100% Offline On-Device Intelligence

The Next-Gen Smart Calculator.
Voice-Powered. Floating. Unstoppable.

Speak math naturally in English, Hinglish or Hindi, and keep a running total by voice. On Android, float a mini-calculator over WhatsApp or Excel and calculate straight from your home screen widget. Zero ads and zero cloud tracking, on Android and iPhone.

Get it on Google Play Download on the App Store ▶ Try Interactive Keypad
  • ✓ 100% Free & No Ads
  • ✓ Zero Telemetry / Cloud Logs
  • ✓ Works In Airplane Mode
9:41
5G 🔋 100%
⋮
45 × 12 + 80
620
AI Voice Mic
OFF
0%
Offline & On-Device
Zero network latency, 100% private
< 0ms
Calculation Latency
Instantaneous real-time previews
0
Ads or Cloud Trackers
No analytics SDKs or telemetry
0
Voice Languages
English, Hinglish, Hindi, Spanish, French, German
Try it right here

Talk to it like a person. Get the real answer.

This demo runs the actual VoiceCalc AI calculation engine, built from the app's own code, right in your browser. Type or say a sum the way you'd say it out loud.

Say it however it comes out

  • ✓
    Fillers ignored: "hey bro, please 25 plus 30" → 55.
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    English, Hindi & Hinglish: "teen lakh ka aadha", "500 ko 5 se divide karo", "दो लाख का पंद्रह परसेंट".
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    Lakh & crore built in: answers grouped the Indian way (25,00,000) or internationally (2,500,000).
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    Remembers your total: say "250 plus 120", pause, then "plus 80" and "divided by 3".
  • ✓
    Everyday money math: GST, discounts, percentages, square roots and bill splits.

In the app, every calculation happens on your phone. Install your language's offline speech pack (Settings → Offline Speech) and voice works with no internet at all.

Live demo · real engine
“Try: 18% GST on 2500”
0
Ready to calculate
Tap to try Running total, tap in order

    The mic uses your browser's built-in speech recognition (in Chrome, Google processes the audio). The calculation runs on this page. Nothing is stored or sent to us.

    See it in action

    Fifteen seconds. One superpower each.

    Real app screens, real answers. Tap a phone for sound.

    VoiceJust say it“18% GST on 2500” → 2,950
    Hindi · HinglishLakh & crore“1 crore divided by 4” → 25,00,000
    Running totalIt remembers370 → plus 80 → ÷ 3 = 150
    AndroidFloats over any appOne tap, works offline
    Multitask Like a Pro · Android

    Picture-in-Picture Floating Overlay

    No more switching back and forth between apps. Keep a lightweight calculator bubble floating right over WhatsApp, Amazon, Google Sheets, or your PDF invoices.

    Never Lose Your Context

    Split expenses with roommates while chatting on WhatsApp, tally shopping discounts directly in Amazon, or double-check invoice totals on bank portals without leaving your screen.

    • ✓
      Draggable Anywhere: Touch and glide the overlay across any part of your phone screen.
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      Quick Collapse & Expand: Collapse into a minimal unobtrusive orb when reading, expand when you're ready to compute.
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      Zero Screenshot / Screen Read: Runs in an isolated Android window without ever reading or intercepting your screen contents.
    "Hey! Can you check the dinner bill? Pizza was ₹850, drinks were ₹420, plus 18% GST and ₹60 delivery."
    "Sure, calculating right now using the floating calculator bubble!"
    "Awesome, let me know each person's share (split by 3)."
    🪟 VoiceCalc PiP (Drag me!)
    850 + 420 + 60
    1,330
    Glanceable Power · Android

    Calculate Directly From Your Home Screen

    No need to launch the app for quick sums. Pin the interactive VoiceCalc AI widget directly to your Android launcher.

    Smart Launcher 10:24 AM
    VoiceCalc Widget
    ⚡ Instant
    12 × 1500
    18,000
    📞
    💬
    📷
    📁

    Always One Tap Away

    Whether tallying daily bills, calculating unit pricing in your car, or keeping track of expense tallies, your home screen widget gives you full computational capability right on your phone's desktop.

    Switch Theme Accent:
    • ✓
      Tactile Touch Response: Built-in vibration haptics on widget keys for tactile reassurance.
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      Instant Sync: Calculations carried out in the widget appear right in your history log.
    Mathematical Precision

    Scientific Suite & Flawless Engine

    Engineered with deep safeguards. No accidental clears, no cut-off numbers, and full trigonometric & logarithmic precision.

    sin / cos / tan
    asin / acos / atan
    log₁₀ / ln
    √x / ∛x
    x² / xʸ
    π / e / n!
    🛡️

    Smart Pending Operator Safety

    In ordinary calculators, accidentally tapping = after an operator (like 50 + 20 × =) wipes the screen to 0. VoiceCalc AI's intelligent safety engine detects pending operators, preserves your work, safely computes the equation, and alerts you gently without clearing your hard work.

