Guesstimate vs Light Here

Ever wonder "what's the answer if this number could be anywhere from 2 to 4?" Guesstimate is a calculator built for uncertainty. Use the ~ operator to define ranges in your formulas. For example, (2~4) * (1~3) means "a number between 2 and 4, multiplied by a number between 1 and 3." Guesstimate runs hundreds of thousands of Monte Carlo simulations to show you the full distribution of possible results. FEATURES - Uncertainty ranges: Use ~ to express "somewhere between" in any formula - Monte Carlo simulation: Up to 10 million iterations for accurate results - Interactive histogram: Tap bars to see exact percentages and sample counts - Box plot visualization: See min, Q1, median, Q3, and max at a glance - Full statistics: Mean, median, standard deviation, confidence intervals, and percentiles (P1 through P99) - Calculation history: Review and reload past formulas - Configurable settings: Adjust iteration count, histogram bins, confidence level, and distribution type (uniform or normal) - Built-in calculator keypad: No keyboard needed — dedicated buttons for digits, operators, parentheses, and the ~ range operator - Works on iPhone and iPad EXAMPLES - How much will dinner cost? (12~18) + (8~14) + (3~7) - Estimating project hours? (2~4) * (5~8) - Unit conversion with uncertainty? (2.79~3.09) * ((1300~1400) / (27~33)) No account required. No data collected. Just math.

Light Here shows the places where your people live as clocks, colored by whether it's a good time to reach them. • Gold: a good time to call • Coral: early or late, maybe send a message • Blue: they're probably asleep KNOW WHEN TO CALL • Up to four places, each with its own reachable hours • "+1 day" shows when they're already into tomorrow • Time differences between every place, at a tap FIND THE RIGHT TIME • Slide ahead to see everyone's time at once • "Find a time for everyone" jumps to the next time every place is awake • Share the time with each place's local time spelled out REACH FAMILY, FRIENDS, CO-WORKERS FROM THE APP • Add people from Contacts, no Contacts permission needed • Tap their face to call, message, FaceTime, WhatsApp or Telegram • A gentle check before you call someone who's likely asleep DISPLAY IT ANYWHERE • Made to stay on: on your nightstand, desk or an unused iPad • Stays awake while charging, and Night Look dims the faces after dark • Slow drift helps protect the screen THREE DIFFERENT DESIGNS AND WIDGETS • Airport analog clocks, LED, or a flip board • 12- or 24-hour time • Home screen, StandBy and lock screen widgets PRIVATE • Works completely offline, with over 159,000 cities and towns built in • No accounts, no ads, no tracking. Nothing leaves your device. Town names from GeoNames.org (CC BY 4.0).