RAI — Real AI on your phone. By Aerendir.

The Apps

Two apps. One platform.

Every RAI app runs on the same on-device foundation — flip a switch to use cloud models when you want speed, or keep everything local when you want privacy.

Available now

RAI Assistant

v1.0 · Android 8.0+

A voice-first AI assistant for Android. Flip the Private Memory toggle to switch between blazing cloud voice and full on-device privacy.

~150ms voice in cloud mode via WebRTC
Local LLM + RAG memory in on-device mode
Real tools — contacts, SMS, Gmail, system info
Context-aware — adapts to battery, motion, network

Open RAI Assistant

Available now

RAI Inbox

v1.2 · Android 7.0+

AI-powered email for Android. Voice commands, smart compose, multi-account support — with the same on-device-or-cloud choice.

"Hey RAI" voice commands — reply, archive, search hands-free
AI Smart Compose — drafts in your voice, not a chatbot's
Multi-account — Gmail, Exchange, IMAP in one unified inbox
Smart Boxes — auto-categorize newsletters, receipts, cold mail

Open RAI Inbox

Why RAI

The platform underneath.

Every app in the RAI suite is built on the same foundation. Four things we got right so the apps can stay light, fast, and yours.

On-device option

Every app can run its AI entirely on your phone. No network required, no cloud lock-in. We continuously roll in the best on-device models available.

Cloud when you want it

Real-time WebRTC voice. Premium reasoning models. ~150ms response. The fast lane is one toggle away, and we never default you into it.

Encrypted local memory

Conversations and context live in an encrypted vector database on your device. Search semantically. Back up if you want to. We don't read it.

Zero telemetry

No analytics SDKs. No usage tracking. No crash reports phoning home. The apps don't even know how often you open them, because that's none of our business.

Roadmap

Where we're heading.

Two apps shipped. More coming, and a few platforms in active development.

In progress

iOS apps

SwiftUI rebuilds of both RAI Assistant and RAI Inbox. Same cloud-or-on-device toggle, same memory format, same brand.

In progress

Web companions

Pick up conversations on your laptop, push back to your phone. Browser-first interface for when typing beats talking.

More apps in the family

Calendar, notes, files. The same platform, the same trade-offs. The next things you do on your phone every day, with AI that actually respects them.

Built by Aerendir.

We're a small team building real AI tools for real phones. We started RAI because the AI in your pocket today is mostly an interface to someone else's server — and we don't think that's good enough for the device you spend the most time on.

Every product we ship has a fully on-device mode. Every one is privacy-first by default. Every one is owned by you, not us.

Learn more about Aerendir

FAQ

Questions, answered.

The most common things people ask when they first land here.

What's RAI, exactly?+

RAI is a family of AI apps for Android, built by Aerendir. Two apps are shipping right now — RAI Assistant (voice-first AI assistant) and RAI Inbox (AI-powered email). Both share the same platform: on-device AI by default, cloud when you want speed, your data stays yours.

Which app should I start with?+

If you want a conversational AI you can talk to about anything, start with RAI Assistant. If you spend a lot of time on email and want AI replies, smart compose, and auto-categorization, start with RAI Inbox. They work great independently and even better together.

Why on-device AI?+

Three reasons. (1) Privacy — your data never has to leave your phone. (2) Reliability — it works without a network, on a plane, in a basement. (3) No lock-in — the model lives on your device, so we can swap in better local models as they ship without your data ever changing hands. Cloud mode is still there when you want raw speed.

Are the apps free?+

The apps are free during beta. On-device mode will stay free forever — no subscription, no usage caps. Cloud mode uses paid model APIs; we may introduce a Pro tier for heavy cloud usage in the future, but the core experience will always have a fully-free, fully-local path.

Why isn't RAI on the Play Store?+

We're in open beta and Direct APK distribution lets us iterate faster — every push hits users instantly, no review queue. Play Store listings are on the roadmap once we cut stable 2.0 builds for both apps.

What about iOS or the web?+

Both in active development. iOS rebuilds are SwiftUI from the ground up, sharing the same memory format and toggle UX. Web companions will let you pick up conversations on your laptop and sync back to your phone.

Who makes RAI?+

Aerendir Mobile Inc. — a small, independent team building on-device AI products for mobile. Learn more at aerendir.info.

Phones got dumber.
We're fixing that.