Comparison

Messo vs ObsiKO

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Messo

Features
Read full description

Messo is a simple to-do list, task manager, and notes app that helps you organize everyday tasks in one clean, flexible space. Create to-do lists, add tasks, track important dates, and keep notes together — without switching between multiple apps. Use spaces to separate your work, personal life, and important events, so everything stays clear and focused. Stay organized with to-dos and tasks Create simple to-do lists and individual tasks Check items off and track progress at a glance Focus on what needs to be done today Organize everything in spaces Separate work, personal tasks, and events Keep related items together in one view Switch between spaces as your priorities change Available widgets Messo lets you add different widgets to each space: To-Do — simple checklists for everyday tasks Task — individual tasks with progress tracking Countdown — track birthdays, events, and deadlines Time Since — see how much time has passed since an important date Notes — write quick thoughts and reminders Clock — view the current time for selected locations Clean and distraction-free Minimal design that’s easy to scan No complex setup or unnecessary features Designed for clarity and daily use Messo is ideal if you’re looking for a lightweight to-do app that combines tasks, lists, countdowns, time tracking, and notes in one simple workspace.

About

ObsiKO

This app integrates writing, knowledge management, and mind mapping with AI assistance. It supports various file formats and offers unique features for Korean language users, including a focus timer and GitHub syncing for secure data management.

Highlights
  • AI-assisted writing and mind mapping
  • Supports Obsidian vaults (.md, .canvas, .base)
  • Korean dictionary and spell checker
  • Lock Screen focus timer
  • GitHub sharing and syncing
  • Automatic note connection and organization
  • Infinite mind-map canvas with Apple Pencil support
Features
Read full description

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. With Apple Intelligence on, no key needed.) ■ Made for iPhone Duo · Folded: floating glass buttons and your favorite menus on the right strip · Unfolded: an iPad-style layout with a pinned side panel, books in two pages · Half-folded: the app on top, the keyboard below — like a small laptop ■ Built for Korean · A Korean dictionary and spell checker from the National Institute of Korean Language's data — no key · A "Korean word of the day" widget ■ A focus timer on your Lock Screen · A dial like a real pomodoro clock — tap or drag the ticks in 1-minute steps · Start from the widget without opening the app; time left on the Lock Screen, in StandBy and the Dynamic Island ■ 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 note of the same name. Define your own types and relations ■ 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) · Apple Pencil 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. Find books and papers, or just ask Siri ■ Dashboard, themes and Markdown · 50+ widgets — calendar, habits, stats, mini games, AI briefing, tarot. 20+ themes, your own fonts · Calm 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 · One search across dictionaries, thesaurus, hanja, proverbs and Wikipedia ■ 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. Codex view with auto profile icons ■ 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, a reference view for dozens of formats, AI OCR and transcription · 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 · iPhone, iPad, Mac, Apple Watch / Korean, English, Japanese, Chinese (Traditional, Simplified) · Ready for iOS 27 and iPhone Duo

Screenshots

Messo4 screens
ObsiKO4 screens

Verdict

The call

The clearest difference is device support: ObsiKO at 4 against Messo's 2. ObsiKO also leads on iOS requirement (15.1 vs 17.6). On price, update cadence, ads and in-app purchases there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Messo ships an update every 4 days, ObsiKO every 6 days. The most recent releases landed on October 28, 2026 and October 25, 2026 respectively.

Scorecard2 real differences · 7 level
Messo versus ObsiKO: the parameters behind the verdict, then further details
ParameterMessoObsiKO
PriceFreeFree
Rating—5.0 (1 ratings) — better
Number of ratings—1 — better
Update frequencyEvery 4 days — betterEvery 6 days
AdsNoNo
In-app purchasesNoNo
Monetization—Free
DevicesiPhone, iPadiPhone, iPad, iPod, Apple Watch — better
Requires iOS17.615.1 — better
Further details — not scored
Size81 MB77 MB
Age rating4+4+
DeveloperStas MorozovHyojin Kim

In-app purchases

None

Messo

No in-app purchases

None

ObsiKO

No in-app purchases

Questions

Is Messo free?
Messo is free to download, with no in-app purchases.
Is ObsiKO free?
ObsiKO is free to download, with no in-app purchases.
Do Messo or ObsiKO have ads?
Neither Messo nor ObsiKO shows ads.
Which is updated more often, Messo or ObsiKO?
Messo ships an update every 4 days, and ObsiKO every 6 days. Most recently, Messo was updated on October 28, 2026 and ObsiKO on October 25, 2026.

Other comparisons