Interval Timer (Privacy Friendly)

SECUSO - Security Usability Society | Sports & Health

3 Downloads 13 Views v1.2 2.86 MB 4.1+

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(2.86 MB)

Editor's Overview

Interval Timer (Privacy Friendly) is a sports & health application developed by SECUSO - Security Usability Society, packaged as a single Android APK of version 1.2 weighing in at 2.86 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 2.86 MB, so it installs quickly even on modest connections.
This build is signed by "SECUSO - Security Usability Society" — 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

Privacy Friendly Interval Timer supports the user during his/her circuit training session and helps him achieve his/her training goals. In order to support the user during his training, the app provides stopwatches, which can be configured according to the user’s own training and resting phases. In addition, the app reminds the user of previously defined training sessions via a notification.

To check the user’s goals and to recognize training progress, the app offers the possibility to retrieve statistics about the training times and the calories burned in a daily, weekly or monthly overview.

This app is part of the Privacy Friendly Apps group
developed by the research group SECUSO at Karlsruhe Institute of Technology.

How does Privacy Friendly Interval Timer differ from other similar apps?

1) Minimal permissions
Privacy Friendly Internval Timer requires the persmission "Run at startup" to automatically restart the motivation notifications when the phone reboots.

For comparison: The Top Ten similar apps from the Google Play Store, require an average of 9,1 permissions (September 2017). These are for instance the permission to access accounts, permissions to access, modify or delete storage and access to networks or the internet.

2) No advertisement
Moreover, Privacy Friendly Ludo distinguishes from many other applications in the way that it completely relinquishes advertisements. Advertisement might track a user's actions. It could also shorten battery life or use mobile data.

Feel free to contact us via:
Bluesky - @secusoresearch.bsky.social https://bsky.app/profile/secusoresearch.bsky.social
Mastodon - @SECUSO_Research@bawü.social https://xn--baw-joa.social/@SECUSO_Research/
Job opening - https://secuso.aifb.kit.edu/english/Job_Offers.php

Details

Version	v1.2
Size	2.86 MB
Developer	SECUSO - Security Usability Society
Category	Sports & Health
Package	org.secuso.privacyfriendlyintervaltimer
Android	4.1+
Last Updated	Oct 29, 2026
Downloads	3

Frequently Asked Questions

Is Interval Timer (Privacy Friendly) 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 Interval Timer (Privacy Friendly) require?
Android 4.1+ or newer. Installing on older devices may cause crashes or refuse to install.

Is Interval Timer (Privacy Friendly) safe to install?
We link to the exact APK published by SECUSO - Security Usability Society. 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 Interval Timer (Privacy Friendly)?
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 Interval Timer (Privacy Friendly)

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.secuso.privacyfriendlyintervaltimer.apk file from your Downloads folder.
Tap Install and wait for Android to finish.
Open «Interval Timer (Privacy Friendly)» by SECUSO - Security Usability Society 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.