Privacy policy

Last updated November 3, 2026

Your promises stay on your phone. Corekept has no account and no server of ours holding what you write. The one thing it sends us is anonymous usage statistics, which never include the text of a promise, and you can turn them off.

Who we are

Corekept is made by Synergy Tecnologia Ltda (CNPJ 51.033.169/0001-89), Rua Vicente Oropallo, 70, São Paulo, SP, 05351-025, Brazil. We are responsible for the data described here. For anything about privacy, write to luis@synergytec.com.br.

What stays on your phone

Your promises, blocks, Trust history, reminder times and the apps you allow in Extreme mode are stored only on your device. We can't see them, and we have no copy of them.

Android backup

If Android backup is on for your phone, Android may copy your Corekept history to your own Google account, so it comes back on a new phone or after a reinstall. That copy is managed by Google under your account, and we can't read it. You control it in your phone's backup settings.

Anonymous usage statistics

To tune how Trust works and see which features help, the app sends statistics to PostHog, the analytics service we use, on servers in the United States. They are on by default. You can turn them off at any time in the app's Settings, under Privacy, "Share usage statistics". When they are off, nothing is sent.

What is sent:

• Actions and counts, such as a block being planned and its length, how many promises were made and kept on a day, how Trust changed, and whether Extreme mode was turned on and how many apps it allows.
• A random ID created by the app, which lets us tell one install's events from another's. It isn't your name, your email or a hardware ID, and it isn't connected to your Google account.
• Technical details added by PostHog's software: app version, phone manufacturer and model, Android version, screen size, language, time zone, mobile carrier and connection type.

What is never sent: the text of your promises, your name or email, your contacts, your location from GPS, or the list of apps on your phone.

Sending anything over the internet reveals your IP address to the server receiving it. We have set PostHog to discard it, and not to work out your location from it. We don't use these statistics for advertising, and we don't sell them or share them with anyone else. We keep them for up to 24 months, then delete them.

Purchases

The one-time Unlock is sold through Google Play. Google handles the payment under its own privacy policy. We never receive your card details. The app only asks Google Play whether the Unlock has been bought, and we receive standard sales reports from Google. While usage statistics are on, the fact that an Unlock was bought is counted too, without your identity.

Permissions

• Notifications: to show the reminders you choose.
• Run at startup: to set your reminders again after your phone restarts.
• Internet and network state: for Google Play purchases and usage statistics.
• Billing: for the Unlock.
• Keep awake and background service: requested by the Android library that updates the widget.

To offer Extreme mode, the app can see which apps on your phone can be opened and which is your home app. That information stays on your phone.

The mail list

On our website you can ask us to tell you when Corekept opens on your phone. If you do, we keep your email address and which phone you chose, using PostHog in the United States, only to send you that email. We don't share or sell it. We delete it once we've told you, or whenever you ask us to. This is separate from the app, which never sends your email.

Security

Your data is kept in the app's private storage, which other apps can't read, and statistics are sent over an encrypted connection. No method is perfectly secure, so keep your phone's screen lock on.

Deleting your data

Uninstalling Corekept deletes everything it stored on your phone. To remove the Android backup too, delete it from your Google account's backup settings. Because usage statistics aren't tied to your identity, we normally can't find yours, but if you send us a request we'll help however we can.

Your rights

Depending on where you live, including under Brazil's LGPD and the EU's GDPR, you may have the right to access, correct or delete your personal data, to object to its use, and to complain to your data protection authority. Write to us to use these rights. Statistics are based on our legitimate interest in improving the app, and you can stop them at any time with the switch above.

Children

Corekept isn't directed at children under 13, and we don't knowingly collect data from them.

Changes

If we change this policy, we'll update this page and its date. If a change matters to how your data is used, we'll say so in the app or in the Google Play listing.