Freedom251 › AI Note-Taking Apps
Second Brain
What Second Brain is
Second Brain is an iPhone notes app for capturing information and retrieving it through plain-language questions. One chat accepts text, voice notes, and photos. The app infers categories instead of requiring folder filing. Voice recordings are transcribed in the background, while photos receive automatic captions. You can ask questions about saved notes, and answers identify the notes used. Spoken input can also produce list items and scheduled reminders. The maker says notes remain isolated by account, processing requires explicit consent before the first note is processed, and notes are not used to train AI models. All data can be deleted immediately and completely, according to the maker. A free plan allows five text-only messages daily, with a 500-character limit. Pro costs $4.99 a month or $39.99 a year and adds voice, photos, unlimited messages, and answers drawing on everything at once. The interface supports English and Turkish.
Who it suits
Second Brain suits iPhone and iPad users who want conversational note capture, automatic organization, and questions answered from personal notes. It may fit parents, travelers, and homeowners managing appointments, restaurant memories, or contractor quotes.
What it does well
- Captures text, voice notes, and photos in one chat
- Infers categories without folder filing
- Answers questions and identifies source notes
- Extracts lists and schedules reminders
- Offers a free plan
What to know first
- Free plan limits users to five messages daily
- Free messages are text-only and capped at 500 characters
- Voice and photo features require Pro
- Supports iOS and iPadOS only
Plans
| Plan | Billed and limits | Price |
|---|---|---|
| Free | 5 messages a day · text only · up to 500 characters | Free |
| Pro (yearly) | Voice notes with transcription · photos with auto-captions · unlimited messages · answers that draw on everything at once | $39.99 a year |
| Pro (monthly) | Voice notes with transcription · photos with auto-captions · unlimited messages · answers that draw on everything at once | $4.99 a month |
As secondbrainnotes.app lists them, read 10 Oct 2026. The maker's own page has the final word.
Verdict
Second Brain combines conversational capture with automatic transcription, captions, note search, and reminders. The free tier is limited, while Pro removes message limits and adds voice and photo support.
Facts from Second Brain's own pages
- Answers
- Second Brain answers questions from a user's notes and shows which notes it used. · secondbrainnotes.app, 10 Oct 2026
- Capture formats
- Users can capture text, voice notes, and photos in one chat. · secondbrainnotes.app, 10 Oct 2026
- Deletion
- The maker says users can delete everything at any time and that deletion is immediate and complete. · secondbrainnotes.app, 10 Oct 2026
- Designed for
- The maker describes use cases including parents remembering appointments, travelers recalling restaurants, and homeowners retrieving contractor quotes. · secondbrainnotes.app, 10 Oct 2026
- Interface languages
- The app interface is available in English and Turkish. · secondbrainnotes.app, 10 Oct 2026
- Lists and reminders
- The app can extract list items and schedule reminders from what users say. · secondbrainnotes.app, 10 Oct 2026
- Maker
- The app is described as developed by one person, Gökhan Çelikkaya. · secondbrainnotes.app, 10 Oct 2026
- Organization
- The app infers categories and does not ask users to file notes into folders. · secondbrainnotes.app, 10 Oct 2026
- Photos
- Photos receive captions automatically. · secondbrainnotes.app, 10 Oct 2026
- Privacy
- The maker says notes are isolated per account, AI processing requires explicit consent before the first note is processed, and notes are not used to train AI models. · secondbrainnotes.app, 10 Oct 2026
- Product
- Second Brain is an iPhone notes app that lets users capture thoughts and ask questions about them later in plain language. · secondbrainnotes.app, 10 Oct 2026
- Voice
- Voice notes are transcribed in the background. · secondbrainnotes.app, 10 Oct 2026
Where Second Brain stands on Freedom251
- AI Note-Taking Apps#38 of 42