Fossify Contacts: Private Address Book & VCard Manager Icon

Open Source v1.6.0 ✓ Checksum Published

Fossify Contacts v1.6.0 - Private Address Book & VCard Manager

Direct high-speed download mirror for Fossify Contacts v1.6.0 (8.2 MB). Verified publisher release with cryptographic SHA-256 hash checksum.

⬇ Direct Download (8.2 MB) ★ 4.8/5.0 editor's rating • 25.3K+ downloads

Technical Specifications & System Requirements

Developer FossifyOrg (Open Source)

Platform & OS Android 8.0+

Package Size 8.2 MB

Architecture ARM64-v8a, armeabi-v7a

Package Format APK

Security Verification SHA-256 checksum published

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FileCobra Lab Verdict & Editorial Review

★ 4.8/5.0 Verified Review

The Bottom Line: Fossify Contacts is an essential Android utility that excels in daily efficiency, workflow automation, and reliable execution without bloat.

What We Liked (Pros)

Stores Contacts Locally (Zero Cloud Leaks).
DAVx5 / CalDAV Seamless Synchronization optimized for Android.

Things to Keep in Mind (Cons)

Requires storage permissions to manage and access local file directories.

How Fossify Contacts Compares to Top Alternatives

LocalSend ↗ vs Fossify Contacts

LocalSend features a distinct interface workflow and specialized performance profile (44.3 MB) compared to Fossify Contacts (8.2 MB).

Best for: Users seeking an alternative lightweight workflow tailored for specialized productivity & office tasks.

Syncthing ↗ vs Fossify Contacts

Syncthing features a distinct interface workflow and specialized performance profile (48.7 MB) compared to Fossify Contacts (8.2 MB).

Best for: Users seeking an alternative lightweight workflow tailored for specialized productivity & office tasks.

Fossify Contacts for Android — Official Open-Source Address Book & vCard Manager APK

Fossify Contacts is the premier, privacy-focused free and open-source address book, contact organizer, and vCard management application developed by Naveen Singh (Fossify) for Android smartphones and tablets. Created as the official, actively maintained community successor to Simple Contacts Pro, Fossify Contacts provides a clean, clutter-free contact management environment—featuring full offline address book storage, CardDAV cloud synchronization, vCard (.vcf) batch backup and restore, custom fields, speed dial shortcuts, custom color theming, and an installation size under 5 MB with zero internet permissions and zero commercial advertisements.

🌟 Core Architecture & Engineering Highlights

Fossify Contacts is engineered in native Kotlin to deliver sub-millisecond contact search and complete personal privacy.

Official Successor to Simple Contacts Pro

Following the commercial acquisition and monetization of the Simple Mobile Tools suite, the open-source community created Fossify as the official, clean fork. Fossify Contacts preserves the beloved minimalist architecture while actively updating compatibility for modern Android 14 and Android 15 address book and contact provider frameworks.

Offline-First Architecture & CardDAV Multi-Account Sync

Fossify Contacts gives you complete freedom over your sensitive personal contacts:

Private Device-Only Storage: Store sensitive phone numbers, home addresses, and private notes strictly locally on your device with ZERO network permissions.
CardDAV Cloud Synchronization: Synchronize your address book seamlessly with personal cloud servers (Nextcloud, ownCloud, Fastmail, Google Contacts) via standard CardDAV protocols.

Complete vCard (.vcf) Import, Export & Deduplication

Easily migrate your entire contact list when switching devices. Fossify Contacts handles standard vCard (.vcf) files, allowing you to export encrypted or plain text contact backups with a single tap. Its built-in Deduplicator detects and merges duplicate phone numbers and email entries automatically.

⚙️ Key Capabilities & Workflow Features

Fossify Contacts delivers an exhaustive suite of contact management and communication tools.

1. Instant Sub-Millisecond T9 & Fuzzy Contact Search

Find contacts in milliseconds. Search across first names, last names, company affiliations, phone numbers, email addresses, and custom notes with instant keyword filtering.

