| What it does | Free attendance calculator for students to track how many classes they can safely miss
| Free screen size calculator that compares TVs and monitors to scale
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| Stage | Not given
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| Founded | Not given
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| Based in | Not given
| RO
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| Pricing model | Free
| Freemium
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| Pricing | Not given
| Free calculators; optional Planning Pack €9 one-time purchase
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| Key features | - Calculate how many remaining classes can be missed while staying at target
- Determine how many consecutive sessions must be attended to recover if below threshold
- Track attendance for multiple subjects separately
- Browser-based with no sign-up or account required
- All calculations performed locally without sending data to servers
| - Side-by-side display comparison at true scale
- Calculate physical dimensions from resolution and diagonal
- Pixel density (PPI) calculations
- Field of view angle visualization
- Preset lists of monitors, TVs, laptops and phones
- Pixels per degree (PPD) calculator
- TV mounting height calculator
- Curved monitor radius support
- Optional Planning Pack PDF export
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| What makes it different | - No account or sign-up needed – instant access with no data collection
- All calculations happen in your browser – attendance data never leaves your device
- Supports multiple institutional requirements with 75%, 80%, 85%, and 90% target options
- Tracks multiple subjects simultaneously to prevent any single module from sliding below threshold
- Built and maintained by a single developer focused on honest, accurate answers
| - Draws every display to scale for visual comparison instead of guessing
- Uses THX and pixel-per-degree references for viewing recommendations
- Augmented reality shows actual screen size on your wall
- Free to use with no account or signup required
- Independent with no manufacturer influence on calculations
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | Not checked yet ● no change since last check | 1 ● no change since last check |
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| Trust Flow (Majestic) | 1 | 4 |
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| Citation Flow (Majestic) | 19 | 24 |
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| Referring domains (Majestic) | 3 | 18 |
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CalcAttendance
DisplayMath