This policy explains how the Day One mobile app ("the app", "we", "us"), published by CRESCO, handles your information. We built Day One to keep your data private — almost everything stays on your own phone.
Fill in the [highlighted] placeholders before you publish: the date and your contact email. This is a plain-language template to get you compliant, not legal advice — if you want certainty, have a professional review it.
The short version
- No account, no sign-up. You can use the whole app without giving us your name, email, or any login.
- Your data stays on your device. The details you enter — height, weight, any health notes, your goals, and your progress — are stored only on your phone. We do not upload them, and we cannot see them.
- We show ads through Google AdMob, and ad providers collect some device information to show ads. That's the one place data leaves your phone.
Information you enter
During setup and use, you may enter your height, weight, body measurements, general health notes (such as "knee pain"), goals, and workout history. This information:
- Is stored locally on your device only, using your phone's app storage.
- Is used only inside the app, to personalize your plan and show your progress.
- Is never sent to us or any server. We have no copy of it.
- Can be deleted by you at any time — use "Reset" in the app, or uninstall it, and the data is gone.
Because this data lives only on your device, we cannot recover it for you if your phone is lost or reset. Use the in-app "Back up my data" option to keep your own copy.
Advertising
Day One is free and supported by ads shown through Google AdMob. To show ads, Google and its partners may collect and process certain information, which can include:
- Your device's advertising identifier and general device information.
- Approximate location (derived from your device/IP) and ad interaction data.
This is handled by Google under its own policies, not by us. You can learn more and manage your choices here:
Where required (for example in the EU/UK), the app shows a consent choice before personalized ads are served.
Analytics
We do not use third-party analytics to track your behavior inside the app. Google may provide us with aggregate, anonymous ad-performance figures (such as total impressions), which do not identify you.
Children
Day One is intended for adults and is not directed at children under 13. We do not knowingly collect information from children.
Your choices & rights
- Delete your data: use "Reset" in the app or uninstall it.
- Control ads: reset or opt out of your advertising ID in device settings.
- Because we hold no personal data about you on our side, there is nothing for us to access, correct, or delete on a server.
Health disclaimer
Day One provides general fitness guidance and is not medical advice. It does not diagnose, treat, or replace care from a qualified professional. Check with your doctor before starting, especially if you have a health condition, are pregnant, or have been inactive for a long time.
Changes to this policy
If we change this policy, we'll update the date at the top and post the new version here. Continued use of the app means you accept the current version.
Contact
Questions about this policy? Email us at [your contact email].