Privacy policy
Your phone use stays on your phone.
Sunlatch is a home screen app. It is built so that the most personal data it handles, how you use your phone, never leaves your phone.
What stays on your phone
- App usage. With your permission (Usage Access), Sunlatch reads when apps come to the front so it can count minutes in your Fun apps. Sessions, minutes and the minutes ledger are stored only in Sunlatch’s private storage on your phone. At setup it also reads how much you used each app in the last 30 days, so your groups and Fun list skip apps you rarely use; those numbers aren’t kept.
- Health data. With your permission, Sunlatch reads today’s step count and exercise sessions from Health Connect to check off habits such as “10-minute walk”. It stores only that a habit was done, never the health data itself, and never writes to Health Connect.
- Habits, rules, tasks, groups, wallpaper choices and settings are stored on your phone.
- Learned patterns (your usual scroll time, harder weeks) are computed on your phone. So is your Yours row: Sunlatch keeps which apps you opened from it and when for 28 days, then deletes them.
- Weekly review. Time back from scrolling and the weekly suggestion are worked out on your phone. To compare with the week before you started, Sunlatch reads Android’s own daily usage totals for your Fun apps once, and keeps one number: average minutes a day.
- Lessons are part of the app. Reading one, and your answers to recall questions, stay on your phone.
- Your accountability partner’s name (and number, if you add one) are stored on your phone only.
What you choose to share
If you add an accountability partner or tap “Share my week”, Sunlatch drafts a short note and shows you every word. It does not send it: your own messaging app opens and you decide whether to send it. A weekly note contains only counts (days the essentials were done, rest days, lessons) and, unless you switch it off, one total of time back from scrolling. It never names apps or times of day. Sunlatch’s server is not involved.
What is sent to Sunlatch’s server, and why
Some features use an AI model through Sunlatch’s server. Only this is sent:
| Feature | What is sent |
|---|---|
| Plain-language rules | The rule you type, the names and package names of your installed apps, your habit names |
| Automatic groups | The names of the apps you use, and the group names you chose |
| Habit ladder | One habit’s name, its current step, its streak count and recent misses |
| Today’s three | The brain-dump text you type |
| Habit ideas at setup | An idea you type, such as “meditate” |
Each request carries a random install code, created on your phone and not tied to your name, email or account. It is used only to stop abuse (rate limiting).
The server forwards the request to Anthropic’s Claude API to produce the answer and does not keep a copy. Requests are rejected if they contain anything other than the fields above, so app usage data cannot be sent. Every feature has an on-phone version that is used when you are offline.
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Optional metrics
Off by default. If you turn on “Share anonymous metrics”, Sunlatch will share four counts used to judge whether the app is worth keeping: whether it is still your home screen, essentials completed, escape-hatch and bypass counts, and change in Fun minutes. Never which apps you use or when. Nothing is sent yet; this page will be updated before that changes.
Your choices
- Turn off Usage Access or Health Connect at any time in system settings. Sunlatch keeps working with less automation.
- Switching back to your old home screen is one tap in Settings › Stop using Sunlatch as home.
- Uninstalling Sunlatch deletes everything it stored on your phone.
Contact
A contact address will be added before the beta opens.