Why We Built Krypt as a Native iPhone App — Krypt
Native iOS · fewer dependencies · smaller attack surface
Native iPhone app.<br>Not a cross-platform bundle.
Krypt was built specifically for iPhone rather than wrapped in a cross-platform framework. For a private vault, that choice is not cosmetic — it affects size, dependencies, performance, and how directly the app can work with iOS security features.
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The choice
Cross-platform is convenient.<br>Native is deliberate.
Cross-platform frameworks can be a smart choice for many products. They help teams ship one codebase to multiple platforms, move quickly, and reach more devices.
Krypt has a narrower goal: protect private data on iPhone with as little unnecessary machinery as possible. That made native iOS development the better fit.
Less software
For security tools,<br>smaller can be a feature.
Fewer layers A native app can talk directly to iOS frameworks instead of routing everything through an extra abstraction layer.
Fewer dependencies Every dependency needs maintenance, review, updates, and trust. Reducing them is part of the security posture.
Smaller install size Krypt is intentionally lightweight. A private vault should not need to ship a giant runtime to store local secrets.
Less overhead Native apps usually avoid the extra bridge, runtime, and packaging cost that cross-platform apps often carry.
Attack surface
Complexity is not free<br>when the app stores secrets.
In security software, the question is not only what features an app has. It is also how much code, tooling, dependency surface, and update surface sits between the user and their data.
A larger app is not automatically unsafe, and a smaller app is not automatically secure. But when two approaches can solve the same problem, the simpler one is often easier to reason about, audit, maintain, and explain.
iOS integration
Built for the platform<br>where the vault lives.
Face ID Native iOS development gives Krypt direct access to Apple’s biometric authentication flow.
CryptoKit Krypt can use Apple platform security APIs directly instead of relying on a portability layer.
Keychain Secure key material can be handled using iOS-native storage designed for this job.
Document workflows Files, photos, scans, and imports can follow familiar iPhone patterns instead of generic desktop-style flows.
Size comparison
A private vault should not<br>feel like a freight train.
Krypt is built around the idea that an offline vault can be small, focused, and easy to understand: passwords, 2FA codes, notes, photos, scans, and files stored locally on the device.
When a privacy app ships with a very large binary, it may still be legitimate software. But it also raises a fair question: how much extra framework, runtime, and cross-platform baggage is being carried just to protect data on one phone?
Fair tradeoff
Cross-platform still makes sense<br>for many apps.
This is not a universal argument against cross-platform development. For social apps, dashboards, marketplaces, internal tools, and many business products, sharing code across platforms can be practical and sensible.
But Krypt is not trying to be everything on every device. It is an offline private vault for iPhone. That narrower promise lets the app optimize for native behavior, local storage, and lower complexity.
Where Krypt fits
No cloud. No account.<br>No unnecessary platform layer.
Krypt stores private data locally on your iPhone. There is no Krypt account, no Krypt cloud, and no Krypt server holding your vault.
The native iOS choice follows the same philosophy: keep the architecture smaller, keep the data local, and remove moving parts that do not need to exist.
Related reading
Keep exploring<br>offline privacy.
Why Offline?<br>Why some people prefer a vault without cloud sync, accounts, or servers.
Nothing to Breach<br>Why removing cloud servers changes the security model.
Local-First Privacy<br>Offline by default, portable when needed.
Keep private things private.
Krypt stores passwords, 2FA codes, notes, and files directly on your iPhone — with no account, no cloud, and<br>no sync.
Try Krypt offline →