Write down any idea
Tap the add button to write any idea. Not sure where to put it? It goes to your Pending tab — you can sort it later.
Available on the App Store
Organize your
ideas into
trees
Write down any idea in seconds. Add as many sub-ideas as you want. Everything is saved on your phone — no account, no internet needed.
Offline-first
No sign-up needed
Unlimited depth
PDF export
Daily reminders
4 languages
∞
Depth levels
0
Bytes sent to any server
4
Languages
100%
Private, offline storage
How it works
Grow your ideas,
Grow your ideas,
not just a list
Most note apps keep your ideas in a simple list. Idea Think lets every idea grow into its own tree — add as many levels as you need.
Add ideas under any idea
Tap any idea to add more ideas under it. Keep adding as many layers as you want. Your ideas grow like a tree.
See all your ideas as a map
Switch to Tree Map view to see all your ideas at once. Tap any bubble to open it, add more ideas, or go deeper.
Features
Simple tools,
Simple tools,
powerful results
Add ideas without limits
Every idea can be a starting point. Add ideas under it, then add more under those. No limits on how deep or wide your tree can grow.
Launch my startup
Product research
Build MVP
Go-to-market plan
Fundraising strategy
See your ideas as a visual map
See all your ideas as a visual map. Tap any bubble to open it or add more ideas. Pinch to zoom and explore your full tree.
Quick inbox — write now, sort later
The Pending tab is your quick inbox. Write any idea without picking a place for it. When you are ready, move it to the right tree.
Search all your ideas
Search all your ideas at once. Find what you need quickly, no matter how many ideas you have.
Export as PDF or JSON
Save any tree as a PDF to share or print. Export all your ideas as a JSON file for backup.
Pin your most important ideas
Pin any idea to keep it at the top of its list. Great for your most important or in-progress ideas.
Daily reminder
Set a daily reminder to check and update your ideas. The notification comes from your phone only — no server needed.
4 languages
Idea Think is fully available in English, Japanese, Simplified Chinese, and Traditional Chinese — every screen, every button.
🇬🇧 English
🇯🇵 日本語
🇨🇳 简体中文
🇹🇼 繁體中文
Privacy
Your ideas stay yours.
Idea Think has one simple rule: your ideas never leave your phone. No analytics, no crash reports, no ads — nothing is sent anywhere.
Your ideas are saved on your phone using a local database. There is no server, no cloud account — so nothing can be leaked or stolen.
Read the full Privacy PolicyNo data collected
Zero personal data, analytics, or usage events captured.
No account required
Open the app and start. No email, no password, no sign-in.
No cloud sync
Data never leaves your device. On-device Isar DB only.
No ads, ever
No ad SDK, no tracking pixel, no monetisation of your attention.
No Subscription
Pay once. Use forever.
Idea Think is a one-time purchase — no recurring fees, no paywalled features, no upsells. Everything in the app is yours from day one.
- Unlimited ideas & depth
- All 8 features included
- PDF & JSON export
- Future updates included
- No account required
Start organizing
your ideas today
Free to download. No subscription. Your ideas stay on your phone.