> ## Documentation Index
> Fetch the complete documentation index at: https://docs.contactsmanager.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Overview

> Explore the powerful features of ContactsManager SDK

ContactsManager SDK provides a comprehensive set of features designed to help developers build powerful, privacy-focused contact management and social experiences in their applications.

## Core Features

<CardGroup cols={2}>
  <Card title="Contacts Access" icon="address-book" href="/features/contacts-access">
    Securely access and manage device contacts with privacy as the top priority
  </Card>

  <Card title="Contacts Search" icon="magnifying-glass" href="/features/contacts-search">
    Powerful search capabilities that work across all contact fields
  </Card>

  <Card title="Social Features" icon="share-nodes" href="/features/social-features">
    Build engaging social experiences while protecting user privacy
  </Card>

  <Card title="Friend Recommendations" icon="user-plus" href="/features/friend-recommendations">
    Intelligent recommendations without compromising contact data
  </Card>

  <Card title="Offline Functionality" icon="wifi-slash" href="/features/offline-functionality">
    Seamless operation even without internet connectivity
  </Card>

  <Card title="Privacy By Design" icon="shield" href="/features/privacy-by-design">
    Privacy by design principles
  </Card>

  <Card title="Spam Filtering" icon="filter" href="/features/spam-filtering">
    Intelligent SPAM filtering for clean contact recommendations
  </Card>
</CardGroup>

## Privacy by Design

All features in ContactsManager SDK are built with privacy as the foundation. We believe that users should have complete control over their contact data, and applications should be able to provide rich features without compromising privacy.

Some key privacy principles that guide our development:

* **Local Processing**: Contact data stays on the user's device
* **Encrypted Storage**: Military-grade encryption for all sensitive data
* **Transparent Control**: Users always know what data is being used and how
* **Minimal Data Collection**: Only essential data is processed for each feature
* **Zero Server Access**: Neither your servers nor ContactsManager's servers ever access raw contact data
* **User Sovereignty**: The user remains in full control of their data at all times

## Cross-Platform Support

ContactsManager SDK provides consistent experiences across:

* iOS
* Android
* Web

This ensures your users have the same privacy-focused experience regardless of the platform they use.

Visit [contactsmanager.io](https://contactsmanager.io) to learn more about our approach to privacy and how we can help you build better contact experiences in your application.