| What it does | Free attendance calculator for students to track how many classes they can safely miss
| Free calculators for marketers, affiliates and store owners
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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 | - 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
| - ROAS calculator with break-even analysis
- CPA and CPM calculator for ad costs
- LTV and CAC calculators for e-commerce
- Affiliate earnings and EPC calculator
- UTM link builder for GA4 tracking
- A/B test significance and sample size calculator
- Shopify profit calculator
- YouTube earnings estimator
- Affiliate Link Checker Chrome extension
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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
| - Runs entirely in browser with no signup required
- Private calculations that never leave your device
- Every tool explains formulas, benchmarks and common mistakes
- Completely free with no premium plans
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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 | Not checked yet ● no change since last check |
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| Trust Flow (Majestic) | 1 | 1 |
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| Citation Flow (Majestic) | 19 | 17 |
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| Referring domains (Majestic) | 3 | 2 |
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CalcAttendance
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