壱 The opening page
Kogasa Studio
The first page of the book carries the studio’s own seal, 小傘. Founded in Switzerland in 2026, to make a few apps worth keeping and to look after them.
After the rain · 雨上がり
Less slop.
More colour.
The App Store is full of apps nobody cared about. We take the time others skip: our own drawings, careful words, the small details. Every app gets its own colour and its own seal.
御朱印帳 · goshuinchō
The stamp book
At Japanese temples, visitors collect a page of brush writing and a red seal. We keep a book like that for our apps. Each app earns a page, its own seal and the studio's mark when it ships.
弐 Now under the umbrella
FoilFold
Magic: The Gathering collection tracker
The fastest offline-first way to track your Magic collection. Find any card in an instant, add it in seconds, and always know what your collection is worth.
- Instant search across every card and printing, even with typos
- Works offline: your collection is always there, no connection needed
- Syncs through your own iCloud, with no account and no tracking
- Collection value at a glance, from current market prices
iPhone · iPad · Mac
Coming soon to theApp Store
foilfold.com
参 Not yet
The next page
Left blank until the next app is ready. 未 means not yet: no seal until it has earned one.
心得 · kokoroe
How we work
Kokoroe are the things a craftsman keeps in mind. Ours are eight, each named after a Japanese saying.
tekizai tekisho · the right material in the right place
Native, Apple only
We build only for Apple platforms, in Swift and SwiftUI. Each app uses what the system already does well, from widgets to iCloud, instead of imitating it.
omoiyari · consideration for others
Inclusive
Every app supports VoiceOver, Dynamic Type, Reduce Motion and clear contrast from the first release. If someone cannot use it, it is not finished.
hisureba hana · what is kept hidden is the flower
Privacy first
No Google products, no analytics, no tracking and no ads in our apps. Your data stays on your device and in your own iCloud. We do not collect it, because we do not want it.
ichigo ichie · one time, one meeting
Companions, not traps
Every moment happens only once. Our apps help with a task and then let you go: no streaks to guilt you, no endless feeds, no notifications begging for attention.
sonae areba urei nashi · be prepared and there is nothing to fear
Offline first
Our apps work without a connection. The network is for syncing and updates, never for the basics.
taru o shiru · know what is enough
Only what matters
We add what makes an app better and leave out the rest. No bloat, no dark patterns, no feature built just to fill a list.
kaizen · change for the better
Kept well
Shipping is the start. We keep every app up to date with each new system release and keep improving it, a little at a time.
garyō tensei · painting in the dragon's eyes
The human touch
A painter's dragons came alive only when he added their eyes. AI helps us build the dragon; we paint the eyes ourselves, with our own drawings, careful words and the small details that make an app feel alive.