AI Note Taker
Capture notes and let the app process them with AI into organized, searchable content.
Practical tools for everyday work.
Calculate. Compare.
Get on with your day.
Calculators and utilities created by Adam Chen for pricing, planning, engineering, files, and routine business tasks.
The collection
A useful tool starts with a specific problem.
Find a calculator or utility for the task in front of you.
These tools grew from everyday work: comparing costs, checking assumptions, handling files, and making recurring calculations easier. Each card describes a specific job.
Have a workflow that needs its own tool? Talk with Adam about a custom solution, or explore the APIs to build one with your agent.
Aspect Ratio Calculator
Calculate screen dimensions and compare common aspect ratios from a chosen width or height.
Open App ↗Business Card File (AI)
Create and manage digital business-card files with AI-assisted entry and organization.
Open App ↗CAGR Calculator
Calculate compound annual growth rate between an initial value and a final value over time.
Open App ↗CP Testing Financial Tradeoff
Compare panel cost and yield assumptions to evaluate CP testing financial tradeoffs.
Open App ↗Date Duration Calculator
Add or subtract durations from dates and calculate the time between dates.
Open App ↗DPPM Failure Rates
Convert defect counts into DPPM and estimated sigma-level failure-rate metrics.
Open App ↗Easy Timesheet
Record work intervals and summarize hours for a simple timesheet.
Open App ↗eDP Bandwidth Calculator
Estimate eDP link bandwidth from display timing and CVT parameters.
Open App ↗eDP TCON Calculator
Calculate eDP TCON timing and bandwidth requirements for a display configuration.
Open App ↗Feature / Cost Tradeoff
Compare product features and costs to see the tradeoff between capability and price.
Open App ↗Fixed Profit Margin
Calculate any missing cost or price while keeping the profit margin percentage the same across two products.
Open App ↗IC Temperature Calculator
Estimate integrated-circuit temperature from power, thermal resistance, and ambient conditions.
Open App ↗Inventory Clearing Pricing
Calculate clearing prices and margins for inventory that needs to move.
Open App ↗Normalize Numbers
Normalize a set of numbers and inspect summary statistics for the resulting distribution.
Open App ↗P2P Pair Calculator
Calculate how many point-to-point panel pairs are needed for a configuration.
Open App ↗Partial Lot Subsidy
Calculate a subsidized price when a shipment contains a partial lot.
Open App ↗Percentage Difference Calculator
Calculate the percentage difference between two values.
Open App ↗Price Reduction Strategy
Model a price reduction strategy and the resulting low-price justification.
Open App ↗Profit Margin Calculator
Calculate selling price, cost, and profit margin relationships.
Open App ↗Quick Break-Even Calculator
Estimate the break-even point from fixed costs, variable costs, and price.
Open App ↗Return on Investment
Calculate return on investment using standard or volume-based inputs.
These tools are practical aids and experiments. Check important outputs against your source information and follow the guidance on each app.