ObsiKO: AI Note + Mindmap

StudioHyZet

About this app

Tired of converting files or picking plugins? Spent the day on settings and never wrote a line? Plenty of features, none of them talking to each other?

Writing, knowledge management, mind maps, reading logs, codices, schedules, file conversion — all in ObsiKO, with no login, payment or subscription. Obsidian vaults (.md·.canvas·.base) open as-is.
(AI uses your own API key. The app works fully without one.)

■ Made for Android
· 7 home screen widgets — check off to-dos right from the Schedule widget
· Long-press the icon for quick actions. Make ObsiKO your default notes app and S Pen memos land here (Android 14+)
· Save text, photos, PDFs and hwp files from any app via Share
· On tablets, pin the side panel beside the editor and read books in two pages

■ Built for Korean
· The ObsiKO Korean Dictionary and spell checker, from the National Institute of Korean Language's data — no key

■ A focus timer that runs without the app
· A dial like a real pomodoro clock — tap or drag the ticks in 1-minute steps
· Start and pause from the home screen widget; time left in the notification shade and on the Lock Screen (a status bar chip on Android 16+)

■ Share and sync (GitHub)
· "Share to the web" opens a note at one address — theme, tables, images, comments. Stored in your GitHub, not on our servers
· Sync devices through your own repository. Share your LLM wiki as one file or a subscription link that follows your edits

■ Write once, it connects itself
· One "color" property tints tabs, headers, tree icons, .base and codex cards
· Type "book" and a search fills in the rest; "project" adds dates to the calendar
· Highlight a PDF and quotes collect in a matching note

■ A graph like the night sky
· Links, types, relations and PARA form one constellation — more links, brighter stars
· Names appear as you zoom in, and your layout is remembered

■ Infinite mind-map canvas (.canvas)
· S Pen and stylus drawing, sketches into AI images. Ask the AI and it builds, sizes and colors the map
· Grow cards with Enter and Tab, drop in URLs and files. 5 styles, 10+ presets, auto-built maps & dungeons

■ .base files and search
· Projects, kanban, cards, charts, a library, PARA and a budget. Dataview queries become tables
· Search filenames, full text, Korean jamo, meaning and word forms — semantic search runs on the device, no key

■ Dashboard, themes and Markdown
· 50+ widgets — calendar, habits, stats, mini games, AI briefing, tarot. 20+ themes, your own fonts
· Editing tuned for Korean, a format bar, Mermaid, 20+ charts, inline drawing, embeds

■ Writing helper
· 70+ structures across 13 genres (Hero's Journey, Save the Cat, TRPG characters, world sheets)
· Socratic questions, genre feedback, style polish, your own assistants, on-device translation, read-aloud

■ Schedules
· A date in any file lands on the calendar (Obsidian Tasks compatible) — year to timeline views, widgets, writing reminders

■ Viewers from one line of front matter
· Book view (two pages, page turns that follow your finger, covers in the note's color), web-novel view (platform presets)
· Messenger and visual-novel views — record the screen and it's a short

■ Clip, convert, export
· Web clipper and RSS. Import from Apple Notes, Notion, Evernote, Bear, Logseq and Roam
· doc, docx, PDF, hwp and hwpx to Markdown. Photo text read on the device; scans, video and audio transcribed with AI
· Slides with Marp. Export to PDF, HWPX, DOCX, EPUB, HTML, ZIP and wikis

■ AI agent
· Just add an API key (Claude, Gemini, GPT) — the app works fully without one
· Mind maps and tables on your phone, voice input, and a plan card before big changes
· Auto memory, LLM wikis, Zettelkasten folders, slash commands, a prompt helper, MCP

No login, no payment, no subscription, no ads. Tell us about bugs anytime.

■ Supported
· Android phones and tablets / Korean, English, Japanese, Chinese (Traditional, Simplified)
· Mac and Windows apps add the full AI agent

What’s new

■ New in 1.4.3

- Focus timer widget dial — starts without opening the app
- Fixed reminders not ringing
- Graph view as a real night sky
- E-book viewer — finger-follow page turns, two pages on tablets
- An animated logo at startup
- AI mind maps lay themselves out
- Share your LLM wiki — .opack file · subscription link
- Choose how the AI may change notes
- AI chat — mic, links, photos, recordings
- Spell check — [Stop flagging]

+ Improvements and bug fixes