Easy Logic Simulator

Draw and simulate digital logic circuits, with subcircuits.

Draw and simulate digital logic circuits on your phone, tablet or desktop.

Build circuits with logic gates, latches, flip-flops, clocks, switches, RAM/ROM, 7-segment displays and ready-made parts like adders and an ALU. Press Run and watch the signals flow, or step one clock edge at a time.

NEW: Subcircuits. Save any circuit and reuse it as a chip inside bigger circuits.

• Example circuits to learn from, including counters
• Undo/redo, multi-select, text notes
• Automatic saving, import and share circuit files
• Dark and light themes, 9 languages

The free version can save up to 2 subcircuits per project. A one-time purchase unlocks unlimited subcircuits.

Found a bug or want a new component? Report it from the About page.