Second Brain review
A focused iPhone and iPad app for turning personal captures into searchable recaps.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Second Brain is an AI note-taking app for iPhone and iPad users who want to capture personal information conversationally and revisit it later. It supports text, voice, and photo capture, then lets users ask natural-language questions about saved notes. Voice notes can be transcribed, photos can receive automatic captions, and the app can organize information into inferred categories, lists, reminders, and agenda items. Its focus is personal memory retrieval rather than team documentation or broad workplace collaboration.
The plan structure is straightforward. The Free plan includes text notes and questions, with five messages per day. Pro Monthly and Pro Annual add voice-note transcription, photo auto-captions, and unlimited messages. That makes the free tier suitable for light text-based capture, while users who regularly record audio, save images, or ask frequent questions need one of the Pro plans. The published plans emphasize capability differences more than a wide range of feature tiers.
Second Brain’s strongest distinction is the combination of multimodal capture and automatic recall. Answers can draw on multiple notes, while inferred categories reduce the need for manual filing. Daily and weekly AI recaps add a passive review layer for users who want their captured information brought back into view. The trade-off is a narrow platform footprint: the product is positioned for iPhone and iPad, so it is less suitable for people who need access across a broader device ecosystem. Choose it for automatic personal recaps and conversational access to memories; consider another app if cross-platform availability or collaborative note-taking is central to your workflow.
Second Brain pros and cons
- Where it wins
- Captures text, voice notes, and photos in one chat-style interface
- Answers questions across multiple saved notes in natural language
- Creates daily and weekly AI recaps with reminders and agenda items
- Where it doesn't
- The Free plan allows five messages per day
- Voice transcription and photo auto-captions require a Pro plan
- Available for iPhone and iPad rather than broader platforms
Second Brain fact sheet, pricing and score →
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