Second Brain app icon

Apps Like Second Brain for iPhone and iPad

Organize thoughts and manage ideas

Organize thoughts, ideas, and memories with note-taking and tagging. Create to-do lists and journal entries. Track workout progress and business ideas. Search and categorize content for easy retrieval. Sync across devices for consistent access.

by Simon Jakobsson★ 5.01 ratingsProductivity$3.99Data updated 2026-09-06

Ranked alternatives

Showing 321–340 of 1,000 ranked alternatives.

  1. FieldX Mobile app icon

    FieldX Mobile

    FieldX Inc.

    Record observations and actions in the field

    Record scouting observations and recommended actions with customizable forms. Enter data for multiple fields simultaneously. Copy and paste between forms. Edit historical entries. Email PDF reports. Function offline without internet.

    ★ 4.01 ratingsProductivityFreeData updated 2026-09-06
  2. Zeze app icon

    Zeze

    Sharat Dhananjaya

    ★ 5.02 ratingsLifestyleFreeData updated 2026-09-06
  3. 999 3rd app icon

    999 3rd

    Equity Office Management, LLC

    ★ 2.49 ratingsProductivityFreeData updated 2026-09-06
  4. Diary, Journal, Mood - memoir app icon

    Diary, Journal, Mood - memoir

    Mohammad Elzahaby

    Reflect on moments and save memories

    Capture daily thoughts and experiences with a minimalist interface. Write quick notes or longer entries. Organize entries by date. Export entries as text or PDF. Set reminders for daily reflections. Share entries via email or social media.

    ★ 4.719 ratingsProductivityFreeData updated 2026-09-06
  5. Tallymander app icon

    Tallymander

    Danilo Campos

    Count items, track totals, update instantly

    Track counts with grouped, list-based entries. Customize each counter with specific settings. Perform real-time calculations and view statistical measures. Export and share data through various formats.

    ★ 4.010 ratingsProductivityFreeData updated 2026-09-08

How we rank alternatives

Apps are ranked by functional similarity, category fit, rating confidence, and popularity.