| What it does | Free Erlang C calculator for contact center staffing and service level planning
| Free Amazon FBA calculators and seller tools with verified 2026 fee rates
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| Stage | Not given
| Startup
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| Founded | Not given
| 2026
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| Based in | ES
| CN
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| Pricing model | Free
| Freemium
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| Pricing | Not given
| Free core tools with no signup. Pro plan: $29.99/month or $299/year (save 17%). One-time fee audit service: $299 for up to 50 SKUs, $4 per extra SKU.
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| Key features | - Calculates minimum agents needed for service level targets
- Erlang C probability and queuing formulas
- Computes average speed to answer (ASA)
- Shows agent occupancy and utilization
- Generates comparison table of agents and metrics
- CSV export for Excel analysis
- Embedded iframe version for websites
| - FBA Profit Calculator with all hidden fees
- PPC Analyzer for ACOS and ROAS calculation
- Fee Simulator comparing fulfillment methods
- Listing Grader with optimization tips
- Review Analyzer for competitive insights
- Inventory Optimizer with restock alerts
- Cost Tracker for expense management
- Real-time exchange rate conversion updated every 5 minutes
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| What makes it different | - No registration required, runs in browser without sending data
- Preset buttons for Spain's Law 10/2025 compliance targets
- Based on ITU-T E.600 recommendation and ITU-D teletraffic engineering
- Uses stable numerical recursion method for any agent count
- Completely free with no advertising when embedded
| - 50+ free tools with no signup, login or credit card required
- Fee rates verified monthly with open-source data published under CC BY 4.0
- Built by an 8-year Amazon FBA seller addressing real seller pain points
- Supports multiple marketplaces: Amazon US/EU/UK/JP/CA/AU, Temu, TikTok Shop, and Etsy
- Transparent formulas using industry-standard calculations verifiable by users
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| Community votes | 0 | 0 |
| DR (Domain Rating by Ahrefs) | Not checked yet ● no change since last check | 23 ● no change since last check |
| Trust Flow (Majestic) | 0 | 0 |
| Citation Flow (Majestic) | 4 | 16 |
| Referring domains (Majestic) | 3 | 10 |