Frequently Asked
Questions

Axle is distributed through Apple TestFlight during the testing period. Download the free TestFlight app from the App Store, then open the invite link sent to your email. TestFlight will prompt you to install Axle. Open the app and create your account using the same email address where you received the invite.

Axle requires an iPhone running iOS 16 or later. For the best experience, we recommend connecting an Apple Watch or any wearable that syncs with Apple Health. The more health data Axle can access, the better it can personalize your experience. However, a wearable is not required to use the app.

On the login screen there is a password reset option. Tap it, enter your email, and you will receive a reset link. If you run into any issues, use the Help & Support feature inside the app or email the team directly.

Yes. You can retake or update your onboarding information at any time. This includes your training experience, goals, injuries, and equipment preferences.

Three dot menu (…) → Workout Settings → Fitness Profile

When you first open the app, Axle will ask for permission to access Apple Health data. Grant access and it will automatically sync your biometrics including sleep stages, heart rate variability, resting heart rate, respiratory rate, steps, and active minutes. If you skipped this step during setup, go to your iPhone Settings → Health → Data Access & Devices → find Axle, and enable all categories.

Axle syncs the following through Apple HealthKit: sleep stages and duration, heart rate variability (HRV), resting heart rate, respiratory rate, steps, active minutes, and heart rate during workouts. This data feeds into your health scores and personalized recommendations. All data stays on your device and is encrypted.

The testing period runs from April 3 through April 16, 2026. Two weeks.

Use the app. Generate workouts, log your training, try travel reports, connect your wearable, explore the features. Spend a few minutes each day seeing what feels helpful and where it falls short. At the end, we will ask you to fill out a brief exit survey.

Yes. This is fundamental to how Axle works. The system learns from your feedback, your workout completions, your biometric data, and your preferences. Week one will feel more general. By week two, the recommendations should feel noticeably more personal. The more data you share and the more you interact with the app, the faster it learns you.

Use the Help & Support feature inside the app. It goes directly to Hunter and he will respond. For anything urgent, you can also reply to any of the emails in this sequence.

You keep access to the app. Your account stays active and the system will keep learning you. All future updates will come through TestFlight. We will be in touch with more updates after the testing period wraps.

Tap the dumbbell icon on the bottom navigation bar. Axle will consider your readiness, recent training load, movement pattern balance, and more when building the workout.

Dumbbell icon (bottom navigation)

Generate lets Axle create a full workout based on your current state — readiness, recent training, sleep, recovery, and preferences.

Build lets you describe what you want in plain language, including voice. Tell Axle something like "30 minute upper body session with dumbbells" and it builds around your request.

Log is for recording a workout you already did on your own. Logging feeds data back into the system so it can learn your patterns.

Yes. When you choose to build a workout, tap the microphone icon and describe what you are looking for in natural language. You might say something like "I have 45 minutes, a barbell and a pull up bar, and I want to focus on posterior chain" and it will generate accordingly.

Every workout flows through a personalization pipeline. Axle assembles your User Health Context — a snapshot of your biometrics, training load, readiness score, recovery state, movement pattern balance, active injuries, fitness profile, equipment, and safety status. Then it layers in your learned preferences and retrieves exercises from a library of over 1,100 validated movements through a multi-step validation process. Nothing is random.

Axle monitors your readiness score, training load, sleep quality, and recovery state. If your biometrics indicate fatigue or under-recovery, it will automatically reduce volume or intensity. This is not a mistake — it is the system doing exactly what it is designed to do: give you the right workout for today, not the hardest one.

Yes. After a workout is generated you can review it before starting. You can swap exercises, adjust sets and reps, or make modifications. Your edits also help Axle learn your preferences over time.

After completing a workout, Axle will ask you to rate the difficulty. This feedback is one of the most important signals in the system. It directly adjusts your difficulty level, exercise preferences, and future recommendations. Take a moment to answer honestly each time.

We recommend entering 5 to 10 personal records during your first few days. Add lifts like bench press, back squat, deadlift, or any movements that matter to you. You can also add time-based records like a mile run.

