How it works Screens What leaves your phone Features FAQ Get on Google Play →
Now on Google Play · Free · Android 12+

Reply like you. See what your chats reveal.

Kepton drafts replies in your voice and shows the patterns in your conversations — running on your phone, with no account to create. The only network step is a one-time model download, and you approve it before it starts.

On-device
Drafts and insights stay on this phone
No account
No sign-up, no ads, no analytics SDK
Your voice
Mirror learns your style from your chats
Kepton showing reply drafts, each ready to copy.
Runs on this phone
Never uploaded
Four moves · any app · any keyboard · nothing uploaded
Reply draftsPattern insightsAnalysisPersonasData MapOffline AI
Complete toolkit

One companion. Many ways to sound like yourself.

Draft, rewrite, switch persona, see the numbers, ask grounded questions — without pasting chats into someone else’s cloud.

Chat with confidence

Never blank again — and never upload your chats to get there.

Most AI reply tools ask you to paste screenshots or chat text into the cloud. Kepton flips that: you import an export you choose (or select/paste text for a quick action), then everything runs on-device — suggestions, rewrites, pattern insights, and Analysis.

Drafts are grounded in your conversation history and optional context you add. You review every line. You send what you mean.

  • Personalized reply draftsGrounded in chats you import — then shaped by the persona you pick (or Mirror, for your own learned style).
  • Instant rewrite helpAsk Kepton or Rewrite with Kepton on text you select — right from Android’s text actions.
  • See the patterns + ask questionsConversation insights for the numbers; Analysis for grounded observations — not character labels.
Four moves
01

Copy a message

In any app — long-press, copy. Kepton never touches your messaging apps.

02

Open Kepton

Tap the floating bubble or the app shortcut. Works with any keyboard.

03

Pick a reply

Three drafts in the style you choose — tone, Mirror, or an archetype persona.

04

Paste it back

Your keyboard, your app. Nothing is sent anywhere. Review every line first.

What's inside

Everything that makes chat AIs useful — plus privacy tools.

Works with the keyboard you already use. (A built-in keyboard is not part of 1.0.)

Smart reply suggestions

A floating bubble or panel that helps you answer faster — drafts grounded in your own history and context you provide.

Personas

Switch tone (Friendly, Professional, Mirror…) or character energy (The Wit, The Detective, Casanova…) — all on-device, none of your chats uploaded.

Ask & Rewrite

System “Process text” actions — Ask Kepton and Rewrite with Kepton — on text you select or paste. Quick help without leaving the chat.

Conversation insights

Pattern metrics: message counts, reply timings, balance. Narration describes the numbers — not personality or relationship verdicts.

On-device Analysis

Ask questions about a conversation and get observations grounded in snippets and metrics. Helpful context — not professional advice.

Data Map + kill switch

See what lives on your phone, delete contact data anytime, and block further internet after setup. Transparency without a credits ledger.

Real screens

Made to be understood in a minute.

The first thing Kepton does is show you what it does — on a built-in sample conversation, before you add anything of your own.

Replies that sound like you — the Kepton welcome screen.
Made for whoever you message most — the audience chooser.
Three drafts, one tap to copy — reply suggestions on a sample chat.
One place to start, not a dashboard — the Kepton home screen.
How fast you each reply, side by side.
When your conversation actually happens — an activity heat map.
Pick the voice your reply uses — the reply styles screen.
Add a chat in four steps — the export wizard.

Swipe, or use the arrows — 8 screens

Personas

Pick a vibe. Still sounds like you — on this phone.

Tone personas keep the register clear. Character personas add archetype energy — public-domain and fictional-feeling names, never trademarked TV lawyers. Switch before you suggest; review before you send.

Tone

Friendly

Warm, casual, concise — easy everyday replies.

Tone

Professional

Clear workplace register. No slang theatre.

Tone

Direct

Assertive and short when you need a boundary.

Tone

Mirror

Learns your style with that contact from your own messages.

Character

The Wit

Playful comebacks — sharp without being cruel.

Character

The Detective

Notices detail from history; precise, observational replies.

Character

Casanova

Attentive charm when the moment calls for it — still on-device.

Character

Chanakya

Strategic, measured lines for longer-game conversations.

Also in the app: Supportive, Formal, The Closer, The Genius, The Prodigy, Birbal — browse them on-device anytime. Custom personas come later.

Verifiable, not a promise

What actually leaves your phone

Most apps ask you to trust a privacy page. Here is the entire network surface instead, line by line.

