v1.0 Available for Android 7+

Stop Switching Apps
To Use AI.

The native Android toolbar extension that brings Gemini 2.5 Flash directly into WhatsApp, Slack, and Gmail. No copy-pasting required.

Download APK How it Works

Local-First BYO-Key Open Source

What You Get

Four AI actions embedded directly in your text selection toolbar. Works in every app.

Native Integration

Select text → Tap "AI Rewrite" → Done.

9:41

Did you send the invoice?

Yeah i did it already

Copy Paste Rewrite

AI Suggestion

"Yes, I have already sent it."

Replace

Refine

Writing Contexts

Switch between Professional, Casual, and Technical profiles. Each context carries its own tone rules, vocabulary, and learned preferences.

$0 Monthly Cost

No servers, no subscriptions, no markups. You use your own free Gemini API key (15 requests/min, 1500/day).

It Learns Your Style

Refine a suggestion once, and the app remembers. Smart compaction distills your corrections into a lightweight writing profile — stored entirely on-device.

formal_mode: true no_emojis: true

> User rejected "Cheers"
> User prefers "Best regards"
> Rule learned.

Word-Level Diffs

See exactly what changed. Removed words and added words are highlighted so you always know what the AI did.

How it Works

Four steps. Two seconds. No app switching.

Select text in any app

Long-press to select text in WhatsApp, Gmail, Chrome, Telegram, Samsung Notes — anywhere text selection works.

Tap an AI action

Choose from AI Rewrite, Fix Grammar, Make Formal, or Summarize in the floating toolbar.

Review the AI result

A minimal overlay shows the suggestion with word-level diffs. Powered by Gemini 2.5 Flash with your writing context applied.

Accept, Refine, or Reject

Accept replaces the text in-place. Refine lets you edit and teaches the AI your preference. Reject dismisses — no changes.

Built for Privacy

No keyboard replacement. No clipboard access. No analytics. Your text stays yours.

HTTPS Enforced

All network traffic is encrypted. Cleartext HTTP is blocked at the OS level via network security config.

AES-256 Encrypted Key

Your Gemini API key is encrypted with AES-256-GCM via Android's EncryptedSharedPreferences, backed by hardware Keystore.

Zero Analytics

No Firebase. No Mixpanel. No telemetry. We literally cannot see what you type, how often you use it, or anything else.

Backup Excluded

Your API key is excluded from Android cloud backups and device transfers. It never leaves your device unencrypted.

Read the full Privacy Policy

v1.0.1 — Stable Release

Get AI Selektr

Free, open-source, no account required. Just download, enter your free Gemini API key, and start using AI in any text field.

Download APK 1.7 MB View Source

1.7 MB

APK Size

101

Unit Tests

API 24+

Android 7.0+

Forever Free

Quick Setup (2 minutes)

1. Download and install the APK (enable "Install from Unknown Sources" if prompted)
2. Get a free Gemini API key from Google AI Studio
3. Paste your key in the app — that's it. Go select some text!