Everything Tools - Toolbox

Manmulsang (Everything Tools) brings the calculators and everyday utilities you actually use into one app.

■ 100 essential tools, fully offline
Salary take-home pay, loan repayment, savings maturity, age calculator, D-day, severance pay, BMI and more — 100 essential calculators are built into the app and run instantly without an internet connection. Results update as you type, complete with repayment schedules and deduction breakdowns.

■ Search once, reach 10,000+ tools
Unit conversions, date math, cooking measures, taxes, travel, study tools and more across 13 categories. New tools appear automatically — no app update needed.

■ What makes it different
• Restrained ads — one bottom banner, plus an occasional full-screen ad after several tools. Never over your results.
• No sign-up — open and use.
• Explanations included — each tool explains when results may differ from reality, with FAQs.
• Verified reference rates — tax brackets and insurance rates are curated from checked sources.

■ Features
• Browse 13 categories: finance, tax & salary, dates, health, cooking, conversions and more
• Favorites and recent history for one-tap access
• Dark mode
• Share and copy results

Note: tool content is currently provided in Korean.

Recent changes:
Tables now switch to a card layout at 200% text size for easier reading, Search/Favorites empty states match the offline view's style, and screen-reader announcements for results were improved.