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Mobile App - Custom Development Service for Module 9: API Integration & Local Storage

Feature goal: Ensure stable data exchange between the app and external APIs, as well as implement reliable local storage for offline mode and caching

(4.6)
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🎉 Price from: $195.5 ($230)

You save: $34.5 (15%)

Rates: Junior $8–$12/h | Middle $20–$25/h | Senior $30–$40/h

Hire Developer

Timeline: 2-4 days

What’s included:

  • Connecting REST / GraphQL API client
  • Handling authentication, headers, and access tokens
  • Managing different states (loading / success / error)
  • Implementing offline cache (SQLite, Realm, MMKV, AsyncStorage)
  • Saving key data (profile, lists, orders, etc.)
  • Update and sync logic upon reconnection
  • Request queue with retry mechanism
  • Data version check on load
  • Sync indicators in UI

Testing (available at extra cost):

  • Verifying stability of API integration (including rate limits and errors)
  • Testing offline mode and data recovery
  • Behavior under connection loss and resynchronization
  • Edge cases: expired tokens, data version conflicts, timeouts

Additionally (available at extra cost):

  • Support for multiple APIs with priority management
  • Integration with Firebase, Supabase, Strapi, Airtable, etc.
  • Storage of user drafts and local preferences
  • Encryption of sensitive data at rest
  • API integration documentation for support and scaling

Work examples

mobile screen showing API client setup with authentication token input

Frequently Asked Questions

How does the module work?

After you choose the API Integration & Local Storage module, you specify which API should be connected and what data must be stored offline. A developer sets up integration, caching, and synchronization logic tailored to your app.

Who does the work?

Certified freelancers (Junior, Middle, or Senior levels) implement the module. You select the level of expertise that matches your budget and deadlines.

What will I receive?

A fully functional API integration and offline storage setup - including secure token handling, request retries, local caching, and UI sync indicators. Your app will work smoothly online and offline.

Can I customize the module?

Yes. You can define which APIs to integrate, what data to cache, and how the sync behavior should work (real-time, queued, or manual). Encryption, drafts, or multiple API setups are also available as extras.

What if I need help defining my requirements?

Our AI Product Manager Assistant will guide you through the options, helping you clarify API details, caching needs, and offline scenarios so the developer can start right away.

About this offer

Suitable for mobile apps, SaaS products, marketplaces, and startups that require reliable data flow and offline-first capabilities. This module covers API integration, token management, and secure local storage - ensuring smooth performance even without internet. Built for scalability, responsive UI updates, and edge-case handling. Common clients: fintech apps, delivery services, eLearning platforms, B2B tools, and MVP-stage startups. Supports multiple APIs, offline caching, and encrypted data handling.

Join for Early Access

⚡ Limited offer — only before public launch.

🎉 Early Supporter Deal

Get pre-launch access to the AI Product Manager Assistant and save:

  • –25% $11/month $14.99/month
  • –45% $99/year $180/year
  • Help shape the tool, get exclusive benefits, and be the first to try it.
  • "Private beta access" или "Direct feedback loop with the team"
Buy with discount $11/month Buy with discount $99/year

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Customers say

Clients value this module for making their apps more reliable and user-friendly, especially in unstable network conditions. They highlight the seamless offline mode, fast synchronization, and secure handling of sensitive data. Many noted that the retry queue and sync indicators greatly improved user trust, while encrypted local storage added peace of mind. Several clients shared that this module helped them scale faster by integrating multiple APIs with minimal downtime. They also appreciate the clear developer documentation and the flexibility to adapt caching rules to their business needs.