This isn't a legal document. It's a plain-English explanation of exactly what we collect, why we collect it, and what we'll never do with it. No asterisks.
Your check-in ratings (energy, mood, difficulty) and your fasting times. That's it. We don't collect your location, your contacts, your browsing history, or anything else that isn't directly about your fasting.
Not to advertisers. Not to data brokers. Not to research firms. Your fasting patterns aren't a product — they're yours. We make money from subscriptions, not from selling what you tell us.
We don't use Google Analytics, Facebook Pixel, or any cross-site tracking that follows you around the web. The only analytics we use are our own, to understand how the app is being used — not who you are.
Your account settings include a delete option. One tap, and everything is gone — your profile, your fasting history, your check-in data. No support ticket, no 30-day waiting period, no dark patterns to navigate.
The AI explains every protocol decision in plain English. "I moved your window earlier because your energy scores dip on long evening fasts." Your Transparency Dashboard shows exactly what data drove each adjustment.
The daily check-in email? You opted in by using the app — and you can turn it off in settings. We don't send marketing blasts. We don't add you to "newsletters." Your inbox belongs to you.
Here's the full list. Nothing hidden.
We don't sell your data to anyone, for any reason, at any price.
We don't use advertising networks or retargeting pixels. You won't see fasting ads follow you around the internet because you used Circafast.
We don't have a "we'll use your anonymized data for research" clause buried in the terms. We're not building a dataset to sell or license.
We don't require you to give us access to your contacts, camera, or anything else your phone has. The app needs your email and your check-in responses. That's the list.
When you submit a check-in, your ratings are sent to an AI model to generate a protocol adjustment and a brief explanation. That's the product — that's what you signed up for.
The AI processes your ratings in the moment and returns a response. Your historical data (patterns over multiple weeks) is what allows the coach to learn your rhythm. We don't use your data to train AI models for other purposes or other users.
Every AI decision includes a plain-English explanation. If you ever want to understand why your window changed, it's always visible in your dashboard.
I built Circafast because I was tired of fasting apps that felt like homework — and equally tired of apps that quietly collected everything they could and hoped you wouldn't notice.
This is a small app with a simple model: you pay $4.99/month, it adapts your fasting protocol to your body. That's the whole thing. There's no ad business, no data marketplace, no hidden layer. Your fasting data helps your AI coach help you — and that's where it stays.
If you ever have a question about privacy that this page doesn't answer, email me directly: circafast@polsia.app. I read it.
Email circafast@polsia.app. We respond to every message.
This page was last updated May 2026. We'll update it if anything changes — and we'll email you if a change is significant.