BigOTP is a free accessibility app built with care for elderly users, people with low vision, and anyone who struggles to read small OTP codes quickly.
When your bank, payment app, or any service sends you a one-time password, BigOTP instantly:
• Pops up a floating bubble with the code in large, high-contrast digits — right over whatever you're doing
• Reads it aloud digit by digit — "4... 7... 2... 1..."
• Keeps the bubble visible so you can see the code while you type it elsewhere
• Automatically clears the code once it expires
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WHO IS BIGOPT FOR?
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• Elderly users who find small notification text hard to read
• People with low vision or visual impairments
• Anyone who loses the OTP before they can type it in
• Users of screen readers — BigOTP works alongside TalkBack
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HOW IT WORKS
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1. Grant notification access once (no SMS permission needed)
2. Receive any OTP from any bank or app
3. BigOTP pops up a floating bubble showing the code in large digits
4. It speaks each digit clearly: "4... 7... 2... 1..."
5. The bubble stays visible while you type the code into any app
That's it. No setup. No accounts. No configuration needed.
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PAYMENT OTPS — EXTRA CARE
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When BigOTP detects a payment OTP, it:
• Shows the transaction amount alongside the code
• Reads "Payment OTP — this approves [amount]" before the digits
• Displays a clear reminder: "Never share this code with anyone"
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FEATURES
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✓ Floating bubble — large digits appear over any app the moment your OTP arrives
✓ Text-to-Speech reads each digit separately at a clear, steady pace
✓ Works with every bank and payment app in India and worldwide
✓ Full-screen accessibility mode available in settings for maximum readability
✓ Countdown timer shows how many seconds remain before the code expires
✓ Recent codes history — in case you need to look back
✓ Respects your device font size, contrast, and accessibility settings
✓ Works with TalkBack — coordinates so they never talk over each other
✓ Animations are skipped if you have Reduce Motion enabled
✓ Works completely offline — no internet needed to display your codes
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PRIVACY — YOUR CODES STAY ON YOUR DEVICE
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• No data is ever sent to any server
• OTP codes are never stored in the cloud
• No account required, no sign-in
• No ads, no tracking, no analytics of any kind
• Code history is stored only on your phone and is auto-wiped on expiry
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PERMISSIONS EXPLAINED
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• Notification access — to read OTP notifications from your SMS app.
BigOTP does NOT request SMS permission and cannot read your message history.
• Display over other apps — to show the floating code bubble while you type.
This is optional; the full-screen display works without it.
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FREE FOREVER
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BigOTP is and will always be free. No in-app purchases. No premium tier. No ads.
Built with love for the people who need it most.