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Android 12+ · Jetpack Composev4.18.1 LatestGoogle Play Verified

GT-Launcher

A modular Android home screen ecosystem with a capability-based card builder, sub-millisecond OmniSearch, and OBD-II vehicle HUD telemetry.

Open in Google Play
< 180 ms
Cold Startup
120 FPS
Compose Render Loop
< 45 MB
Idle Memory
100%
Local & Private

Interactive Feature Matrix

Select a module below to inspect live recordings, architecture design, and technical parameters.

8 Live Demos
5-Tab Card Builder
Modular UI System

5-Tab Card Builder

Construct bespoke widget cards step-by-step: configure capabilities (system monitors, crypto tickers, weather, media), behaviors, visual styles, dimensions, and custom image backdrops.

ENGINEERING METRICS
19+ UCCS Nodes
Card Capabilities
6 Engine Modes
Visual Styles
1x1 to 4x4 Cells
Grid Constraints

Visual Style Studio

The real Style Studio, ported: pick a preset, then every corner, fill, border, shadow, glow, texture and pattern control below is live and adjustable — same fields the app itself exposes.

NO MEDIA
STANDBY
COMM
FINANCE
WEATHER
Live preview — every control on the right updates it instantly

Add a Module

20 capabilities

APP LAUNCH
Primary tap target for opening an app.
SYSTEM STATUS
Battery, RAM, storage and quick actions.
ANDROID WIDGET
Embeds a platform widget surface.
⚠ won't combine with: GALLERY, CAMERA, MEDIA, APP DRAWER
GALLERY
Displays an image feed or album carousel.
⚠ won't combine with: ANDROID WIDGET, CAMERA, APP DRAWER
NOTIF CATIONS
Monitors app notifications inside the card.
COMMS
Focused communication sources and alert channels.
CAMERA
Camera shortcut and gesture-driven capture actions.
⚠ won't combine with: ANDROID WIDGET, GALLERY, MEDIA, APP DRAWER
MEDIA
Playback controls for media sessions.
⚠ won't combine with: ANDROID WIDGET, CAMERA
APP DRAWER
Opens or represents the app grid.
⚠ won't combine with: ANDROID WIDGET, GALLERY, CAMERA
SPACER
Reserved empty slot.
DECK ROTATOR
Swipe to 3D-flip between other capabilities on this card.
CHRONO METER
Large clock display, taps through to system alarms.
WEATHER
Current temperature and conditions for your location. (--°C PENDING)
CALENDAR
Upcoming events from your device calendar.
COUNTDOWN TIMER
Simple countdown timer, runs while the card is visible.
QUICK NOTE
Freeform text note stored on the card. (This is a fast Notes card)
FLASH LIGHT
Toggles the camera torch.
STEP COUNTER
Today's step count against a daily goal.
FINANCE
Portfolio tracker — crypto, FX and stocks with live P&L. (DEMO: —)
APP LIST
Scrollable alphabetical list of all your apps, right on the card.
⚠ won't combine with: ANDROID WIDGET, GALLERY, CAMERA, APP DRAWER
Release history

GT Launcher changelog

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Overview

GT-Launcher is an open-source Android home screen application built entirely with Kotlin and Jetpack Compose, designed as an ergonomic, ultra-fast mobile productivity workspace.

Core Architecture

  • UI Framework: 100% Jetpack Compose with reactive state management
  • Card System (UCCS): Every card is built from composable capabilities rather than a fixed type, with conflict protection between incompatible modules in the editor
  • Theme Engine: 6 visual styles (Flat, Glass, Neobrutalism, Claymorphism, Minimalism, Neon), 12 color palettes, and live theme automation by clock/battery/weather
  • OmniSearch: Web, Play Store, installed apps, contacts, and system settings, all running concurrently from one command bar
  • Drive Mode: OBD-II BLE live telemetry, GPS speedometer, audio spectrum, and OCR fuel-receipt scanning in a landscape cockpit HUD

Performance Benchmarks

  • Cold Startup: < 180 ms on modern Android 14+ devices
  • Memory Footprint: < 45 MB resident memory in background idle
  • Frame Rate: Consistent 120 FPS scrolling across app drawers and widget grids

Recent Updates (v4.15 → v4.18.1)

  • Gesture Input & Combo Link: turn a shape drawn on a card (circle, triangle, checkmark, four arrows) into an action via a from-scratch $1 Unistroke recognizer, or hold one card and swipe a second, linked card to fire a bound action.
  • Tasker & MacroDroid, Both Directions: trigger a Tasker task or MacroDroid macro from a card or gesture — or drive GT-Launcher itself from an external automation (load a preset, toggle Drive Mode/sidebar, launch a specific app).
  • Redesigned Edit Mode: tap a card or sidebar button to select it, then use a floating dock for move/resize/rotate/settings/delete. Sidebar buttons now sit on a real free-cell grid with overlap protection.
  • Declarative Settings Engine: all 10 settings tabs were rebuilt on one typed catalog; search now reaches 55+ individual destinations instead of just section names, and Style Studio moved into Settings with a live preview of the real home screen underneath every slider.
  • New Cards: Calculator, Water Intake, Focus Timer, Voice Memo, Quick Toggles (Wi-Fi/Bluetooth/DND), and Favorite Contacts.
  • Instant Battery Status: battery percentage now updates the moment it changes via a system broadcast, replacing the old 5-second polling loop.
  • Per-Card Visual Style Override: any card can now break from the global visual style independently.
Complete Documentation Available

This project includes 10 technical guides and architectural specifications.