Privacy Policy

Last Updated: Mar 10, 2018

The purpose of this privacy policy is to help you understand how we gather, use, and manage our customer’s information. By using Houdini and other Synapse products you consent to collection and processing of your data in accordance with this policy as well as the terms of use.

What data do we collect?

Houdini helps you to manage notifications on your phone -- it’s a simple way to only see the notifications you want, when you want it. Take back control of your phone, you decide which apps get to interrupt you and when.

In order to provide this service we access, collect, and organize the following information:

  • The list of apps you use and related metadata.
  • Incoming notifications and related metadata.
  • Your email address
  • Your location
  • Wifi, system profile and device details (model no, brand, country etc)

We use this information to provide the Houdini service and is stored on Houdini servers to improve your notification experience.

Houdini is an Android service, which means that it’s running and collecting data from the moment it’s first started until it’s uninstalled from your device.

Notification Access

Houdini functions by retrieving notifications from your system notification tray and re-organizing them in the Houdini interface. For this to work we request that you opt into Notification Access (accessible under Settings > Security > Notification access). The product will not function without this permission granted.

Note that you may disable this permission at any time, though Houdini will cease to function.

Third Party Services

Our policy does not cover third party services. For Houdini, these services include Firebase, Mixpanel and Fabric. To learn about their practices please visit their policies.

Android Permissions

We request the following android permissions for the following reasons:

  • android.permission.ACCESS_WIFI_STATE: To get WiFi details
  • android.permission.BIND_NOTIFICATION_LISTENER_SERVICE+android.permission.ACCESS_NOTIFICATION_POLICY: To listen to incoming notifications
  • android.permission.ACCESS_NETWORK_STATE+android.permission.ACCESS_NETWORK_STATE: To get the internet connection status of the user's device
  • android.permission.VIBRATE: Part of interactive onboarding
  • android.permission.RECEIVE_BOOT_COMPLETE: To be able to restart the service on reboot
  • android.permission.GET_ACCOUNTS: To fetch the email id of the user
  • android.permission.ACCESS_FINE_LOCATION: To fetch the location of the user. This will provide context which will help us personalize notifications for the user
  • + To enable push notification service of Mixpanel

Personal Information Security

We take reasonable steps to help protect your personal information in an effort to prevent loss and misuse as well as unauthorized access, disclosure, alteration and destruction.

Changes to this Policy

We may change this Policy from time to time. If we make any changes to this Policy, we will change the "Last Updated" date above. After such changes have been published to our website, your continued use of Houdini will constitute your acceptance of such revised policy.

Sharing your personally identifiable data with third parties

We will not disclose your personally identifiable data to third parties unless (1) you have given explicit consent to each such disclosure (for example, to a third party payment processor), (2) we are required to comply with a legal obligation (and in this case, we will provide you notice unless we’re prevented by law from doing so) or (3) if our business or assets, or parts of them, are acquired by a third party. Third parties who receive your personally identifiable data will be bound by applicable data protection legislation and/or this privacy policy concerning the disclosed data.


If you are under 18, or the age of majority in the jurisdiction in which you reside, you may only use Houdini with the consent of your parent or legal guardian.

Questions? Concerns? Feedback?

Please send all questions, concerns and feedback to us at

Frequently Asked Questions

Do you have access to my email messages?
We don’t have direct access to your email messages through message previews sent in notifications will flow through the Houdini service.