Metrya vs Parameter

Metrya turns Apple Health data into clear, private AI insights. Analyze HRV, sleep, recovery, stress and training directly on your iPhone - no servers, no accounts. With your own Claude / OpenAI / Gemini key, Metrya acts as a personal health and longevity coach, asking "why am I tired?" or "is my HRV trending down?" and answering with data-grounded advice. Built for privacy, Metrya processes every metric on your iPhone. Your health data never touches our servers. Core features (free forever): Apple Health dashboard: Steps, sleep stages, heart rate, HRV, resting HR, SpO2, body temperature, body composition, VO2 max and workouts - synced automatically across the last 30 days. Daily Recovery Score: A 0-100 score calculated on-device from HRV vs your personal baseline, resting HR, sleep duration, deep and REM sleep quality, and 3-day HRV trend. Reserve: A body battery that drains as you stay awake and refills only when you genuinely rest. Sentinel: Overnight temperature, resting HR, HRV, breathing and sleep continuity fused into one signal - Clear, Watch or Alert - before you feel it. Weekly Reports: Your week ranked and read back to you - Night, Recovery and Output, each metric sorted by which way it moved. Plus a body composition trend, and BMI shown only beside waist-to-height, body fat and FFMI. Sleep and Training detail: a scrubbable hypnogram with overnight heart rate and a 7-night sleep debt ledger; heart-rate curves, zones and load for every workout. Stress Monitor: Autonomic strain from your Watch's HRV, scored against your own range, not a population average. Smart anomaly alerts: A 30-day personal baseline for 8 key metrics flags significant deviations, correlated with nearby events like alcohol, travel or hard training. Biological Age: Estimated from cardiovascular fitness, sleep quality, metabolic markers and activity level, benchmarked against age-group averages with a plain-language explanation. Set Commitments for steps, sleep, HRV, weight and more, with automatic streaks and badges. Hydration and caffeine tracking, an Apple Watch app with complications, Home Screen widgets and a full Dark Mode. Total privacy: No backend servers. No accounts. Metrya Pro: AI health chat: Ask "How did my HRV trend this week?" or "Why was my recovery so low after that flight?" The AI has full context of your data and answers with specific numbers, not generic advice. Ask about what you're looking at: a workout, a night, a chart, a report - the answer cites what's on screen. Bring Your Own Key (BYOK): Use your own Anthropic, OpenAI or Google API key. You choose the model and control the cost - calls go directly from your device to the provider. Apple Intelligence: private on-device AI analysis (supported devices) On-device models: Gemma, Qwen, Bonsai Recurring Insights: AI health reports daily or weekly, by push notification. Wellness Log: sessions (sauna, cold plunge, breathwork, meditation), check-ins (energy, mood, stress, soreness, focus) and events (supplements, caffeine, alcohol, sunlight, travel). Profile context: Tell the AI your supplement stack, equipment and dietary approach - it personalises every answer. Turn any AI advice into a trackable goal with one tap - extract full Commitments directly from chat 30-day AI context: Full detail for the last 7 days, weekly summaries for days 8-30, with anomalies surfaced automatically. AI-powered Nutrition Log - log meals in plain English and let AI extract macros, calories and micronutrients, plus a Food Reactions ledger of your own patterns Compatibility Works with any device that writes to Apple Health: Apple Watch, Oura, Ultrahuman, Whoop, Garmin, Amazfit, smart scales. Metrya Pro requires Apple Intelligence on a supported device, or your own API key from OpenAI, Anthropic or Google. Metrya is an analytics tool and does not provide medical advice, diagnosis, or treatment. Privacy Policy: https://metrya.app/privacy/ Terms of use: https://metrya.app/terms/

Parameter is a workout app built around a simple idea: you already have a subscription to an AI that is a smarter coach than any fitness app's built-in one. Connect it once, and your AI plans your training using your goals, your equipment, and your real workout history, not a generic template. Parameter's job is to run what your AI writes and log it honestly: strength, intervals, classes, and rest, tracked on iPhone and on Apple Watch. In a chat with your AI, you can ask things like: - "Plan my week. I'm training for a 10K in six weeks and I lift Tuesdays and Thursdays." - "I tweaked my knee. Adjust today's session." - "Look at last month and tell me if my squat is actually progressing." Your AI reads your profile, equipment, and history to answer, then pushes a plan or an updated workout straight into Parameter. You never touch a template or a spreadsheet, and Parameter never writes a plan on its own. Parameter runs four kinds of training: guided classes you follow in another app, structured intervals with a live segment display and heart-rate-zone targets, exercise routines with a plate calculator and your last set shown before you lift, and simple sessions for a run, ride, or walk with indoor/outdoor tagging. Rest days get their own card, with active-recovery guidance, not an empty gap in your week. On many machines that support the Bluetooth FTMS profile, Parameter sends each segment's authored targets to the equipment. On heart-rate-zone segments it also closes a loop to hold your zone, correcting speed on a treadmill and power on an indoor bike. It never chases your heart rate with incline. Starting and stopping a machine is always yours. Every interval workout also prints as a numbered console table, so a machine with no Bluetooth at all is still a first-class way to train. Parameter's Apple Watch app works fully on its own, with its own sync, so a run or a lift is tracked wrist-only if that is all you bring. Whichever device starts a workout, the other shows the exact same execution screen, not just a status line, and pause, skip, end, and adjust all work from either wrist or phone. The Digital Crown adjusts your current target or your reps before you check off a set, and watch face complications and a Smart Stack card show what's next. $1 a month, with a two-week free trial, is the only thing Parameter charges for, and it covers only the AI connection. Planning, execution, history, and a full data export stay free whether you subscribe or not. There's no Parameter account: your workouts, profile, and history live in your own private iCloud, and Parameter runs no database of its own to store them in. Parameter works with any MCP-compatible AI client, including the assistants most people already subscribe to. Parameter requires an iPhone running iOS 17 or later. An Apple Watch is recommended for live heart rate and wrist execution, but not required. Having a plan written by your AI needs an MCP-compatible AI client; building and logging your own workouts by hand works with no AI client at all. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://parameterfit.com/legal/privacy-policy/