WhatWhenLeaves your phone
Your chat messagesnever0 bytes
Reply draftsnever0 bytes
Conversation insightsnever0 bytes
Contacts, names, profilesnever0 bytes
Analytics, crash reportsneverno SDK in the app
The AI model filesonce, after you approve~2.6 GB down

Exactly one component of the app is permitted to open a network connection. During that download a CDN sees your IP address and the fact of the download — never your messages. Afterwards you can block the app’s internet access entirely. Full detail in the privacy policy.

Why Kepton

Cloud chat AIs need your data. Kepton keeps it where it belongs.

You still get smart drafts and conversation help — without the “paste everything into someone else’s servers” tradeoff.

Typical cloud chat AI

Helpful — if you upload

  • Paste screenshots or chat text into a web app or API
  • Needs internet every time you want a reply
  • Your conversation content leaves your device
  • Often requires an account or credits
Kepton

Helpful — and stays local

  • Works from exports you import and text you select
  • Runs offline after an optional one-time model download
  • Personas, Insights, Analysis, Data Map, and a network kill switch
  • Your chats never leave your phone
  • No account. Encrypted on-device storage
Built for privacy

On-device processing. No sign-up. Clear about the one network step.

01 / On-device

Your chats never leave your phone

Imported chats, memory, and Analysis threads stay encrypted on the device. Webonika does not receive or store your chat content.

02 / Offline AI

100% offline after setup

After the optional one-time model download you start yourself, suggestions and insights run without internet.

03 / Network

What can leave the device

During model download, a CDN may see your IP and the fact of the download — not your chats. Then the kill switch can refuse further internet.

04 / No account

No sign-up. You are the author

No credits ledger for your private messages. Review every draft before you send — you remain responsible for what goes out.

Before you install

What Kepton doesn't do.

Worth knowing up front, so the app matches what you expected when you open it.

No background reading

No access to any messaging app. You choose what comes in: a chat export you share, or text you select or paste.

No character judgments

Insights are counts and timings. Kepton will not tell you what someone is like — and it is not professional advice.

One large download

The on-device model is about 2.6 GB. Wi-Fi is a good idea. After that, everything runs offline.

Chat exports only

Works with exports you produce yourself. Kepton is not affiliated with, endorsed by, or connected to WhatsApp or Meta.

Android only, for now

Android 12 or newer on a 64-bit phone. No iOS version; the optional keyboard is not part of 1.0.

You are the author

Every draft is a starting point. Read it before you send — Kepton never sends anything for you.

FAQ

Straight answers before you install.

Is Kepton another cloud chat AI?

No. Kepton is an Android app that processes conversations on your phone. It drafts reply suggestions and shows pattern insights from exports you import — it does not upload your chats to Webonika’s servers.

Do I need internet to get reply suggestions?

Only for an optional one-time AI model download you start yourself (with size shown and consent first). After that, suggestions, Insights, and Analysis run offline.

Will replies sound like me?

Drafts are grounded in your own conversation history and optional context you add. Choose Mirror to lean into your learned style with that contact, or pick a tone/character persona for the vibe you want — then review and edit before sending.

What are personas?

Built-in reply styles: tones like Friendly, Professional, Supportive, and Mirror, plus character archetypes like The Wit, The Detective, Casanova, Chanakya, and more. They change how drafts read — they do not upload your chats or label people.

Can Kepton access my messaging apps automatically?

No. It works from chat exports you choose to import, and from text you explicitly select or paste. It does not claim automatic access to your messaging apps.

Is this professional or relationship advice?

No. Insights and Analysis describe patterns in message data. They are not psychological, medical, or legal advice, and they do not assess anyone’s character.

What does it cost?

Kepton is free on Google Play, with no account and no subscription. There are no ads and no analytics SDK in the app.

Where is my data stored, and can I delete it?

On your phone, in encrypted storage. Raw import files are deleted once they have been read. You can delete any chat and everything derived from it at any time inside the app.

Important

You review every draft. AI is a starting point.

Kepton helps you write faster and see conversation patterns. It does not replace your judgment. Outputs are not always correct — edit before you send. Not professional advice; not character labels.

Human reviewNot adviceNot always perfect

Read the Privacy Policy and Terms of Service for how Kepton handles information and what you agree to when using the app.

Get Kepton

Free on Google Play.

No account, no subscription. Try it on the built-in sample chat before you add a conversation of your own.

  • Reply drafts + personas on this phone
  • Pattern insights + on-device Analysis
  • Data Map + network kill switch
  • Encrypted storage; delete anytime
Get on Google Play →

Never blank again.

Free on Google Play. Drafts in your voice, patterns from your chats — without shipping your messages to the cloud.