Three dot menu (…) → Workout Settings → Personal Records

Yes. You can add, edit, or update personal records at any time through the same menu. As you hit new PRs, update them so Axle can adjust your workout scaling accordingly.

Personal records help Axle understand your current strength and fitness levels. Without them, the app relies on your self-reported experience level. With them, it can prescribe loads and intensities calibrated to where you actually are.

Axle tracks four proprietary health scores, each on a 0 to 100 scale:

Vitality Score — your master composite score combining Energy Systems (30%), Circadian Alignment (35%), and Performance Potential (35%).

Energy Systems — measures movement quality across duration, intensity, steps, and active minutes.

Circadian Alignment — tracks your sleep/wake cycle health from sleep duration, REM sleep, resting heart rate, and UV exposure.

Performance Potential — gauges training readiness from sleep quality, HRV, resting heart rate, and respiratory rate.

Your health scores are visible on your home dashboard and included in your weekly Axle Reports. Over time, you will see trend data showing how your scores change week over week.

Low scores typically reflect recent sleep quality, high training load, or insufficient recovery. They are not a judgment — they are a signal. Axle uses these scores to adjust your recommendations accordingly.

Health scores are most accurate with wearable data through Apple HealthKit. Without one, some scores will have limited inputs. You can still use all other features, but personalization runs deeper with a connected device.

A comprehensive wellness guide for a specific destination. It includes nearby gyms with equipment details, restaurant recommendations, jet lag recovery protocols, environmental alerts (air quality, UV index, pollen), and workout modifications based on what is available at your destination.

You can generate one manually by entering a destination city and travel dates. Axle will also auto-generate reports if you have calendar sync enabled — it scans your calendar multiple times a day and detects upcoming travel events automatically.

Yes. During the testing period we encourage you to generate reports to any destination to explore the feature and see the depth of personalization.

If you grant Axle permission to access your calendar, it will scan for travel events multiple times per day. When it detects a trip — a flight booking or hotel reservation — it automatically generates a travel report and sends you a notification.

Your personalized discovery feed. It surfaces workout suggestions, product recommendations, nearby places, and behavioral recommendations — all driven by your health context, time of day, and recovery state. It should look different each time you visit and feel more personal over time.

A comprehensive wellness summary including health score trends, training insights, personal records, and personalized product recommendations. Weekly reports are generated automatically. You can also generate one manually anytime.

Axle evaluates your health data — sleep quality, training load, and recovery patterns — and matches you with relevant products from partner brands. For example, inconsistent sleep data might surface a magnesium supplement. High training load might trigger recovery support products. The system analyzes your weakest signals and routes to specific categories.

No. Product recommendations are part of the personalized experience, not a sales pitch. They close the gap between knowing something about your health and having a path to act on it.

A daily mood and wellness check-in. Log how you feel, your energy level, stress, and general mindset. You can type or use voice. Axle generates insights from your entries and uses this data as part of your overall health context.

Yes. Your mental health signals — mood, stress, and energy — are factored into your User Health Context. High stress or low energy may adjust workout intensity or trigger recovery suggestions. The system considers the whole picture, not just biometrics.

Each morning at 6:30 AM, Axle generates personalized workout suggestions based on your full health context from the night before. These appear as workout cards with an explanation of why that workout is being recommended.

Yes. Axle allows you to manage push notifications by category — daily suggestions, recovery reminders, mental health check-ins, travel reports, group activity, and more.

Axle uses your home location to personalize recommendations and detect travel. It uses a 50-mile threshold to determine whether you are home or traveling. You can update it in app settings.

Make sure you are running the latest version through TestFlight. Check for updates, then try closing and reopening the app. For persistent problems, use Help & Support inside the app to reach Hunter directly.

Go to iPhone Settings → Health → Data Access & Devices → find Axle, and make sure all data categories are enabled. New wearable connections may take a few hours for historical data to sync. Health data refreshes approximately every 15 minutes.

Use Help & Support inside the app — it goes directly to Hunter. Describe what happened, what you expected, and steps to reproduce. Screenshots are helpful. This feedback is invaluable during the testing period.

No. Your account and all your data remain active after the testing period. You will continue to have access through TestFlight, and all future updates will be pushed through TestFlight as well.