Mobile app security best practices: a checklist for app owners

The OWASP Mobile Application Security project covers technical areas such as storage, cryptography, authentication, network communication and resistance to reverse engineering. App owners usually work at another level: access, enabled features, connected services and change management.

Security, privacy and compliance overlap, but they answer different questions:

An app can describe its data practices accurately and still grant access too broadly. Store approval is not a security certificate. This guide provides an operational baseline; sensitive data, regulated processes or substantial custom code may require a qualified assessment.

Shared responsibility becomes easier to manage when it is explicit.

GoodBarber reduces the infrastructure and native-engine work an app owner would otherwise assemble. The organization still decides who needs access, which sections are private and what external services do with the data they receive.

Identify what you are protecting. A public news app does not have the same risk profile as a school app with staff documents or a commerce app with customer information.

Make a short inventory of five things:

• People: administrators, editors, members, subscribers, customers and external providers.
• Private areas: restricted sections, profiles, internal documents and unpublished content.
• Data: account details, messages, form submissions, uploads, location and transaction information.
• Connections: embedded pages, analytics, advertising, social sign-in, automation tools, custom feeds and APIs.
• Critical accounts: the app back office, domain provider, store consoles and external services.

For each item, ask: what would happen if the wrong person could view it, change it or stop it from working? This gives the highest-risk decisions attention first.

The fastest route into an app project may be an old account with more permissions than its owner needs. Give each collaborator an individual account. Shared credentials make it difficult to remove one person, attribute a change or know who still has access. Use a unique password stored in a password manager for every critical account, and enable multi-factor authentication wherever it is available.

Depending on the plan, GoodBarber lets the project owner add back-office team members as Administrators or Users, then customize access to content, users, audience and individual CMS sections. Use the editorial team permissions to apply a simple rule: grant the minimum access required for the person's current work.

Apply the same discipline outside GoodBarber. Apple separates App Store Connect responsibilities into roles and requires two-step verification or two-factor authentication for sign-in. Google recommends 2-Step Verification for every account with Play Console access. Remove former collaborators, reduce obsolete permissions, review recovery methods and confirm that the organization—not an unavailable contractor—controls the owner accounts.

Authentication answers who is this person? Authorization answers what may this person access? A working login does not prove that the access rules behind it are correct.

With GoodBarber's Authentication extension, the whole app or selected sections can require sign-in. The User Groups extension then lets the publisher grant selected groups access to private sections.

Consider a school app with shared news, a parent area and staff documents. Creating three groups is only the configuration step. The security check is to test the resulting app as:

• a visitor without an account;
• a registered parent;
• a staff member;
• a valid user assigned to the wrong group.

Try more than the menu. Open a direct link, a push-notification destination and an old bookmark to the restricted section. Test denied access as deliberately as successful access. For users already signed in, group-right changes can take up to 24 hours to apply; repeat the tests after that window.

If the app uses Memberships instead, test subscriber and non-subscriber access, including preview content. GoodBarber Memberships is incompatible with Authentication and User Groups: they are alternative access architectures. Test the workflow that applies to your app, and keep its rules easy to explain.

Every enabled feature adds behavior; some add device permissions or third-party components. Follow the principle of least privilege: request only the access required for a feature the app actually uses.

GoodBarber's Privacy Center inventories permissions associated with the app configuration. The platform also describes a conditional approach to embedded libraries: a component is included when its corresponding feature is enabled and removed on recompilation when the feature is disabled. That reduces unnecessary code at the platform level, but the app owner still decides which features belong in the project.

Check that each permission supports a visible feature, remove obsolete analytics, advertising or social services, and determine whether a disabled feature requires a new native build before its component disappears. Then use the separate mobile app privacy checklist to align the privacy policy and store declarations. Privacy consistency supports security work; it does not replace it.

The clearest boundary appears when the app opens something GoodBarber did not build: a website, form provider, custom JavaScript, API, automation or partner system.

