ZoneClock vs TriTab Calc

ZoneClock helps you seamlessly convert time between countries instantly with a clean, minimalistic UI. Simply enter a time in one location, choose another country, and see the exact local time immediately. Designed for travel, remote teams, and anyone working across time zones.

A three-tab calculator that lets you keep multiple calculations going at the same time. The A, B, and C tabs each work as an independent calculator. Switch between them without losing your current expression or result. Use A for the pre-tax price, B for the tax-inclusive total, and C for the discounted price—all without writing down intermediate numbers or clearing your work. Ideal for estimates, invoices, shopping, splitting bills, comparing unit prices, and everyday calculations. ■ Three Independent Calculators Switch between A, B, and C with one tap. Each tab keeps its own expression and result, so you can work on three calculations in parallel. ■ Calculation History Review your recent expressions and results. Tap a history entry to copy its result instantly. ■ Copy and Paste Tap the result display to copy or paste. Touch and hold to clear it. Moving numbers between the calculator and other apps is quick and easy. ■ Tax Calculation Calculate tax-inclusive and pre-tax prices with a dedicated button. The tax rate can be changed in Settings. ■ Essential Calculator Functions Supports basic arithmetic, square root (√), square (x²), percentages (%), sign change (±), parentheses, and a 00 key. ■ Large, Clear Display Large numbers, high contrast, and automatic thousands separators make expressions and results easy to read. ■ No Ads, No Account No banner ads or full-screen interruptions. No sign-up or account is required—just open the app and start calculating. ■ Perfect For • Checking estimates and invoices • Comparing pre-tax, tax-inclusive, and discounted prices • Calculating sales tax and shopping discounts • Splitting bills and calculating per-person costs • Comparing unit prices • Adding inventory and quantities ■ Privacy Your calculation history and settings are stored only on your device. The app does not collect personal information or send your data to external servers. ■ Try the Free Version An ad-supported free version, “TriTab Lite,” is also available. Try the free version first, then choose this version for an ad-free experience.