Birthday Adapter

Matthias Heinisch & Dominik Schürmann | Calendar & Agenda

3 Downloads 17 Views v3.1 3.12 MB 4.1+

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(3.12 MB)

Editor's Overview

Birthday Adapter is a calendar & agenda application developed by Matthias Heinisch & Dominik Schürmann, packaged as a single Android APK of version 3.1 weighing in at 3.12 MB. The package targets Android 4.1+ and above. Below you'll find the publisher's own description, a quick spec sheet, and a short buyer-beware checklist so you know exactly what you're installing before tapping download.

Install Checklist

Only download through the button on this page — never from third-party mirrors or shortened links, which are the most common way malware spreads.
File size is a light 3.12 MB, so it installs quickly even on modest connections.
This build is signed by "Matthias Heinisch & Dominik Schürmann" — always verify the developer name matches what's listed on the app's official store page before installing an update.
After install, Android may prompt you to allow "Install from unknown sources" — approve only this one install, then revoke the permission in Settings > Apps > Special access.
We link directly to the APK file or the publisher's repository; we do not modify the binary. Always run a virus scan after any sideloaded install.

About this app

Birthday Adapter brings birthdays, anniversaries, and other events from your contacts to your Android calendars. Unlike other apps, it creates a dedicated calendar within your system, so you can view all your contact dates alongside your daily schedule in your favorite calendar app.

FEATURES
* Address Book Based: Store birthdays directly in your contacts - no manual lists to maintain or duplicate entries to manage.
* Filtering: Choose which accounts or contact groups you want to see in your calendar.
* Integration: See your contacts' birthdays directly in your favorite calendar app, organized in a separate calendar that you can show, hide, or view alongside your daily schedule whenever you want.
* Age Display: With the age automatically being added to every event, you always know which milestone is ahead.
* Beyond Birthdays: Sync any custom-labeled date from your address book - perfect for keeping track of your contacts' anniversaries or their children’s and partners' birthdays.
* Reminders: Set as many reminders as you need for your events.
* Jubilee Markers: Spot major milestones and big anniversaries.
* Customization: Tailor event titles to your liking and choose which event types should trigger a notification.
* Personalization: Use the color picker to style your birthday calendar to match your personal preference.
* Background Sync: Your calendar stays in sync with regular updates in the background.

PROBLEMS
If you have problems with this app, please report them on the following website:
https://github.com/SufficientlySecure/birthday-calendar/issues

TRANSLATIONS
Help translating Birthday Adapter on https://hosted.weblate.org/engage/birthday-adapter/

SOURCE CODE
https://github.com/SufficientlySecure/birthday-calendar

LICENSE
GPLv3

KEYWORDS
birthday calendar, birthday adapter, calendar integration, birthdays, events, special dates

OPEN SOURCE ALTERNATIVE TO
EboBirthday, Birthdays, TKBirthdayReminder, Birthday Widget

Details

Version	v3.1
Size	3.12 MB
Developer	Matthias Heinisch & Dominik Schürmann
Category	Calendar & Agenda
Package	org.birthdayadapter
Android	4.1+
Last Updated	Nov 01, 2026
Downloads	3

Frequently Asked Questions

Is Birthday Adapter free to download?
Yes. The APK file linked from this page is free. The developer may offer in-app purchases once installed, but obtaining the installer itself costs nothing.

What Android version does Birthday Adapter require?
Android 4.1+ or newer. Installing on older devices may cause crashes or refuse to install.

Is Birthday Adapter safe to install?
We link to the exact APK published by Matthias Heinisch & Dominik Schürmann. We do not modify the file. Still, as with any sideloaded app, scan it with a reputable antivirus before opening it, and only grant permissions the app genuinely needs.

How do I update Birthday Adapter?
Install the newer version on top of the old one — Android will keep your data. If the signature differs, uninstall first (you may lose local progress).

Why is the app not installing?
Common causes: not enough storage, an older Android version than 4.1+, or a conflicting build already installed. Free up space, check your OS version, and uninstall any previous copy before retrying.

How to Download & Install Birthday Adapter

Tap the Download APK button above and save the file to your device.
Open your device Settings → Security (or Apps → Special access → Install unknown apps) and allow your file manager or browser to install unknown apps for this one file only.
Open the downloaded org.birthdayadapter.apk file from your Downloads folder.
Tap Install and wait for Android to finish.
Open «Birthday Adapter» by Matthias Heinisch & Dominik Schürmann and grant only the permissions it actually needs.
Revoke the "unknown sources" permission once you are done installing.

Note: this page hosts or links to the installer only. The application name, icon and description are provided for identification. All trademarks belong to their respective owners.