Android App Security Checklist Before Google Play Launch

1. Map sensitive data and user roles

Start with a plain list, not tools. What does the app collect?

• email, phone, name and address;
• payment state, order history or delivery location;
• photos, files or messages;
• health, wellness or identity information;
• admin notes, support actions or provider earnings.

Then map who can see or change each item: user, provider, support manager, admin, courier, doctor, teacher, seller or finance role. A common mistake is to hide a button in the app but still allow the API to return or change data for the wrong user. Server-side checks matter more than interface hiding.

2. Remove secrets from the app package

Anything shipped in an Android app can be inspected. Do not put private API keys, admin tokens, payment secrets, database credentials or signing secrets inside the app.

Safe patterns:

• keep payment and privileged operations on the backend;
• use short-lived tokens where possible;
• treat public SDK keys as public;
• rotate exposed keys quickly;
• check release builds for debug endpoints and test flags.

This is one of the highest-value checks because it prevents a very ordinary launch mistake.

3. Minimize permissions

Android users notice permission prompts, and Google Play also cares about sensitive permission use. Ask for the minimum required permission, request it at the moment it is needed, and explain the benefit in normal language.

Review:

• location access: precise vs approximate, foreground vs background;
• camera and media access;
• contacts and calendar access;
• notification permission;
• microphone and Bluetooth;
• special permissions that require stronger justification.

If a feature can work without a sensitive permission in the MVP, avoid it. Excessive permissions reduce trust and may complicate review.

4. Protect local storage

Do not store sensitive data locally unless the product needs it. If local data is required, use platform-appropriate secure storage, avoid saving tokens in plain text and define what happens on logout.

Check:

• tokens are not stored in simple files;
• cached private content is limited;
• screenshots or logs do not expose private screens;
• logout clears sensitive local state;
• backups do not include data they should not include.

For healthcare, private chat and financial workflows, local storage rules should be discussed before development, not after release.

5. Secure network and backend access

The backend must enforce permissions on every request. The Android app should never be the only place where business rules live.

Review:

• HTTPS is required for API traffic;
• users can access only their own records;
• provider/admin roles are checked server-side;
• rate limits exist for risky actions;
• file uploads are validated;
• payment state is verified on the server;
• error messages do not leak private details.

For marketplaces and delivery apps, pay special attention to order ownership, address visibility and provider actions.

6. Check authentication and recovery

Authentication includes sign-up, login, social login, password reset, account deletion, session expiry and support recovery.

A simple MVP can use a proven authentication provider. Higher-risk apps may need stronger recovery rules, device change checks, multi-factor options or step-up verification for sensitive actions.

If the app includes private chat, medical notes, payments or admin access, do not leave account recovery as an afterthought.

7. Review SDKs, logs and analytics

Third-party SDKs can collect data, add permissions, affect performance and change store disclosures. Keep only what is needed for the product.

Before release:

• remove unused SDKs;
• check SDK privacy requirements;
• confirm analytics events do not include private text, tokens or personal data;
• review crash logs for sensitive values;
• turn off verbose debug logs in release builds.

Analytics should help the team improve the product without turning private data into tracking noise.

8. Use Play Integrity where risk justifies it

Google's Android guidance points developers to tools such as Play Integrity API and Credential Manager for stronger protection and safer sign-in patterns. Not every MVP needs the same setup, but apps with payments, abuse risk, marketplace activity or paid content should at least discuss integrity checks.

Use integrity signals as one input, not as a magic wall. The backend still needs clear permission checks and monitoring.

9. Test the real release build

Debug builds can hide problems. Test the signed release build that will go to Google Play.

Run through:

• first install and first login;
• password reset or social login;
• permission prompts;
• checkout, booking or order flow;
• logout and account deletion;
• offline or slow-network states;
• crash reporting and analytics;
• admin/support actions if they affect Android users.

Google has also been adding more developer-facing warnings and policy insights around common issues, so it is better to catch them before submission.

Cost and scope planning

Security effort depends on the app's data and workflows. A content MVP has a different scope from a delivery app, healthcare platform, private chat or marketplace with payouts.

At Appfyl, a focused MVP usually starts around 15,000-25,000 USD. Solid mid-sized products often sit around 25,000-55,000 USD. Larger apps with payments, multiple roles, admin panels, compliance-sensitive data, monitoring and deeper testing can reach 55,000-115,000 USD.

Security is one reason we estimate by workflows and risks, not only by screen count. You can outline those workflows in the Appfyl estimate brief.

How Appfyl approaches Android security

We keep the first version practical. For a founder, the goal is not to buy every security tool. The goal is to avoid mistakes that are expensive after launch.

We usually review:

• sensitive data and user roles;
• backend permission checks;
• app permissions and local storage;
• payment or booking state;
• analytics and logs;
• real release build behavior before store upload.

For healthcare, payment-heavy or private communication products, we recommend a deeper security and compliance review before launch.

Want to see how Appfyl turns scope into shipped products? View Appfyl cases.

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