Building software that lasts.

In an era of disposable web apps, deprecation cycles and breaking updates, Arcwhin builds self-contained tools designed to run reliably for years. They are released when they are ready, and never because a roadmap says so.

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Android SMS Gateway

Hiras SMS

Turns an Android phone into a local SMS gateway.

Learn more Get Hiras SMS

The Hiras SMS control centre, showing the gateway online and serving on a local network address. — Hiras SMS, running as a gateway on a local network.

That screen is the whole product. Hiras SMS runs on one Android phone and turns it into a self-hosted SMS gateway on your own network. You tap Start, the app shows the local address it is serving on and the key that authorises requests, and anything else on the same network can then send a text through that phone's SIM over a small REST API. There is no cloud service in the middle and no per message fee, because the messages leave through your own SIM at your carrier's usual rate.

Browser extension · Available

Haul

Finds every image and video on the page you are viewing and downloads one, a selection, or all of them.

Install from Microsoft Edge Add-ons Read the privacy policy

The Haul sidebar beside a gallery page, showing the images it found as tiles with three selected.

A browser extension with no account, no analytics and no server, so nothing it sees leaves the machine, as its privacy policy sets out. It refuses to run on YouTube, because both extension stores forbid downloading from there.

Two entries, and both are finished. An idea stays an experiment until it earns a place here. Most ideas never get that far, and the ones that have not are not listed as coming soon, because a name on a roadmap is not a product.

Fewer things, made properly.

Build with intention.

Every product begins with solving a real problem, not chasing a trend or filling a slot on a roadmap. The first question is whether the thing should exist at all, and the honest answer is often no. What survives that question gets built narrowly and on purpose. Hiras SMS sends text messages through a phone you already own, and it does not try to grow into a bulk messaging platform, a campaign tool or a CRM. Deciding what a product will never do is as much of the work as deciding what it does, because a feature that is not there cannot break, cannot confuse anyone, and does not have to be carried for years.

Privacy by default.

Your data belongs to you wherever possible. A feature collects what it needs to work, and nothing beyond that. In practice the default is no collection at all. Hiras SMS has no analytics, no telemetry and no crash reporting, because there is no service behind it to send anything to, and the history of what you have sent stays in storage on the phone until you clear it. Permissions are asked for at the point a feature genuinely needs one, not gathered up front. Privacy that depends on a setting is not really privacy. It is a default you have to go and find.

Quality over quantity.

One product released properly is worth more than ten left unfinished. Shipped means ready, and it means it stays working. Ready includes the parts that are easiest to skip: documentation written alongside the software instead of reconstructed afterwards, and a plain account of the limits. Hiras SMS ships with a dry run mode so you can exercise the whole send path without spending a text, and its documentation states outright what it cannot tell you, such as whether a carrier really delivered a message. Being clear about a limit costs a little on the day and saves someone an afternoon later.

Arcwhin is an independent software publisher, and that word is the deliberate one.

A publisher keeps a small catalogue and stands behind every entry in it, rather than shipping whatever fills the quarter. Each product is meant to be self-contained: it runs on hardware you already own, it does not depend on a service that could be switched off later, and there is no account to create with us before it will work.

Questions about either product, a bug to report, or something else entirely.

arcwhin.support@gmail.com