Onavo was known for mobile data-management and compression tools before Facebook acquired the company in 2013. Its consumer VPN app later became the subject of public scrutiny because it routed users’ traffic through infrastructure associated with Facebook and provided the company with information about app usage. Facebook discontinued Onavo Protect in 2019. It should therefore be treated as a discontinued product, not a current recommendation for reducing mobile data use.

How compression tools worked
Some data-saving services reduce transferred bytes by routing traffic through an intermediary that can compress or optimize supported content. That design can affect privacy because the provider may process connection metadata or, depending on encryption and implementation, parts of the traffic. A VPN label alone does not mean a service prevents its operator from observing all meaningful information, nor does it prove that the provider’s practices meet a user’s needs.

Why Onavo drew attention
Reporting and public documents described Facebook’s use of Onavo data to understand how people used competing apps. The episode raised questions about informed consent, data collection and the difference between a product’s consumer-facing purpose and the business value of usage analytics. Readers should distinguish the documented history from broad claims about what the service could see in every connection; encryption and app behavior affect what is exposed.

Reduce data use with current device controls
Modern Android versions provide per-app data usage views and controls, though labels vary by manufacturer. Review which apps use background mobile data, disable background use where appropriate and download large media over trusted Wi-Fi. A carrier’s current plan tools can help identify unexpected consumption. Avoid installing an old APK or a similarly named app from an unofficial source.
For privacy tools, review the provider’s current ownership, data-retention policy, independent assessments and permission requests. Prefer a service with a clear business model and current documentation. Onavo’s history is a useful reminder that “data saving” and “privacy protection” are different promises. The app is discontinued, and this article does not recommend reinstalling it.