We understand that a complete operating system cannot do without practical basic tools. PlugOS comes with a series of built-in applications such as browser, gallery, input method, file manager, and more. These core tools have been deeply customized and optimized to provide users with efficient, simple, and reliable daily support.

Unlike conventional system apps, all PlugOS pre-installed applicaiton tools:

• Collect no user data
• Upload no behavioral information
• Contain no third-party advertisements
• Perform no background data analysis

Veil Private Browser

Veil is PlugOS’s built-in secure browser, designed to prevent web tracking, isolate attack paths, and enhance browsing privacy. It is based on Chromium and incorporates excellent patches from the Vanadium open-source project, further improved and hardened to meet PlugOS’s requirements for data protection and isolation. By default, it disables almost all exploitable “functional vulnerabilities,” removes all Google service dependencies, integrates multiple security hardening technologies, and enables strong privacy protection options by default—delivering a truly no collection, no tracking, no disturbance browsing experience.

Key Features

• Privacy-first, completely removed Google service dependencies:
  • Removed all Google data connections: no connection to SafeBrowse, predictive services, crash reports, ads, etc., eliminating data uploads to Google servers.
  • Localized feature replacements: e.g., native Android autofill and credential manager without Google Play dependencies.
• System-level security hardening:
  • Memory safety enhancements: control-flow integrity (CFI), strong stack protector, automatic variable zero-initialization, explicit signed overflow handling, preventing memory corruption and code injection.
  • Strict sandboxing: stronger isolation between components (renderer, plugins, etc.) to minimize the impact of vulnerabilities.
  • Block dynamic code execution: JavaScript JIT (Just-In-Time compilation) is disabled by default to reduce attack surface.
• Anti-fingerprinting & privacy protection:
  • User agent reduction: replaces device model, OS, and browser version with generic placeholders.
  • Client hint reduction: replaces high-entropy hints with standard placeholders, preventing server-side device profiling.
  • Default privacy settings: disables third-party cookies, payment APIs, background sync, sensor access, etc.
  • WebRTC IP policy: configured for maximum privacy to prevent IP leaks.

Veil Browser is PlugOS’s customized solution for users who pursue ultimate browsing privacy and security. It operates fully locally, with no syncing, no account integration, and no external service connections—ensuring freedom and safety in the digital world.

Siyu Input Method

In today’s digital world, most input methods rely on cloud services to improve accuracy and update dictionaries—usually at the cost of collecting and uploading every keystroke. PlugOS disrupts this paradigm with Siyu Input Method (Siyu Ime), a fully offline, ad-free, and tracking-free keyboard developed on the Rime engine, designed for maximum privacy.

Core Functions

• Multiple input methods: full Pinyin, double Pinyin (Xiaohe, Natural Code, etc.), abbreviated Pinyin, handwriting, stroke input, etc.
• Rich text input: emoji, kaomoji, math symbols, simplified/traditional Chinese, mixed English/Chinese input.
• Keyboard customization: dark mode, adjustable height, left/right-hand mode, floating keyboard.
• Clipboard manager: supports history, deletion, clearing, and restore.
• English input: automatic spacing, word suggestions.
• Smart input: symbol matching, Pinyin correction, emoji predictions.

Key Features

• Completely offline: no network access, no ads, no data collection.
• Privacy-first: minimal permissions, fully local execution, data never leaves the device.
• Highly customizable: users can fully tailor appearance and behavior.
• Efficient: optimized layout and dictionary for higher accuracy and speed.

App Library

Most app stores are plagued by intrusive ads and privacy abuse. The PlugOS App Library was built to address these issues, providing a clean, secure, and reliable application source. It follows the principle of privacy-first—no ads, no tracking, no manipulation.

Categories

• Built-in PlugOS apps: preinstalled, deeply integrated, essential core features.
• Official PlugOS apps: developed or curated by PlugOS team, privacy-compliant, practical and minimal.
• Curated open-source apps: community-developed, free of commercial interference, privacy-respecting.
• GMS native apps: optional Google apps (e.g., Gmail, Drive) for users who require Google services.

Key Features

• Simple & clean: no ads, no bloat, minimal interface.
• Privacy protection: no data collection, no background tracking.
• Safe & trusted: all apps are vetted and security-checked.
• Convenient management: one-click install/update, with version and changelog details.

Gallery

The PlugOS Gallery is a privacy-focused media manager for photos and videos. Designed from the ground up with privacy in mind, it ensures a clean, efficient, and fully controlled experience.

Features

• Absolute privacy: no ads, no internet, no data collection. Media stays fully local.
• Strong protection: pattern, PIN, fingerprint locks for the app or folders; hidden project support.
• Open-source transparency: developed on open-source code, auditable and trustworthy.

Useful Functions

• GIF and video playback: smooth support for common formats with playback controls.
• Organized management: cropping, search, copy/move files, easy organization.
• Customization: rename, change app icon/color, homepage view, folder layout.

PDF Reader

PlugOS’s built-in PDF Reader leverages Veil’s sandbox technology to ensure safe and clean PDF viewing.

Highlights

• Sandboxed isolation: protects against PDF exploits.
• Privacy-first: offline, ad-free, tracking-free.
• Lightweight: fast, smooth, distraction-free reading.

Notes

A privacy-first note-taking app: offline, ad-free, no tracking. Supports notes, checklists, quick categorization, and autosave. Simple, reliable, and designed for personal data protection.

Recorder

A high-quality, privacy-friendly recording app. Supports multiple scenarios, real-time volume visualization, custom file names, and easy management. Includes widgets for quick recording. Runs fully offline, ad-free, with minimal permissions. Fully open source.

Calendar

A privacy-centered scheduling tool. Supports events, reminders, repeat rules, holiday imports, filters, and sync with Google/Outlook if needed. No ads, no tracking, minimal permissions, with customizable themes and widgets.

Clock

A multifunctional time manager: alarm, stopwatch, and timer—all offline and ad-free.
Supports multiple alarms with vibration, labels, custom ringtones, progressive volume, snooze. Stopwatch supports lap recording; timer includes pause and vibration alerts. Clean interface with dark mode and customization options.

Calculator

An open-source calculator with basic/advanced operations, currency conversion, history, and UI customization. Offline, ad-free, no tracking. Secure and reliable for daily use.

Other Integrated Apps

PlugOS also includes carefully selected open-source apps for privacy and functionality:

• Heliboard Input Method: lightweight English IME, no internet, privacy-safe.
• K-9 Mail Client: open-source mail client with strong privacy, ad-free, supporting common protocols.