Finance

Calculate your car loan monthly payment factoring in vehicle price, down payment, trade-in value, sales tax, and registration fees. Shows amount financed, total interest, total cost, a descending balance curve, and a yearly amortization schedule.

Finance

Calculate credit card cash back rewards across multiple spending categories. Enter categories as 'name, monthly spend $, cash back %' per line. Shows monthly and annual cash back per category, total rewards, effective cash-back rate, and a comparison against a flat-rate card.

Finance

Compare avalanche (highest APR first) vs snowball (lowest balance first) strategies for paying off multiple credit cards. Enter cards as 'name, balance, APR%, minPayment%' per line plus an extra monthly payment. Shows payoff time, total interest, savings vs minimum-only, and balance decline curves.

Finance

Calculate the compound annual growth rate (CAGR) from a beginning value, ending value and number of years; compare with the simple average growth rate and visualize the smooth growth curve. CAGR = (EV/BV)^(1/n) - 1.

Media

Audit an audio file and recommend repair tools

Media

Match room tone or ambience between two recordings

Media

Reduce bleed between multiple audio stems and package the results

Media

Fill dull or notched frequency areas with targeted spectral compensation.

Media

Reduce low-frequency wind rumble and broadband gust noise in recordings.

Media

Reduce mild tape speed wobble and compensate known speed offset in audio recordings.

Health

Estimate your BAC from sex, weight, drinks and time using the Widmark formula. Returns g/dL and ‰, predicts sober time, and flags the impairment tier and legal driving limits.

Utilities

Browse ~25 textbook crystal structures with space group, lattice constants, coordination, and a rotatable Three.js 3D ball-and-stick model.