Native apps that don't waste your attention.

We build small, focused tools for macOS, iPhone and Android. One payment, no ads, no subscriptions, no account to create. Most of them keep working with the network turned off, because they never needed it.

apps on the App Store

platforms

ads, ever

Published

What we've shipped

Every one of these is on the App Store today. They're small on purpose: each does one job, and does it without asking for anything it doesn't need.

RarKit

Opens RAR, ZIP and 7Z archives — and verifies both ways, so it never reports success on a file it couldn't actually read.

macOSUtilities$0.99

NetPulse

A speed test tells you how fast your connection is right now. NetPulse watches it over time, so you can prove the drop actually happened.

macOSUtilities$0.99

US Citizenship Test 2026 Oral

The real interview is a conversation: an officer asks out loud and you answer out loud. This one practises it that way — and nothing you say leaves the phone.

iPhoneEducationFree

Dim

A Safari extension that makes every site dark — including the ones that never built a dark mode of their own.

macOSUtilities$0.99

Platforms

Built natively, twice

We don't wrap a website and call it an app. Each platform gets code written for it — which is slower, and is the reason these feel like they belong on the device.

Apple

Swift and SwiftUI on macOS and iOS. Sandboxed, signed, and shipped through the App Store.

4 apps live

Android

Kotlin and Jetpack Compose, targeting the current API level. Same rule as everywhere else: no ads, no tracking, no analytics SDK.

In development

Offline first

If a tool doesn't need the network to do its job, it doesn't get network access. It's the kind of promise you can check by inspecting the app.

Across the catalogue

Approach

How these get made

Before writing an app we read what people say about the ones that already exist. The complaints are the specification.

Measured, not guessed

Each app starts by reading thousands of reviews of the existing ones. What people complain about most is what gets built first.

Honest when it doesn't know

A tool that invents a number is worse than one that says "no reading". When the data isn't trustworthy, our apps say so instead of showing something.

Pay once

No subscriptions, no ads, no upsell in the middle of what you were doing. Under a dollar, most of the time.

Nothing leaves the device

No accounts, no servers, no analytics. Several of our apps don't even request network permission — so it isn't a promise, it's a fact you can verify.

Gustavo Gravina

Founder & developer

LAP478 designs and builds native software from Buenos Aires. Every app on this page was designed, written, tested and shipped in house — which is exactly why they stay small, and why there is always someone accountable when something breaks.

If you found a bug, or something in one of these apps doesn't do what it promised, write to us. We read all of it.

supportlap478@gmail.com

Location

Buenos Aires, Argentina

Developer

On the App Store