Intelligent Calculator

eVolva Intelligent Solution · 2026. Rev 1.0

Calculation tape

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Intelligent Calculator

eVolva Intelligent Solution

2026. Rev 1.0

Web/HTML edition of the Android scientific calculator. Core modes: Sci, Eng, Convert, Biz, Stat, Prog, Date, and 2D plot.

Calculations stay on this device. Keyboard: digits and operators, Enter to calculate, Backspace to delete, Esc to clear. The % key calculates remainder, matching the Android app.

Function plotter

Controls

Formula & range

Angles xmin xmax

Preset Layout Curve color Line width Grid

Save name

Trace curves Position Trace speed

Surface y min Surface y max

Y min Y max

Curve colors

Separate curves with semicolons. Drag to pan or rotate 3D; wheel/pinch to zoom. Polar bounds use θ in radians. Surface bounds apply to x and y.

Solar–Lunar Info

Controls

Location & settings

Search offline cities

Saved locations

Location name Latitude Longitude Timezone

Prayer method Asr method High latitude rule Islamic features (prayers, Hijri, Qibla)

Date & playback

Local date & time Step Range end

Sky display

View Star names Equinox arcs Solstice arcs Qibla Sunrise/sunset Prayer markers

Prayer times

Qibla direction

North is at the top. This is a calculated true-north bearing; align it with a calibrated compass.

Gold: Sun · Blue: Moon · Green: Qibla · Solid path: elapsed; dashed: upcoming. Drag sphere to rotate; wheel/pinch to zoom.

Sky Dome Guide

Guide language