Gearstack vs Parameter

Gearstack shows you every morning how recovered you are. So you know how hard to go today: a tough session on strong days, recovery on tired days. The AI coach explains your trends in plain words. It is for adults aged 18 and over and starts once you agree. DAILY READINESS AT A GLANCE Your readiness view brings signals such as HRV, resting heart rate, sleep quality and activity load into one clear daily snapshot. Use it to decide whether today is better for training, focus or recovery. HRV, SLEEP AND RECOVERY Follow HRV trends, sleep stages, recovery signals and your own comparison ranges. Gearstack explains changes as wellness guidance and helps you notice which routines support your body. AI COACH FOR REAL LIFE Ask the coach about sleep routines, stress reduction, Zone 2 training, recovery or your current readiness. The coach explains trends in plain language and gives practical next steps. TRAINING AND ROUTINES Plan workouts, watch your training load and keep habits such as movement, nutrition, breathing exercises and sleep routine in view. Gearstack is built for people who want to manage energy better: athletes, shift workers, knowledge workers and anyone who wants to listen to their body more clearly. KEY FEATURES - Readiness score and a clear daily overview - HRV, resting heart rate, sleep and load trends - AI wellness coach with understandable guidance - Training, routines, nutrition and analysis in one native iOS app - Apple Health and Apple Watch integration - Home Screen widgets, Live Activities, and Apple Watch app WORKS WITH YOUR DEVICES Your iPhone is enough to start: check-ins, training, nutrition and analysis run right on your phone. It gets deepest with Apple Watch (HRV, resting heart rate, sleep stages, workouts). Polar H10 and Polar Loop connect directly via Bluetooth, Fitbit through your Fitbit account. Watches and rings from other brands work too, as soon as their app sends data to Apple Health. Data depth depends on each manufacturer's app. All brands are property of their respective owners. PRIVACY AND SAFETY Gearstack Health is a wellness and fitness app. It is not a medical device, does not diagnose conditions and does not replace professional medical advice or emergency care. Your HealthKit data stays under your control. Gearstack uses cloud AI for the coach and for meal scans, each after your consent and from age 18. Understand what your body is showing you each day. SUBSCRIPTION AND LEGAL Gearstack Pro is an auto-renewing subscription, monthly or yearly (the price is shown in the app before purchase). The introductory offer lets you try Gearstack Pro free for 3 days. After that the subscription renews automatically unless you cancel at least 24 hours before the end of the current period. You can cancel at any time in your App Store account settings. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://g-stack.app/privacy

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/