GDPR applies to any app that processes data of EU residents — regardless of where you're based. This practical guide covers what you need to know and do.

The General Data Protection Regulation (GDPR) is one of the most comprehensive privacy laws in the world. If your mobile app is available in the EU — or if any EU resident can download it — GDPR applies to you, regardless of where your company is based.

Does GDPR Apply to Your App?

GDPR applies if your app:

Is available to users in the European Union or European Economic Area
Processes personal data of EU residents
Monitors the behavior of EU residents (e.g., analytics, tracking)

Personal data includes any information that can identify a person: name, email, IP address, device ID, location, and even behavioral data.

The Six Lawful Bases for Processing

Under GDPR, you must have a valid legal basis for every type of data processing. The six bases are:

Consent — The user has given clear, affirmative consent
Contract — Processing is necessary to fulfill a contract with the user
Legal obligation — Processing is required by law
Vital interests — Processing is necessary to protect someone's life
Public task — Processing is necessary for a public interest task
Legitimate interests — Processing is necessary for your legitimate business interests

For most consumer apps, consent is the primary basis. This means you need a proper consent mechanism — a pre-ticked checkbox does not constitute valid consent.

User Rights Under GDPR

Your privacy policy must explain how users can exercise these rights:

Right of access: Users can request a copy of their data
Right to rectification: Users can correct inaccurate data
Right to erasure ("right to be forgotten"): Users can request deletion
Right to data portability: Users can receive their data in a machine-readable format
Right to object: Users can object to certain types of processing
Right to restrict processing: Users can limit how their data is used

Data Breach Notification

Under GDPR, you must notify the relevant supervisory authority within 72 hours of becoming aware of a data breach that poses a risk to individuals. If the breach is high-risk, you must also notify affected users.

Practical Steps for Compliance

Audit your data flows: Map every piece of data your app collects, where it goes, and who has access.

Update your privacy policy: Your policy must be clear, concise, and written in plain language. Avoid legal jargon.

Implement consent management: Use a proper consent management platform (CMP) for cookies and tracking.

Appoint a Data Protection Officer (DPO): Required if you process large amounts of sensitive data.

Review your third-party SDKs: Every SDK that processes user data makes you a data controller. Ensure each has a Data Processing Agreement (DPA).

Penalties for Non-Compliance

GDPR fines can reach up to €20 million or 4% of annual global turnover — whichever is higher. More commonly, regulators issue warnings and require corrective action.

Generate a GDPR-Compliant Privacy Policy

PrivacyPolicyGen.io generates privacy policies that include all required GDPR disclosures, tailored to your specific app and jurisdiction.

GDPR Compliance for Mobile App Developers: A Practical Guide