privacy policy

last updated: august 4, 2026

arc fitness (“arc fitness,” “we,” “our,” or “us”) is a fitness tracking app operated by crown haven ventures llc, a california limited liability company. this policy describes what data we collect, how we use it, and your rights.

data we collect

account information

email address (used for authentication via one-time passcode)
name (used for personalization in the app and in email)
sex, where you provide it, used to tailor exercise selection
subscription tier, if you subscribe to arc coach

workout data

workout history (exercises, sets, reps, weights, dates)
training preferences (goal, frequency, equipment, split, units)
personal records
body weight, where you record it
arc coach conversations, including any exercise notes you save

device information

device type and operating system version (collected automatically by our infrastructure)

site activity

pages visited on this site, and which campaign link brought you here, against a random id stored in your browser rather than your name or email
if you share your email through a form on this site, the details you enter there, so we can build your first plan

how we use your data

authentication: we send sign-in codes to your email address.
lifecycle email: after you sign up, or share your email on this site, we may send a short series of onboarding and check-in emails. every one carries an unsubscribe link, and unsubscribing stops them while leaving your account and plan untouched.
notifications: arc schedules reminders on your device: a first-workout nudge, an occasional check-in if you have been away, and rest timers during a session. we record when a reminder is scheduled and when you tap one, so the timing stays sensible and the two channels do not reach you at once. the live activity rest timer registers a device token so the timer can update while the app is closed. you can turn notifications off in iOS settings at any time.
app functionality: workout data powers core features: logging, history, progress tracking, and personal records.
ai features: when you use ai-powered features (workout import, ai fill, program generation, the arc coach), the relevant inputs are sent to our ai providers (google gemini and anthropic claude) for processing. inputs may include pasted workout text, exercise names, training preferences, and coach messages. no personal identity data (email, address, phone) is included in ai requests, though your display name may appear in coach conversations.
service improvement: we may store ai inputs and the corresponding ai responses to monitor quality, debug issues, and improve our prompts and features over time. stored entries are kept for up to 90 days and then deleted. this collection is enabled by default and can be disabled at any time in iOS settings → data & privacy.

data storage

your data is stored securely on supabase (hosted on aws). all data is encrypted in transit (tls) and at rest.

we do not sell your data. we share data only with:

supabase, database and authentication provider
google (gemini api) and anthropic (claude api), workout suggestions and coach replies (workout names, history, and coach messages, no personal identity data)
resend, email delivery. receives your email address and reports back delivery, open, and click events for the emails we send you
revenuecat and apple, subscription billing and entitlement status for arc coach
vercel, site hosting and privacy-friendly page analytics

your rights

access: view all your data within the app.
deletion: delete your account and all associated data from settings. deletion is immediate and permanent.
data portability: contact us to request an export of your data.

children

arc is not intended for users under 13. we do not knowingly collect data from children.

changes

we may update this policy. material changes will be communicated through the app.

contact

for privacy questions: hello@arcfitness.app