Privacy
Last updated July 21, 2026
The short version
Krunchi is a training app, not an advertising business. We collect the data you log so the app can work, we show no ads, we sell nothing about you to anyone, and you can export or permanently delete everything yourself from inside the app.
What we collect
Only what you give us:
- Account — your email address, display name and a password (stored only as a modern hash, never readable by us).
- Training data — workouts, sets, weights, RPE, check-ins, personal records, routines, runs (including GPS routes if you record them), and mindfulness minutes.
- Nutrition data — food logs, water, and macro goals.
- Body data — body weight, measurements, and optional progress photos. Photos are stored in the app's own database, private to your account. They are never shown to crewmates or anyone else.
- Optional health inputs — sleep hours and resting heart rate, if you log them.
- Optional cycle data — cycle tracking is off by default. If you turn it on, the dates you enter are used only to adjust your own training plan. This data never appears to crew members, partners or admins, and you can turn tracking off at any time.
- Coach conversations — messages you send to the AI coach.
We use two cookies: a session cookie that keeps you logged in and a security (CSRF) cookie. There are no analytics scripts, no advertising trackers, no fingerprinting.
AI processing (Anthropic)
The AI features — workout generation, the coach, meal estimates and photo food logging — are powered by Anthropic's Claude API. When you use one of them, the relevant context is sent from our server to Anthropic to produce the response: your recent training numbers, preferences and recovery state for generation and coaching, or the food photo you snapped for photo logging. Per Anthropic's commercial API terms, that data is not used to train their models. If you never use an AI feature, nothing is sent.
What we do NOT do
- No ads, ever.
- No selling, renting or sharing your data with data brokers.
- No third-party analytics or tracking SDKs.
- No reading your photos, chats or cycle data for anything except showing them back to you and running the features you asked for.
Sharing you control
If you join a crew, only the categories you toggle on (calendar, workouts, PRs, stats, body weight) are visible to those specific people, and you can change the toggles or leave at any time. Everything else — photos, nutrition, cycle and health data — is never shared.
Where your data lives
In the app's own database on our hosting provider (Railway), encrypted in transit (HTTPS). Passwords are hashed with Argon2. We keep your data for as long as you have an account.
Your controls
- Export — Settings → Data & AI usage gives you your complete data as JSON or CSV, any time.
- Delete — Settings → Account → Delete account permanently erases your account and every workout, photo, message and metric, immediately and irreversibly. No email required, no waiting period.
- Cycle tracking — opt in and out under My Plan; turning it off stops all cycle-based adjustments.
Questions
Email [email protected] and we'll answer plainly.