Fast, native outliner for macOS and iOS with iCloud sync and Markdown support.
Product memo
Kosshi delivers a fast, native outliner experience for macOS and iOS users. It focuses on privacy through local data storage and iCloud sync, avoiding developer servers entirely. This approach targets users who manage large, hierarchical outlines and value data ownership, offering a pay-once alternative to subscription-based cloud tools.
For who
macOS and iOS users needing fast outliners
Solves what
Fast, native outliner for creating and managing hierarchical notes and tasks.
- Native macOS/iOS app
- iCloud sync and privacy
- Handles large outlines
In their own words
Kosshi Outliner
Simple, fast outliner for Mac and iPhone
Data is stored locally on your device. Sync between devices uses Apple's iCloud (CloudKit) — sync data lives in your iCloud account and never passes through a developer server. Without server costs, the app is pay-once with no subscription. No sign-up required.
Commercial cues
Model
one time
Free tier
Yes
Trial
7d
Pricing Strategy
- • One-time purchase removes subscription friction for privacy-conscious users.
- • A 7-day free trial encourages adoption by reducing upfront risk.
Operator context
Operating setup
Team
Indie / lean
LLM classification
Founded
May 2026
HQ
United States
Platform
Desktop
Audience
General
Social footprint
Market demand
Kosshi keyword demand
5 keywords
Market demand is Starter-tier market intelligence.
Derived from this product’s latest SimilarWeb keyword mix — directional demand, not proof.
Builder Strategy
- Strategy Type
- Niche Specialist
- Stage
- Bootstrapped Lean
- Effort
- Solo Buildable
About Kosshi Expand
Kosshi provides a native outliner experience for macOS and iOS, designed for users who need to manage hierarchical notes and tasks efficiently. It emphasizes speed and privacy by storing data locally and using iCloud for synchronization, ensuring user data never passes through developer servers.
This allows for a one-time purchase model, setting it apart from subscription-based alternatives. The app includes Markdown support, handles large outlines, and offers zoom functionality, catering to power users who prioritize data ownership and a simplified workflow.