| What it does | Free online countdown timer with custom sounds, themes, and sharing
| Free, real-time 401(k) calculator showing contributions, employer match and compound growth
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| Stage | Not given
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| Founded | Not given
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| Based in | Not given
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| Pricing model | Free
| Free
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| Pricing | Not given
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| Key features | - Custom duration and end time settings
- Multiple sound alert options
- Fullscreen mode for focused display
- Shareable timer links
- Keyboard shortcuts for quick control
- Mobile optimized responsive design
- Saved preferences between sessions
- Browser notifications
- Up to 24 hour timer duration
- Popular preset timers
| - Live, real-time calculations that update as you type
- Breaks down balance into contributions, employer match and investment growth
- No signup or account required
- All calculations run in the browser with no data stored
- Updated for 2026 IRS contribution limits
- 11 focused calculators for different 401(k) scenarios
- Visual chart showing balance growth over time
- Employer match calculator
- Roth vs traditional comparison tool
- Early withdrawal penalty calculator
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| What makes it different | - Completely free with no hidden costs or premium features
- No registration or personal information required
- Privacy focused with no tracking or data collection
- Works on all devices without downloads or installations
- Shareable timer links for collaborative timing
| - Fully transparent formulas shown for every calculation
- IRS-accurate calculations verified against official guidance
- No advertising or sponsored products
- Complete privacy with client-side-only calculations
- Worked examples showing calculations step-by-step
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | 14 ● no change since last check | 7 ● no change since last check |
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| Trust Flow (Majestic) | 18 | 17 |
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| Citation Flow (Majestic) | 21 | 10 |
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| Referring domains (Majestic) | 487 | 19 |
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Best Countdown
401k Calculator