Your Contacts,
Intelligently Secured.
ContactForge V4.2.0 is a privacy-first Android app that cleans duplicates, edits your contacts, tracks relationships, and syncs securely to your phone—fully offline, zero cloud, zero tracking.
The Local-First Engine
Organize your contacts easily and safely. No internet uploads, no data selling, and no confusing algorithms.
Tinder for Duplicates
Just swipe right to merge matching contacts, or left to keep them separate. It's fast, fun, and clearly explains exactly why it thinks two contacts are the same person.
Smart & Reliable Matching
We use clear, reliable rules to find duplicates—like matching identical phone numbers or emails. No unpredictable AI, just straightforward logic you can trust.
100% Private & Secure
Everything happens directly on your phone. Your private contact list is never uploaded to the internet or stored on our servers.
Clear Merge Previews
Before combining contacts, we show you exactly what the final result will look like. We hide empty fields so it's clean and easy to read.
Safe Undo Button
Made a mistake? No problem. The app takes a safe backup right before merging, so you can easily undo any action with a single tap.
The Journey to V4
The Complete CRM
2-Way Native OS Write-Back Sync, Full CRM Editing, Shake-to-Undo, Single Contact Sharing, and FlashList Virtualization.
Hover to view V4 highlights...
Contact Intelligence
Dealing with massive contact duplicates manually is tedious, opaque, and error-prone.
Gesture-driven flashcard review, SQL-optimised duplicate engine, smart merge preview, and actionable dashboard metrics. Beta APK available now.
Hover to reveal the architecture shift...
Data & Sync Foundation
Syncing contacts to the cloud quietly uploads private data to third parties, risking data harvesting.
Manual WebDAV sync transport, encrypted local backups, Import Studio with CSV/VCF ingestion, and a safe undo-engine for all merges.
Hover to reveal the architecture shift...
The Local Mirror
Default contact apps lack privacy controls and act as impenetrable black boxes.
Established the offline-first SQLite mirror engine tracking native device contacts with zero cloud dependency.
Hover to reveal the architecture shift...
Direct Distribution
How to Install the APK
ContactForge is distributed directly to guarantee zero third-party tracking. Follow these 3 simple steps to install it on your Android device.
Download
Tap the download button to grab the latest APK file directly from our secure GitHub release pipeline.
Allow Install
Open the file. If prompted, tap Settings and enable "Allow from this source" for your browser or file manager.
Start Locally
Launch ContactForge. It works instantly, 100% offline. No accounts, no cloud syncs, no tracking.
Common Questions
Why isn't this on the Google Play Store?
We distribute directly to guarantee zero third-party tracking policies. We don't want to embed the required store analytics SDKs into an app designed for absolute privacy.
Does ContactForge need internet access?
No. The app operates completely offline. It reads your local device contacts, processes them in a local SQLite database, and saves them back to your device.
Will this upload my contacts anywhere?
Never. Your contacts stay exactly where they belong: on your device.
THE ARCHITECT
Shivansh Mishra
Aspiring ML Engineer. Forged by Vibe Coding.
I built ContactForge through excellent thinking and pure intuition. A solo developer engineering the local-first revolution, driven by a passion for Python, C, and SQL.