LogicNote : Notepad Calculator

Type naturally, calculate instantly. Free offline notepad calculator for Android

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.