Both are free. Both show the time. But they serve completely different needs. This comparison covers desktop presence, customization, alarms, timers, world clock and resource usage to help you decide.
An honest, independent comparison. Windows Clock is a Microsoft app included with Windows 10/11. ClockX is a free third-party utility available at clocx.net since 2007.
| Feature | ClockX | Windows Clock |
|---|---|---|
| Floating desktop clock | ✓ Yes — always visible on desktop | ✗ No — only taskbar, no floating window |
| Analog clock face | ✓ Yes — 400+ analog skins | ✗ No — digital only |
| Custom skins / themes | ✓ 400+ skins (PNG & BMP, user-editable) | ✗ No — follows system theme only |
| Transparency control | ✓ 256 levels + mouse-over transparency | ✗ No |
| Always-on-top mode | ✓ Yes — stays above all windows | ✗ No |
| Click-through mode | ✓ Yes — mouse clicks pass through | ✗ No |
| Alarms | ✓ Full-featured — sound, window, app launch, shutdown | ~ Basic — requires app to be open |
| Recurring alarms | ✓ Yes — daily, weekly, custom | ~ Limited |
| Countdown timers | ✓ Yes — from context menu | ✓ Yes — inside the app |
| Stopwatch | ✗ No | ✓ Yes |
| World clock / timezones | ✓ Yes — multiple on desktop simultaneously | ~ Yes — inside the app only |
| Calendar | ~ Simple — click overlay, no task planning | ✓ Full — integrates with Windows Calendar |
| Multi-monitor support | ✓ Yes — place on any display | ~ Via taskbar on each monitor |
| Auto-start with Windows | ✓ Built-in option in settings | ✓ Yes — system component |
| Resource usage | ✓ Very low — C++ app, minimal RAM | ~ Low — UWP app, slightly more RAM |
| Supported Windows versions | XP SP2 through Windows 11 | Windows 10, Windows 11 only |
| Installation required | Yes — 21 MB installer | No — pre-installed |
| Price | Free — freeware since 2007 | Free — included with Windows |
Both tools serve different use cases. The right choice depends on what you actually need from a desktop clock.
Wondering how ClockX stacks up against other desktop customization tools?
Rainmeter is a full desktop customization suite. ClockX is a dedicated clock utility. Much simpler to set up, lower resource footprint.
Full comparison →Windows Gadgets were discontinued in Windows 8. ClockX fills that gap — it works on modern Windows and is actively maintained.
Full comparison →Multiple timezones on your desktop at once. See how ClockX helps distributed teams manage schedules across time zones.
Use case guide →