Privacy Policy

Huginn & Muninn · Last updated 19 September 2026

What this application is

Huginn & Muninn is a personal daily-briefing and reminder system built and operated by Michael Elrod for his own use. It has one user: the developer. There is no sign-up, no account system, and it is not distributed through any app store or offered to the public.

What Google data it accesses

The application requests a single, read-only Google scope: calendar.readonly. Once a day it reads the events on the developer's own primary Google Calendar for that day, and uses the event title, start time and all-day flag to compose a briefing.

It never writes to, modifies or deletes calendar data, and it reads no other Google product.

How that data is stored

The assembled briefing is written to a DynamoDB table in the developer's own private AWS account. It is stored as a single record that is overwritten every morning, so no history accumulates and the previous day's briefing is not retained. OAuth credentials are held encrypted in AWS Systems Manager Parameter Store as SecureString parameters. The application's HTTP API is reachable only with a bearer token known to the developer.

How that data is used and shared

Calendar data is used for exactly one purpose: displaying the developer's own daily briefing in his own phone application and home-screen widget.

It is not sold, rented or shared with any third party. It is not used for advertising, analytics, profiling or credit assessment, and it is not used to train any machine-learning or AI model. No human other than the developer reads it.

Huginn & Muninn's use of information received from Google APIs adheres to the Google API Services User Data Policy, including the Limited Use requirements.

Retention and revocation

The stored briefing is replaced daily. Access can be withdrawn at any time from Google Account permissions, which immediately and permanently revokes the application's ability to read any calendar data.

Contact

Questions about this policy can be sent to elrod.michael95@gmail.com.