Mastonaut Privacy and Data Collection Policy

The purpose of this document is to inform visitors regarding the policies with the collection, use, and disclosure of Personally Identifiable Information (PII) of users who use the Mastonaut app.

PII is defined as any information that can be used to identify an individual, either directly or indirectly. This definition is broad on purpose, and includes information such as names, email addresses, IP addresses, usernames, tracking identifiers, internet cookies, and etc.

This document displays information as pertinent to the present date, but may be updated in the future to reflect changes or clarifications to the respective policies. Any changes shall be listed in the changelog below.


2019-05-27: First version published.

Data Collection and Use

Mastonaut does not collect or use any user PII – either directly or via third party services – for the purposes of tracking, analytics, user segmentation, marketing, or any other purpose not directly related to providing the service Mastonaut is designed to provide.

Mastonaut does not disclose user PII with any third parties for any purpose.

Mastonaut stores user PII locally in the user's device. This storage is done using a system-provided encryption mechanism – the device's Keychain, which is protected by the user's system password. This information includes the user's:

When logging in to a server that provides the social network service, the user's email and password is transmitted directly to the server, and is not stored by Mastonaut. Once authentication is verified by the remote server, it provides to Mastonaut a unique cryptographic identifier which is stored in the user's device using the same encryption mechanism described above.

Important: The processing, usage, and collection of PII by the remote server is not covered by this privacy policy, since neither Mastonaut, or its developer, operate any remote servers. The user is strongly advised to review the Privacy and Data Collection Policy of the remote servers they choose to host their account.

As part of the communication between Mastonaut and remote servers, Mastonaut might store part of that data locally in the user's device in the form of caches. Caches allow Mastonaut to readily make available to the user content such as images and video files which might take a long time to be fetched from the remote server. This cache information is cleared periodically, but can be deleted manually by the user. To remove local cache files, delete the contents of the following directories:


Crash Logs

Crash Logs are text files generated by the device when an app closes in an unexpected manner, either caused by a programming error (such as bugs), or other events outside the control of the app.

macOS provides means for developers to receive anonymized crash logs for their respective Apps. As such, crash logs might be made available to Mastonaut's developer related to crash events that happen while you are using Mastonaut. These logs are made available after being anonymized, and only if this feature is enabled on your device.

To check the current configuration of your system, or to change its setting, navigate to “System Preferences” > “Security & Privacy” > “Privacy” > “Analytics” > “Share with App Developers”. You might need to click the lock button in the bottom left of the window to make the checkbox enabled.

Important: Not all information about the user's device is removed. The following information is included in crash log files:

If you would not like this information to be shared to the developer via crash logs, please disable this system feature as described above.

Links to Internet Sites

Mastonaut might display links to internet sites. If you click on a third-party link, you will be directed to that site. Note that these external sites are not operated by the developer of Mastonaut. Therefore, the user is strongly advised to review the Privacy Policy of these websites. The Mastonaut developer has no control over and assumes no responsibility for the content, privacy policies, or practices of any third-party sites or services.

If you believe some part of Mastonaut functionality violates the policies described in this document, please contact the developer immediately via email at me (at) bruno (dot) ph. If you prefer to communicate via a secure medium, a GPG key is available here.