In the digital age, apps have become an essential part of everyday life. We use them to communicate, navigate, shop, learn, work and entertain ourselves. But many free apps operate on a simple business principle: if you are not paying for the product, your data may help pay for it.
Recent privacy research shows that some of the world’s most popular apps collect surprisingly large amounts of information. A 2026 Surfshark analysis of 171 apps from major technology companies found that Meta’s apps collected an average of 25 out of 35 possible data categories, while Google apps averaged 17.
Here are ten notable examples of data-hungry apps, based on recent privacy research and app-store disclosures.
1.Meta AI —Meta AI topped Surfshark’s 2026 Big Tech analysis, declaring 33 of 35 possible data types. The information can include data associated with identity, interactions and other aspects of app use.
2.Facebook — Facebook has long been associated with extensive data collection. Earlier Surfshark research found that Facebook collected all 32 data points examined in Apple’s privacy framework at the time, with several used for tracking.
3.Instagram — Like Facebook, Instagram can collect a wide range of information about users and their activity. Its combination of social interaction, advertising and personalization makes user data particularly valuable.
4.Messenger — Messenger has also appeared near the top of privacy-invasiveness rankings. One 2025 analysis ranked it as the most invasive app in its sample, although rankings vary according to methodology.
5.TikTok — TikTok’s collection can include identifiers, contact information, location and other usage-related data. Recent comparisons have placed it among the apps collecting substantial amounts of user information.
6.Amazon Alexa — Voice assistants naturally require access to certain information to function, but Amazon Alexa was identified as the most data-hungry non-Meta app in Surfshark’s 2026 Big Tech study, declaring 28 data types.
7.Google Maps — Maps needs location information to provide navigation, but location can also reveal extremely detailed information about a person’s routines, workplaces and frequently visited places.
8.WhatsApp — Although its messages benefit from end-to-end encryption, the broader app ecosystem can still involve information such as identifiers, contacts and usage data. Privacy therefore involves more than simply asking whether messages are encrypted.
9.Pinterest — A 2025 App Privacy Index ranked Pinterest among its ten most invasive apps, citing the breadth of information it can collect for personalization and advertising.
10.Duolingo — Even educational apps can collect considerable amounts of information. Duolingo appeared in the same 2025 privacy ranking, illustrating that extensive data collection isn’t limited to social-media platforms.
Is Your Phone Really “Secretly” Tracking You?
The word “secretly” needs some qualification. These apps generally disclose their data practices through privacy policies and app-store privacy labels. The bigger problem is that users rarely read lengthy privacy policies or understand what individual permissions mean.
Data collection also doesn’t automatically mean an app is spying on you illegally. An app may collect information to provide a legitimate feature, improve performance, personalize content or deliver advertising. Importantly, app-store privacy labels describe categories developers say they collect; they do not necessarily measure how frequently information is collected or independently verify every disclosure.
The safest approach is to review app permissions regularly, disable unnecessary access to location, contacts and other sensitive information, and think carefully before granting permissions that an app doesn’t obviously need.
