ReactLog vs LogZero

You take a supplement every morning. But is it actually doing anything? You cut out dairy last week. Did it help — or was it something else entirely? You can't answer these questions with memory. You need data. ReactLog turns your daily habits into clear, actionable intelligence about your body. How it Works: Log what goes in — supplements, medications, food, caffeine, anything. Then check in with how you feel throughout the day: mood, energy, focus, symptoms. Takes 10 seconds. Over days and weeks, ReactLog's on-device engine analyzes your data and surfaces the correlations hiding in plain sight. That magnesium you started three weeks ago? It's correlated with 18% better sleep. That protein bar you eat on Tuesdays? Your afternoon brain fog spikes every time. This isn't guesswork. It's your own biofeedback data, processed privately on your device. What you Get: - Biofeedback OS — A living intelligence layer that monitors your active signals and flags what matters - Smart Correlations — See exactly how each input connects to how you feel, ranked by strength - Mood Intelligence — Track psychological states across 5 dimensions with quick check-ins - Supplement Tracking — Log any supplement, medication, or compound with one tap - Apple Health Sync — Automatically pulls 15+ biometrics including sleep, HRV, steps, and heart rate - Insight Engine — 38+ smart signals analyzed continuously as your data grows - Timeline — Visual history of everything you've logged, searchable and exportable - Protocols — Build and track structured supplement or wellness routines - Achievements — Stay motivated with milestones tied to real consistency Who is this For? You take supplements and wonder if they actually work. You suspect certain foods are tanking your energy. You're managing a chronic condition and need to identify triggers. Your doctor asked you to keep a symptom journal. You want to optimize how you feel — not guess. Privacy First ReactLog processes everything on your device. No cloud. No servers. No accounts required. Your health data never leaves your phone. Period. Pricing Free to download and explore. Full access to all features for $2.99/month or $29.99/year. Cancel anytime. Start logging today. The patterns are already there — ReactLog just makes them visible. ReactLog is not a medical device and does not provide medical advice, diagnosis, or treatment. Always consult your healthcare provider before making changes to your health routine. Questions? Visit reactlog.com or email support@reactlog.com Terms of Use: https://reactlog.com/terms Privacy Policy: https://reactlog.com/privacy

Track Everything. Share Nothing. LogZero is the all-in-one private life tracker for mood, habits, food, weight, exercise, meditation, medication, todos and more. Everything stays on your iPhone. No ads. No cloud. No accounts. No analytics. LogZero has security and privacy integrated into it's DNA. LogZero is built by Andrew Hoffman, LLC — owned by Andrew Hoffman: a cybersecurity architect, author and educator. ONE OFFLINE APP FOR YOUR ENTIRE DAY Mood module — multi-step daily entries with emotions, activities, gratitude notes, and free-form text. The depth of a private diary, the speed of a tap. Food module — daily recording of macros against your own targets. Can be configured to track additional vitamins, nutrients and supplements. Scan labels or log manually. Weight module — log weight over time, set goals, configure charts for easier data review. Exercise module — log workout minutes rapidly and build data to see how your workouts impact your mood and weight. Todo module — prioritized, filterable cross-day tasks with tags, completion trends, and a planning view. Meditation module — daily meditation tracking tied to correlations module to show it's impact on your mood. Medication module — schedule medication and supplement protocols, adherence tracking, prescription refill reminders and more. Correlation module — analyze data from all the other modules to draw insights into what is impacting your weight, mood and behavior. Correlation module — the most important insights from the other modules, charted, configurable and readable at at glance. 100% PRIVATE. 100% ON-DEVICE. LogZero has no servers. None. Every entry — every mood, meal, weight, symptom, medication dose, and meditation minute lives on your device and nowhere else. We can't see your data by design, and this sets our app apart from almost every competitor. No Data Collected — verified by Apple's privacy label No account required No ads. No telemetry. No third-party SDKs. Works fully offline — designed for airplane mode, weak signal, and people who explore beyond the bounds of cellular internet Full data export to CSV or JSON, anytime with optional encryption using AES-256 If you've moved away from other apps because of privacy or security concerns, LogZero is the app you are looking for. Privacy and security are baked into LogZero's DNA. SEE THE PATTERNS, NOT JUST THE ENTRIES LogZero's correlation engine surfaces relationships between your trackers: how exercise shifts your mood, what foods line up with weight changes, which activities precede your best days. The kind of analysis a cloud app uses your data to build, but instead done entirely on your phone, for your eyes only. LOGZERO PRO Free is genuinely useful — every tracker works end-to-end without paying. Pro unlocks deeper analytics, biometric & passcode support, encrypted backups, and personalization controls. $4.99/month — low-commitment, cancel anytime $34.99/year — best value, save ~42% $99 lifetime — pay once, own it forever (regularly $149) Cancel anytime in iOS Settings. WHY LOGZERO EXISTS Most wellness apps make money by selling your data, serving you ads, creating artificial scarcity, sending you to affiliate links and so on. LogZero's only revenue is your subscription. That's the entire business model — and the reason your data never leaves your phone. Track everything. Share nothing. LEGAL INFORMATION Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://logzero.app/privacy/#policy