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Letterboard spelling
A clear, large-key letterboard to spell words and build sentences, with smart word prediction to speed things up.
A FIRST FOR INDIAN FAMILIES
The first multilingual letterboard app designed for Indian families.
Katha helps non-verbal and minimally-speaking people express themselves through touch, sound and words — spelling and speaking fluently in English, Bengali and Hindi. Built with love, 100% offline, and priced so every family can afford it.
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AVAILABLE NOW ON
Google Play
COMING SOON TO
App Store (iOS)
- One-time purchase — no subscriptions, ever
- Works fully offline — no accounts, no ads, no tracking
- Financial support available for families who need it
3languages — English, Bengali, Hindi
100%offline & private
One-timepurchase, no subscription
72×72large, accessible touch targets
WHAT KATHA DOES
Everything a family needs to communicate — in one calm, offline app.
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Core vocabulary
One-tap access to the most-used words, colour-coded by category — social, actions, descriptors and questions.
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Natural speech
Tap to speak any word or sentence aloud in the chosen language, with adjustable voice, rate and pitch.
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Three languages
Switch instantly between English, Bengali and Hindi — the first letterboard built around Indian languages.
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Emergency phrases
Always-ready phrases like “Please help me” and “Call for help” for the moments that matter most.
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Built for access
Dwell selection, switch scanning, high-contrast and kids themes, large text, plus sound & haptic feedback.
A LOOK INSIDE
Calm, uncluttered, and designed to be understood.
MADE FOR INDIA
The first multilingual letterboard built around Indian languages.
Most communication apps assume English. Katha was designed from the ground up for Indian families — so a child can think and speak in the language of home.
A B C
English
অ আ ই
Bengali · বাংলা
अ आ इ
Hindi · हिन्दी
SIMPLE, HONEST PRICING
Pay once. Use forever.
One-time purchase
No subscriptions. No hidden fees. No ads. Katha is priced to be the most affordable letterboard app — because communication should never be a luxury.
- Buy it once on Google Play — yours for good
- Every feature included, in all three languages
- Free updates as Katha grows
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Need help affording Katha? Please reach out.
No family should go without a voice because of cost. If the price is a barrier for your family, financial support is available — simply contact the developer, Dr Arindam Dey, and we will find a way.
Contact Dr Arindam Dey💬
Feedback, bugs or a feature request?
Katha grows with the families who use it. Found a bug, have an idea, or want a new language or feature? Your feedback shapes what comes next — tell the developer, Dr Arindam Dey, and it will be heard.
Send feedbackGET IN TOUCH
Questions, feedback, or need support? Send a message.
Whether it’s about pricing and financial support, a bug, or an idea for a new feature — your message goes straight to the developer, Dr Arindam Dey.