Calm card game
Still13
Pyramid Solitaire with calm modes, readable cards, hints, stats, sound, and no account or ads.
Independent app studio
iPhone, iPad, and Mac-friendly tools
Small, focused apps for everyday use.
Zhen Chyi Apps builds calm, privacy-minded apps for screenshot notes, packing lists, card games, travel moods, and App Store ranking checks. Public apps come first here, with clear download, privacy, and support links.
Available apps
Download, open details, or check privacy quickly.
Screenshot notes
ShotMark
Save screenshots with notes, folders, OCR search, export, and optional iCloud sync.
Packing lists
IsoPack
Trip packing with presets, templates, progress tracking, offline use, and Pro iCloud sync.
App Store ranking checks
RankHalo
Check App Store rankings across countries, categories, and subcategories in a focused tracker.
Coming soon / in development
Public pages are available; App Store downloads are not live yet.
Travel moods
Wanderly
A travel mood app in development for weather, local time, place search, and ambient sound.
Car feel notes
CarSense
A car feel journal in development for steering, throttle, ride, and ownership impressions.
Internal tools
Documented for support and privacy clarity.
YH
Internal app
Internal knowledge hub
Y.E.S Hub
An internal iPad knowledge hub for agency training materials, saved references, and quick lookup.
Support
One support path
Questions, bug reports, purchase help, and privacy questions all start from the same support page.
Privacy and support
Local-first by default, with clear notes for each app.
Still13
Privacy-first
Still13 stores gameplay progress, preferences, and stats on device. It does not require an account, show ads, or track players.
ShotMark
Privacy-first
ShotMark keeps your saved cards on device by default. Optional iCloud sync uses your Apple account, and the app does not use ads or third-party tracking.
IsoPack
Privacy-first
IsoPack keeps trips and packing data local by default. Pro iCloud sync is optional and uses Apple iCloud; no account is required by the developer.
RankHalo
Privacy-first
RankHalo stores tracked apps, pinned markets, alerts, and settings on device. It uses Apple public App Store endpoints for rank data and StoreKit for purchases.
Wanderly
Privacy direction
Wanderly is planned without accounts, ads, microphone recording, or unnecessary tracking. Place and weather services will be used only to power the experience.
CarSense
Privacy direction
CarSense is still in development, but the privacy direction is local-first with no account requirement and no unnecessary data collection.
Y.E.S Hub
Internal privacy
Y.E.S Hub is for internal agency use, with local preferences, optional cached files, and only the account or storage access needed to open shared materials.