This app knows who stresses you out the most

Man at desk with hands covering face
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Having a rough day with your supposed friends?

Health and fitness app pplkpr (as in "people keeper") will track, analyze and auto-manage all of your relationships.

The free app functions when paired with a heart rate wristband to monitor your physical and emotional response to those around you by tracking when you're coming and going, who you're coming in contact with and how they make you feel.

Developed by Kyle McDonald and Lauren McCarthy, originally as part of a college project, the app now has more than 70,000 downloads and aims to improve your social life "so you don't have to."

The app uses GPS and a heart rate wristband to track your emotions and reactions. "Pplkpr implements a complex metric called 'heart rate variability' that uses subtle changes in heart rhythm to determine your emotional state. This data is correlated with the people you interact with to determine who should be auto-scheduled into your life and who should be removed."

It will notify you when it detects heightened emotion and asks you to report how you're feeling. The app will also engage with the user when their location changes, in an effort to determine whether they're about to meet someone who may or may not elicit a specific heightened emotion.

Essentially, pplkpr will figure out your relationships so that you don't have too—the app will automatically block or delete contacts and automatically schedule time with those who make you feel positively.

According to the app's site, the more you use pplkpr, the more the application will learn to understand your patterns and emotions.