Considus

Software, considered.

To build a small number of tools that earn their place in people's lives. Made with care, priced honestly, and built to last.

Our story

One person.
No shortcuts.

There is one person here. No team, no investors, and no roadmap driven by a growth target.

The studio was founded in 2026, after the UK government's removal of Advanced Data Protection from iCloud took genuine end-to-end encryption away from Apple Notes and Reminders. That decision made a gap visible. Software as considered as Apple's own tools, built with privacy as a structural truth rather than a marketing position.

Every product here is built because it ought to exist, because there is a real person without a good answer, and because making it well is worth the time it takes.

Read the full story, and the five constraints →
The name
Con Sidus
From the Latin, to stargaze, to navigate by fixed points of light.
And
Considera
To think carefully before acting.
Said aloud
Consider us
The name carries its own invitation.

Our work

A small portfolio,
built to last.

Each product is built because it should exist, not because it scales.

Waitlist open

Catchlight

Notes, tasks and reminders in one place on iPhone. Everything is encrypted on the device with your Privacy phrase, which only you hold, there is no account to create, and it works with no signal at all. Sync is optional, and it points at a folder you choose rather than a server we run.

Free and open

Proton Bridge MCP

Lets an AI assistant search, read, file and reply to your Proton Mail. It runs on your own computer against Proton Mail Bridge, so no message leaves the machine it already sits on, and anything that sends stops and asks you first.

Privacy

Your data is yours.
Full stop.

End-to-end encryption is how every Considus product is built. Not a feature, not an upgrade tier, not a claim on a marketing page. Your content is encrypted before it leaves your device, with a key that stays on it.

We do not hold your keys.
We do not access your content.
We do not sell your data.
We do not show you advertising.
This is infrastructure, not policy.

The privacy policy says the same thing in the detail the law asks for, naming every processor and exactly what each one holds.

Read the privacy policy →
From the Journal

Writing on privacy, craft and building slowly.

Read the Journal →