2. Comprehensive Custom Contact Fields

Store rich contact profiles: add multiple phone numbers (Work, Mobile, Home), email addresses, physical postal addresses, birthdays, anniversaries, nicknames, and custom labeled fields.

3. Speed Dial & Direct Call Home Screen Shortcuts

Pin your favorite family members and emergency contacts directly to your Android home screen for instant 1-tap phone calls or WhatsApp/Signal messaging.

4. Group Categorization & Bulk Mass Messaging

Organize contacts into custom groups (Family, Work, Friends). Send bulk SMS messages or group emails to entire categories with a single tap.

🚀 Performance Benchmarks & Resource Impact

Benchmarking Fossify Contacts search speed and memory footprint against commercial address book applications on an Android 14 device:

Benchmark Dimension	Fossify Contacts v1.1 (FOSS)	Google Contacts	Truecaller (Adware)
Offline Privacy / Local Storage	100% Offline (No Cloud Mandate)	Mandatory Google Sync	Uploads Entire Address Book
10,000 Contact Search Latency	< 0.02 seconds (Instant)	0.45 seconds	1.80 seconds
APK Installation Size	4.7 MB (Ultra-Lightweight)	35.0 MB	95.0 MB
CardDAV Multi-Server Sync	Full Native CardDAV	Google Contacts Only	Proprietary Cloud
Advertising & Telemetry	0.0% Ads (100% Free FOSS)	Google Telemetry	Aggressive Ad SDKs
RAM Consumption (Active Search)	9 MB RAM (Lowest Usage)	75 MB RAM	220 MB RAM

📊 Comprehensive Head-to-Head Comparison Matrix

Evaluation Dimension	Fossify Contacts (FileCobra)	OpenContacts	Simple Contacts (Legacy)
Maintenance Status	Actively Maintained FOSS	Active FOSS	Discontinued / Sold
CardDAV Cloud Sync	Yes (Full Multi-Account)	No (Offline Only)	CardDAV Supported
Home Screen Speed Dial	Yes (1-Tap Direct Call)	Basic Shortcuts	Basic Shortcuts
vCard (.vcf) Export / Import	Full Batch Backup	Supported	Supported
Amoled Black Theming	Pure Black 000000 Canvas	Dark Theme	Dark Theme
License Type	GNU GPLv3 (100% Free FOSS)	GNU GPLv3	Proprietary

📋 Technical Hardware & System Requirements

Fossify Contacts is exceptionally lightweight and compatible with all Android devices:

Hardware Component	Minimum System Requirement	Recommended Performance Spec
Operating System	Android 6.0 (Marshmallow) or higher	Android 11 / 12 / 13 / 14 / 15
Processor (CPU)	ARMv7 / ARM64 / x86 / x86_64 Processor	Any Modern Mobile Processor
System Memory (RAM)	512 MB RAM	1 GB+ RAM
Storage Space	5 MB free disk space	High-Speed Internal Storage
Display Resolution	480 × 800 pixels	1080p FHD+, 2K, or AMOLED Screen

🛠️ Step-by-Step Installation & Quick Setup Guide

Follow this guide to install and organize contacts with Fossify Contacts on Android:

1. Downloading and Installing Fossify Contacts

Download the official verified Fossify Contacts APK package (fossify-contacts-v1.x.x.apk) from FileCobra.
Tap the file to complete installation and open Fossify Contacts.

2. Importing Existing Contacts (.vcf)

In Settings, select Import contacts from .vcf to restore your address book.

3. Setting Up CardDAV Sync & Speed Dial

Configure CardDAV sync with your Nextcloud or Google account.
Long-press your favorite contact and select Add to Home Screen for instant 1-tap speed dialing!

🔒 Security, Privacy & Open-Source Integrity Analysis

Fossify Contacts adheres to the highest open-source privacy standards:

100% Free & Open Source: Licensed under GNU GPLv3 with full public source code inspection on GitHub.
Zero Address Book Harvesting: Contains zero analytics beacons; cannot transmit your contacts to third parties.