For every external surface, record its owner and verify:

• the URL uses HTTPS and points to the intended domain;
• access to its administration account is still appropriate;
• no confidential key or token is embedded in client-side code; any client-visible API key is intended for public use and restricted as tightly as its provider permits;
• collected information goes only to the expected destination;
• the provider, plugin or script is still maintained and the connection can be revoked.

For business-critical content and services, document what can be exported, how access can be restored and what the organization will do if a connected provider becomes unavailable.

HTTPS protects data in transit. It does not prove that the destination handles data safely, that its access rights are correct or that its code is free from vulnerabilities.

GoodBarber automatically provides SSL certificates for the default PWA domain and for connected custom domains. The HTTPS documentation also makes the boundary clear: a platform certificate secures the GoodBarber-managed web address. Check every external endpoint separately.

The same boundary applies to custom development. GoodBarber supports custom code sections, widgets, navigation and APIs, but its custom code documentation states that the publisher is responsible for external code. Have code that processes sensitive information or critical business logic reviewed by someone qualified.

Not every change reaches an installed native app in the same way. Content can update automatically, some settings must be published, and a new feature or native-engine change may require a new build. Review the update panel after adding or removing a feature and test the ad hoc build before submission when recompilation is required. The native app update guide explains each path; our dedicated article covers what quietly breaks when an app is not updated.

Keep a small verification record for important controls:

The record prevents “we checked that once” from becoming the permanent security process.

An incident plan can be one page. Identify who owns the app and store accounts, who can change the configuration and which providers to contact.

Define the first actions in advance:

1. Preserve the facts: what was observed, when and by whom.
2. Revoke the affected user or administrator access.
3. Rotate exposed credentials, tokens or keys, and disable the affected connection if that reduces harm.
4. Contact GoodBarber support when the project or managed platform may be involved.
5. Ask qualified advisers whether users, authorities, stores or partners must be informed.

GoodBarber documents its platform-level security and backup measures in its Data Processing Agreement. Do not assume that they cover a custom system or third-party provider.

Use this final check to surface actions quickly.

• Every back-office collaborator still needs an account and its current permissions.
• Apple, Google, domain and external-service accounts have current owners and strong sign-in protection.
• Public, authenticated and restricted access has been tested with separate accounts.
• Every enabled permission supports a feature that is still used.
• External pages, forms, analytics, automations and custom code have an identified owner.
• Each external destination uses HTTPS and the expected domain.
• No confidential credential is embedded in client-side custom code; public API keys are appropriately restricted.
• The update panel and current store versions have been reviewed.
• A named person owns incident coordination and can revoke critical access.
• The date, reviewer and evidence for this check have been recorded.

Any failed item becomes an action with an owner and a deadline. For a sensitive or highly customized app, the next action may be an independent technical assessment rather than another settings review.

Create your app, define its access rules and review its security baseline

How do you secure a mobile app?

Start by listing the app's critical accounts, private areas, data and connected services. Restrict administrative access, test authentication and authorization with several profiles, remove unnecessary permissions, review external code and providers, keep the published app current and prepare an incident contact plan. Technical testing should be proportionate to the app's sensitivity and degree of customization.

Is a no-code app less secure than a custom-developed app?

Not inherently. A managed app builder can standardize infrastructure, compilation and common components. Custom development offers more control but makes the team responsible for more code, services and maintenance. Security depends on the platform, configuration, connected services and verification. Our article on the limitations of no-code app builders examines the trade-off.

Does GoodBarber secure everything in my app?

No platform can secure choices and services it does not control. GoodBarber manages its platform infrastructure and app engine and provides controls for team access, authentication, groups, permissions and HTTPS. The app owner configures those controls and remains responsible for external pages, custom code, connected providers and project-specific requirements.

Do I need a professional mobile app security test?

Possibly. Seek specialist review for highly sensitive or regulated information, substantial custom code, critical external systems or workflows whose misuse could cause significant harm. This checklist is not a penetration test or certification.