itay-grudev/SingleApplication

Health v2 · maintenance only

Flags: no_license

Adoption not part of the score

1005 stars · 245 forks observed · 2026-09-03

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

A C++ library replacing QtSingleApplication for Qt 5 and Qt 6 that enforces single-instance behavior for Qt applications. It supports inter-instance communication, allowing secondary instances to send data to the primary instance.

Use cases

• prevent multiple instances of my qt application from running
• send command-line arguments from a second app launch to the running instance
• replace qtsingleapplication in a qt6 project
• single instance desktop app with inter-instance communication
• focus the existing window when user launches the app again

When to choose

• you are building a Qt 5 or Qt 6 desktop application that must run as a single instance
• you need subsequent launches to forward data or arguments to the primary instance
• you want a drop-in QApplication/QCoreApplication replacement with qmake or CMake integration

When to avoid

• your application is not built with Qt
• you need single-instance enforcement outside of the Qt application lifecycle
• you require a permissive license - the project uses a custom license

Facets

library · maturity active

concurrency developer-tools desktop-applications cross-platform developer-tools cpp cross-platform qt qt5 qt6 single-instance ipc singleton desktop

Member repositories

For agents

markdown · JSON · MCP: product_card(name="itay-grudev/SingleApplication")