LogicNote : Notepad Calculator

LogicNote is a free natural language calculator notepad for Android.

Instead of tapping buttons, just type — and results appear instantly

on every line.

It works like a smart notepad that understands math.

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HOW IT WORKS

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Just type naturally:

40 hours at $35/hour → $1,400.00

flight $340 + hotel $120 x3 → $700.00

$5000 + 18% tax → $5,900.00

100 km in miles → 62.14 miles

Jan 1 + 90 days → Apr 1, 2025

Words are ignored. Numbers, units, and operators are

calculated automatically.

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KEY FEATURES

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✦ NATURAL LANGUAGE MATH

Type like you think. No buttons, no formulas.

"rent 1200 utilities 150 food 400" → 1,750

✦ PERCENTAGE CALCULATOR

• $200 + 15% → $230

• 30% of 950 → 285

• 45 out of 60 → 75%

• 900 is what % of 1200 → 75%

✦ CURRENCY CALCULATOR

Supports $, €, £, ₹, ¥ and all ISO currency codes.

Built-in exchange rates. Works fully offline.

• split $120 three ways → $40

• 1500 INR in USD → ~$18

✦ UNIT CONVERTER

Length, weight, volume, temperature, speed, area, data, energy.

• 5 ft 11 in cm → 180.34 cm

• 30°C in °F → 86°F

• 70 mph × 3 hours → 210 miles

✦ DATE & TIME CALCULATOR

• days until Dec 25 → days remaining

• today - 2 weeks → exact date

• 9:00 AM + 90 min → 10:30 AM

✦ VARIABLES

Define once, reuse across lines.

rate = $35

40 hours × rate → $1,400

✦ RUNNING TOTAL

A live Total bar shows the sum of all results.

Type "total" anywhere to reference it.

✦ EXPORT & SHARE

Copy, share as text, or export as a clean image.

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WHY LOGICNOTE

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✓ 100% offline — no internet required, ever

✓ No account, no login, no tracking

✓ Auto-saves every second

✓ Clean notepad interface — reads like plain text

✓ Free to download and use

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WHO IS IT FOR

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★ Freelancers calculating invoices and hourly rates

★ Students doing unit conversions and math problems

★ Travelers converting currencies and distances

★ Anyone who does quick math inside a notes app

★ Professionals tracking expenses and budgets

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PRO UPGRADE (optional, one-time)

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Upgrade to LogicNote Pro for $2.99 (one-time, no subscription):

• Remove all ads

• Unlimited documents

• Syntax color themes

• Premium editor fonts

• Font size control

• Watermark-free image export

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COMPARE

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Regular calculator: buttons only, no context

Spreadsheet app: complex, overkill for quick math

Notes app: no calculations

LogicNote: natural language + math + units + dates — all in one

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LogicNote is the notepad calculator app Android has been missing.

Free. Offline. No account needed. Download and try it in 30 seconds.