    📜

    Infinite Smooth Scroll

    Entering a 60-digit number? Smooth horizontal auto-scroll ensures your numbers never freeze, clip, or truncate.

    📳

    Hardware Tactile Clicks

    Subtle crisp haptics on keypad clicks, distinctive double-pulse pattern on equals, and vibration reassurance.

    ⚖️

    Auto-Balanced Parentheses

    Automatic nested balance insertion ensures your math expressions remain valid without manually counting closing brackets.

    🔋

    True OLED Dark Theme

    Pure pitch-black OLED background saves battery life on AMOLED screens while keeping high-contrast readability.

    Zero Data Collection Guarantee

    Your Numbers Are Yours Alone.

    We believe financial numbers, budget tallies, and voice queries are deeply private. VoiceCalc AI contains zero advertising SDKs, zero user tracking, zero telemetries, and zero remote cloud database connections.

    ✓ 100% On-Device Calculations
    ✓ No Account or Login Ever
    ✓ Audio Processed in RAM Only
    ✓ One-Tap History Privacy Wipe
    Got Questions?

    Frequently Asked Questions

    Everything you need to know about VoiceCalc AI's features, privacy, and architecture.

    VoiceCalc AI uses your phone's built-in speech recognition (Android or iPhone) together with our own on-device math parser. Download your language's offline speech pack once (in the app: Settings → Offline Speech) and voice works fully offline, even in flight mode. Without that pack, your phone's speech service (Google or Apple) may process the audio. The calculation itself always runs on your phone, and the app never sends anything over the internet.
    Simply tap the PiP button in the app's top bar or enable it in Settings. Android will ask for "Display Over Other Apps" permission once. Afterwards, a compact floating calculator will hover over WhatsApp, Amazon, or Excel. You can drag it anywhere, collapse it to a bubble, or tap to calculate while keeping your active app visible.
    Standard calculators often trigger a reset error if you accidentally tap an operator like '+' or '×' right before pressing '='. VoiceCalc AI features our proprietary Pending Operator Safety engine: it safely computes the expression up to the last valid number or notifies you that the operator is still pending, ensuring your calculations are never accidentally lost.
    Touch and hold any empty spot on your Android home screen, tap "Widgets", scroll down to "VoiceCalc AI", and drag the widget to your home screen. You can customize its size and theme directly from the app.
    Absolutely not. VoiceCalc AI is built on a strict zero-data collection guarantee. We do not maintain any cloud databases, we don't have analytics SDKs, and we don't collect personal information or microphone audio. Everything stays locked inside your device's private sandboxed memory. Read our full policy on our Privacy Policy page.
    Yes! VoiceCalc AI is completely free to use with zero advertisements, zero popups, and zero banners. You get an uninterrupted, clean computing experience forever.
    Yes. Say "2 plus 2" and you get 4. Pause as long as you like, then say "plus 2" and you get 6. Anything that starts with an operator ("plus", "minus", "times", "divided by", "x") continues from the last result, and saying a new number on its own starts fresh. If you pause halfway, as in "25 plus …", the app waits for the rest.
    Talk normally: "what is 18 percent of 420", "half of 3 lakh", "square root of 144", "2 and a half times 4", "split 1200 between 4", "15% discount on 2,499" or "kitna hua". Fillers like "hey", "bro" and "please" are ignored. Voice works in English (India and US), Hinglish, Hindi, Spanish, French and German, and understands lakh and crore.
    No. iPhone doesn't let apps float over other apps, so the floating calculator, the home screen widget and the quick-settings tile are Android-only. Voice math, the keypad, scientific mode, conversions and history work the same on both.
    VoiceCalc AI is free on Google Play for Android and on the App Store for iPhone. You can also search for "VoiceCalc AI" in either store, or scan the QR code below with your phone camera.
    Now on Android & iPhone

    Ready for Smarter Calculations?

    Free on Google Play and the App Store. Offline, privacy-first voice math, plus a floating calculator and home screen widget on Android.

    Get it on Google Play Download on the App Store 🔒 Privacy Policy
    QR code that opens VoiceCalc AI in your phone's app store 📱 Scan with your phone camera. It opens the right store for Android or iPhone.
    VoiceCalc AI
    100% Offline · Android & iPhone
    Get the App