Lucid: Second Brain
Goo wong Kwon Productivity iPhoneiPadiPod touch
Lucid: Second Brain is a free Productivity app for iPhone and iPad by Goo wong Kwon. Requires iOS 17.0. Updated June 25, 2026.
- Price
- Free
- on the App Store
- Size
- 2 MB
- Age 4+
- Updated
- Jun 25
- 2026 · v1.1.2
Screenshots
About Lucid: Second Brain
Ever had a great idea, written it down, and never found it again? Notes apps just pile up. All-in-one tools get overwhelming. Lucid sits in between. ■ Catch the 3 seconds it lives Tap the home screen widget and start typing. Don't pick a type or a place — just get it down. ■ Organize in 5 minutes a day Swipe through your thoughts and answer one thing: "Where does this go?" No jargon — Projects, Areas, Resources, Archive. ■ Today, only what matters Open the app and today's tasks come first. Each one done is a small win. ■ Your second brain, in your hand No account, no login. Every thought stays safe on your iPhone. Stop losing your best ideas. Let Lucid remember them for you.
What’s new
Version 1.1.2 · Updated June 25, 2026
• Fixed a few labels that showed up in Korean on English devices. • Minor fixes and polish.
App privacy
The developer, Goo wong Kwon, reported these privacy practices to Apple.
Data Not Collected
The developer does not collect any data from this app.
Alternatives to Lucid: Second Brain
Looking for apps like Lucid: Second Brain? Here are 6 similar apps on the App Store. The highest rated is Clarity Vault (5.0/5), and all 6 are free to download.
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Pensuo: Goal Mate
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JikuDeck
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Clarity Vault
5.0
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Tempo: Calm To-Do & Focus
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CutieDo
5.0
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ReadyList - Daily Checklist
| App | Rating | Price | Last updated |
|---|---|---|---|
| Lucid: Second Brain | – | Free | June 25, 2026 |
| Pensuo: Goal Mate | – | Free | Oct 7, 2025 |
| JikuDeck | – | Free | Feb 27, 2026 |
| Clarity Vault | 5.0 / 5 (1) | Free | May 31, 2026 |
| Tempo: Calm To-Do & Focus | – | Free | Jun 23, 2026 |
| CutieDo | 5.0 / 5 (1) | Free | Jan 24, 2026 |
| ReadyList - Daily Checklist | – | Free | Sep 21, 2026 |