Independent software studio
Apps that do one thing, properly.
NullTwenty makes focused software for Mac, iPad and Android. Private by default, native to each platform, and priced so you pay once and keep it.
The apps
04 shipping
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Keysi
macOS · menu bar
Hold ⌘ to see every keyboard shortcut of the app you're using, then click any row to run it. Free, with Pro at $14.99 once.
keysi.io → -
Cairn
iPad
A private browser for iPad. Spaces keep sign-ins apart, Cairns bring a whole session back weeks later, and summaries are written on the iPad itself.
App Store → -
Quickspan
Android · phone, tablet, foldable
The private calendar you just type into. Type “Lunch Friday 1pm” and it's on your calendar. No account, no ads, no tracking.
quickspan.app → -
shotfleet
macOS · command line
Captures your App Store and Google Play screenshots in every language from one flow, and checks each one is really in the right language.
shotfleet.com →
How the apps are made
Private by default
No accounts to create and nothing to track. Where there's AI, it runs on your device and your data stays there.
Pay once, keep it
Try it free, then buy it outright if it earns a place on your device. No subscriptions to remember to cancel.
Native, not ported
Swift on Apple platforms, Kotlin and Compose on Android. Each app follows the conventions of the device it runs on.