Last updated July 6, 2026
Taper ("we") provides AI-assisted, human-supervised endurance coaching delivered by text message. Taper currently operates in two modes: a waitlist for our upcoming founding cohort, and an active pilot coaching program with a small group of participants. This policy explains what we collect in each case and how we use it.
Waitlist: when you join the waitlist we collect your phone number and, optionally, your race and race date.
Pilot participants: if you are enrolled in the pilot coaching program, we additionally collect, with your consent, wearable and training data through the Whoop integration you authorize. This includes recovery metrics such as heart rate variability (HRV), resting heart rate, sleep data, and daily training strain, along with the training details and messages you send us (for example, race goals, available training hours, and how sessions felt). This data is what allows Taper to make daily training recommendations.
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Waitlist members who opt in to texts receive one confirmation message when they join, then nothing until the founding cohort opens. When your cohort opens and you enroll, ongoing coaching messages begin as described below for pilot participants.
Pilot participants who have opted in, either on this website or directly with us during enrollment, receive ongoing coaching messages: daily training recommendations, recovery alerts, and periodic check-ins. Message frequency varies with your training plan and is typically one to a few messages per day. Message and data rates may apply.
Reply STOP at any time to stop receiving messages. Reply HELP for help. Consent to receive texts is not a condition of any purchase.
Waitlist phone numbers are used only to send the messages described above, and race information helps us prioritize wearable integrations and invite athletes in a sensible order. Pilot participants' wearable and training data is used solely to generate and improve your coaching guidance. We never sell, rent, or share your phone number or your health and training data with third parties for their marketing.
No mobile information will be shared with third parties/affiliates for marketing or promotional purposes. All the above categories exclude text messaging originator opt-in data and consent; this information will not be shared with any third parties.
Messages are delivered through Twilio, our SMS provider. Waitlist entries are stored with Netlify, our hosting provider. For pilot participants, wearable data is retrieved from Whoop under the authorization you grant, and coaching messages are generated using Anthropic's Claude API. Each of these providers processes your data only to provide these services.
Waitlist data is kept until launch invitations are complete or you ask us to delete it, whichever comes first.
Pilot participant data is kept for as long as you're active in the program, with no automatic deletion for inactivity alone. If you request that your data be deleted, we stop sending you coaching messages immediately and permanently delete your personal information, wearable data, training data, and message history within 7 days.
Records of any safety-related interaction (for example, a message indicating a possible medical or crisis situation) are retained for up to 2 years for safety and accountability purposes, after which they are anonymized so they can no longer be linked to you. Routine coaching-decision logs (for example, which guardrail rule applied on a given day) are anonymized rather than deleted, so they can no longer be tied to your phone number or identity, and may be retained to help us improve the safety and quality of our coaching logic.
You can revoke Whoop access at any time from your Whoop account, which stops all new data collection.
We do not currently maintain rolling database backups; deletion from our live database is the complete removal of your data.
To have your data deleted, text STOP or email owen@taper.coach and we'll confirm removal within 7 days.
If this policy changes in a way that affects how your data is used, we'll note it here and, if you're on the waitlist or in the pilot, tell you by text before the change applies.
Questions: owen@taper.coach