Your ideas, yours alone.
IdeaNook uses on-device AI to capture, categorize, and summarize everything you think — your data never leaves your phone. No cloud. No servers.
iOS 26.0+ · Android & HarmonyOS in progress
Fully on-device AI
Gemma 3n E2B multimodal model runs locally on your device — zero network requests.
Privacy by design
Data lives only in the app sandbox. No network permission, ever uploaded.
Chat-style capture
Just text yourself — drop in text, photos, or voice with one tap.
As simple as texting yourself
When inspiration strikes, just send it. Text, photos, and voice all flow into one idea stream — zero learning curve.
Jot it down
Send a thought the moment it arrives — natural as a chat.
Snap what you see
From camera or library in one second, with full-screen zoom.
Can't type? Just say it
Hold to record, release to send. AI organizes it for you.
Send and forget — AI files it for you
After each text message, on-device AI decides its category instantly — no waiting, no data leaving your phone.
Send
Write down any thought
Sorting
A “⏳ sorting” chip appears
Tagged
Turns into a real category tag
Browse
See all ideas of one kind
10 smart categories, all inferred locally
What did you record this week? AI turns it into a digest
Reviews that actually matter. Every digest is generated on-device — the content never leaves your phone.
Automatic weekly digest
A Sunday-evening notification reminds you; reopen the app to auto-generate last week's review. Daily digests optional.
Trigger anytime
Today, this week, or a custom range — generate a summary whenever you want.
Summarize from here to now
Long-press any message to build a tailored review of any time span.
An input bar redesigned for iOS 26
Built on iOS 26's native Liquid Glass — three elements flow and breathe as one. Switch text ⇄ voice in a tap; the + menu morphs into the send button intelligently.
- Native .glassEffect() fluid material
- Text/voice modes switch with SF Symbol replace animation
- Hold to talk enters a clear red recording state
Your thoughts stay on your phone
Privacy isn't a feature — it's the baseline. IdeaNook makes data leaks architecturally impossible.
Zero network requests
The app requests no network permission, so it simply cannot upload data.
Data never leaves
Everything lives in the app sandbox; even system backups stay under your control.
AI runs locally
Gemma 3n E2B runs on your iPhone — no cloud API is ever called.
Minimal permissions
Photos write-only, microphone & camera on demand — used then released.
Built for the curious
An all-Apple native stack with on-device multimodal inference. We keep the complexity so you get the smoothness.
Gemma 3n E2B multimodal
Google's on-device multimodal LLM — text + vision + audio.
LiteRT-LM engine
C++ runtime wrapped in a Swift package, accelerated by Metal GPU.
SwiftUI + SwiftData
An all-Apple native stack using the latest iOS 26 APIs.
iOS 26 Liquid Glass
Native .glassEffect() / GlassEffectContainer APIs.
Lazy thumbnail pipeline
CGImageSource generates thumbnails without decoding originals — buttery lists.
Local SwiftData sandbox
All data stays in the app sandbox, with optional encrypted iCloud backup.
Start capturing every idea
Join the TestFlight today and be first to try a fully on-device, truly private idea journal.