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A strong mobile app does not need every possible feature. It needs a clear way to complete its main task, a usable and accessible interface, and safeguards that fit the data it handles. Treat the checklist below as a set of design and engineering decisions—not a requirement to add all 15 items to every app.
Start with the task, not a feature count
Before choosing features, define what users come to do and what information the app needs to do it. A local-first utility, a public information app, and a finance app have different requirements. Prioritize capabilities that make the core task easier, safer, or more reliable, and leave out those that add friction without serving a real need.
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For interface decisions, use the conventions and guidance for each target platform rather than making iOS and Android screens identical by default. Apple’s Human Interface Guidelines and Google’s Android design guidance are useful starting points.
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1. Clear navigation and a focused core flow
Users should be able to tell where they are and how to complete the app’s main job. Keep the primary path easy to find, label controls plainly, and avoid unnecessary steps between opening the app and reaching its central value.
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2. An accessible interface
Make accessibility part of design and testing, not a late-stage polish task. Check that the interface works with the platform’s accessibility features and remains understandable across different ways of seeing, hearing, and interacting. The guidance cited here does not establish specific conformance criteria, so assess the app against the standards and requirements applicable to its product and markets.
3. Onboarding that explains what matters
Introduce the app’s purpose and essential controls when users need that information. Avoid long tours that delay the core task, and do not request data access before the user reaches the feature that needs it.
4. Search and filters when content warrants them
Search and filtering help when an app contains substantial or structured material, such as a catalog or a large set of records. They are unnecessary for a simple utility with only a few obvious actions.
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Require an account only when it supports a real need, such as keeping a user’s data across devices or protecting access to a personal service. If authentication is needed, consider established platform-supported options rather than creating a custom sign-in scheme. Apple’s Human Interface Guidelines discusses system authentication options, while Android’s privacy and security guidance covers privacy-conscious app design.
6. Clear privacy disclosures and controls
Tell users what information the app collects and why, and collect only what its features require. Consider whether processing can happen on the device instead of sending information elsewhere. Give users meaningful control over access to their data. Apple’s App privacy details guidance covers data practices and disclosure.
7. Secure data and sessions
Security is a system of practices, not a single setting. Use server-side authorization, protect session tokens, encrypt sensitive information at rest and in transit, and use HTTPS for network connections. Do not store passwords on the device. The OWASP Mobile Application Security Cheat Sheet is a starting point; the review should match the app’s risk.
8. Permissions requested in context
Ask for access—such as location, camera, or contacts—when a user invokes the feature that needs it. Explain the reason in plain language and preserve useful functionality when permission is denied, where feasible. Apple’s privacy guidance and Android’s safety guidance both emphasize limiting access to what a feature needs.
9. Relevant, controllable notifications
Use notifications for events users are likely to consider important, such as a time-sensitive task or account security activity. Let users control notification preferences and avoid making promotional pushes the default reason to enable them. OWASP recommends notifying users about security-related activity, including a login from a new device, in its mobile security guidance.
10. Useful behavior on weak or absent networks
Decide which core tasks can still work when connectivity is poor or unavailable. If the app cannot complete an action or sync data, explain what happened and what the user can do next. Offline support is a product choice, not a universal platform requirement.
11. Sync and backup when continuity matters
For apps that hold important or user-created information, plan how data stays consistent across devices and how it can be recovered. Keep the scope aligned with the app’s purpose and privacy model; some tools work better by keeping data local rather than syncing it.
12. A clear support and feedback route
Provide a straightforward way to report a problem, ask for help, or share feedback. Make it possible to identify the relevant screen or issue without asking users to send more personal information than support needs.
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Measure only what serves a defined product or reliability goal, and make disclosures match what the app actually collects and uses. Google Play’s Data safety guidance includes analytics-related data uses such as usage, app health, crash diagnosis, and performance improvement.
14. Performance and reliability
Keep the main flow responsive and handle errors without losing user work. Validate inputs and outputs, test security controls, and monitor failures so teams can find and fix problems. OWASP recommends validation, automated security testing, and usability testing of security features in its mobile security cheat sheet.
15. Maintained software and release readiness
Plan to update dependencies, fix defects, and respond to security issues after launch. Store review and users’ update timing can delay the arrival of fixes, so releases need ongoing maintenance rather than a one-time launch checklist. Check the current platform review and disclosure guidance before shipping; Apple’s App Review Guidelines and Google Play’s Data safety guidance are relevant references.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Which features should you prioritize?
There is no universal ranking that fits every mobile app. Use these questions to decide what belongs in the first release and what can wait:
- Does it support the core task? Favor features that help users complete the app’s main job.
- What data does it need? The more sensitive or extensive the data, the more important minimization, access controls, and careful handling become.
- What happens when connectivity fails? If interruption could block an important task or risk user data, consider offline behavior, recovery, or clear sync status.
- Can users control it accessibly? Consider accessibility needs and whether users can make meaningful choices about permissions, notifications, and data.
- What differs by platform or distribution channel? Account for platform behavior, design conventions, review processes, and disclosure requirements.
- Can the team maintain it? Include implementation effort, support burden, security upkeep, and long-term maintenance in the decision.
What should every mobile app have?
Every app benefits from a clear core task, usable navigation, accessibility-minded design, appropriate privacy practices, and a plan for reliability and maintenance. Capabilities such as accounts, precise location, push notifications, payments, search, syncing, and offline access should be added only when they serve the app’s purpose.
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