL FEED Daily briefings triggered by your actual behavior from the day before — not a static article library. UPDATED PRICING Now available as Weekly ($4.99/week) or Annual ($34.99/year). The yearly plan includes a 3-day free trial.

For version 1.5.0 — Major update ARC 1.5.0 is a major rebuild. Here's what's new: CAFFEINE HALF-LIFE TRACKER The feature no other app has. Log any drink and watch your caffeine leave your system in real time — with a live decay curve and a sleep-safe time prediction that updates with every entry. SUNLIGHT TIMER Track your morning light exposure with a live timer and progress ring toward the 20-minute target. The single most effective thing you can do for your sleep starts at sunrise. REDESIGNED HOME SCREEN One active block, live countdown, and a contextual HUD (Sun / Move / Coffee) that adapts to the time of day. No clutter. Just what you need to do right now. 22-POINT PRECISION DIAGNOSIS The onboarding now collects a full biological profile — sleep drift, energy crash timing, caffeine habits, and work schedule — before revealing your chronotype. The most thorough circadian onboarding in the category. ADAPTIVE PROTOCOLS Your protocol now adjusts for weekends, travel, and poor sleep nights. ARC responds to your real life, not an idealized schedule. CONTEXTUAL INTEL FEED Daily briefings triggered by your actual behavior from the day before — not a static article library. UPDATED PRICING Now available as Weekly ($3.99/week) or Annual ($34.99/year). Both include a 3-day free trial.

What's New in ARC v1.2.0: - Critical Caffeine Wall Alert: New biological deadline detection. The app now specifically warns you when you've hit your 'Caffeine Wall' with a high-visibility alert to protect your deep sleep recovery. - Synchronized Biometrics: We've perfectly aligned our notification engine with the in-app countdowns. Your biological nudges and the UI are now in 1:1 sync. - Optimized Hero Card: A redesigned, simplified home screen interface that puts your most critical biological goal front and center with improved visual hierarchy. - Bio-Anchor Tracking: Improved one-tap sunlight logging to anchor your circadian rhythm and build your biological baseline. - Real Data Insights: Bio Analysis charts are now fully dynamic, reflecting your actual sunlight latency and wake stability over the last 7 days. - Architecture Cleanup: Massive under-the-hood optimization, removing unused dependencies for a lighter, faster application experience.

What's New in ARC v1.1.1: - Caffeine Wall Countdown: A live, persistent timer on your home screen showing exactly when caffeine will start interfering with your sleep. Never miss your biological cutoff. - Bio-Anchor Logging: Integrated one-tap sunlight logging. Anchor your circadian rhythm and build your biological baseline with persistent tracking. - Real-World Insights: Your Bio Analysis charts are now powered by your actual logged data. Track your Photon Latency and Anchor Stability over time. - Conversational UI: Refined notifications and interface for a clearer, jargon-free experience focused on outcomes. - Performance & Sync: Automated wake-time tracking and optimized for the fastest biometric experience.

Your circadian library just got a serious upgrade. New Intel Drops: • Social Jetlag — why sleeping in on weekends wrecks your Monday • NSDR: The Reset Button — restore dopamine in 10 minutes, no caffeine • Temperature Minimum — your body's secret clock-shifting hack • Blue Light: The Real Truth — it's not what the internet told you • Your Chronotype Is Genetic — you're not lazy, you're wired differently • Meal Timing > Calorie Counting — your gut has its own clock • Exercise As A Time Signal — movement anchors your rhythm • The 90-Minute Sleep Cycle — why you wake up groggy • Night Shift Survival Guide — protecting your clock while working against it • Dopamine & Morning Light — the motivation molecule needs photons Night Shift Intelligence: • Fixed schedule alignment for night shift workers • Smarter notification timing anchored to YOUR actual day • Logs tab now shows "Night Shift Protocol" with adjusted wake time Sun Button Fix: • Resolved tap responsiveness on the sunlight logging button • Improved feedback for chronotypes without a dedicated sunlight block

PRECISION ONBOARDING V2 We rebuilt the entire onboarding experience from the ground up: • NEW: Goal-Specific Calibration – Focus, Sleep, or Health. • NEW: Age-Aware Protocols – Your circadian rhythm changes with age. • NEW: Digital Sunset Tracking – We now know if blue light is your enemy. • NEW: Scientific Briefings – Learn about Adenosine (the molecule making you tired). • NEW: Perfect Day Preview – See your optimized day before you subscribe. Plus: Night Shift logic is now bulletproof. Sync with your biology. Download the update now.