Tinn
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Free, and staying free

Download Tinn

Tinn runs on your computer. Your projects are .tinn files you own, and you do not need an account to open or save one.

Tinn is an early version, built by one person and still in progress. Things will change, and some will be rough. Check the numbers before you order or send a budget to a client. Found something? Tell me.

Windows

Download for Windows
Version
0.7.3, 30 October 2026
File
Installer .exe, 121 MB
Needs
Windows 10 or later, 64-bit

MSI for IT departments · Release notes

Mac

Coming. No date yet.

The Mac version is being prepared. Leave your email on the home page and you will hear when it is ready.

Leave your email

What happens next

  1. Run the installer

    The first time Tinn opens, a short welcome lets you choose your language and offers Villa Solberg, a sample project, or a project of your own. You can also open a .tinn file a colleague sent you.

  2. Fill your first sheet

    Add a room, then a product with a price. The budget adds up as you go, and Tinn saves every change.

  3. Switch on what you need

    Board, Plans and the other tools are in Settings, Tools. They are off until you switch them on.

The last page of the welcome, 3 of 3: open the example project or start your own project.
The welcome offers the example or a project of your own.
The Desk beside the spec sheet, with the first tip card saying what the Desk is.
A short tip the first time you visit each place.
The start screen with New project, Open, a search across all projects, and Villa Solberg in the recent list.
The start screen keeps your recent projects at hand.

Windows will show a warning

Windows shows a blue "Windows protected your PC" screen for apps it has not seen before. Tinn is new and not yet code-signed, so you will see it. Click More info, then Run anyway.

Nothing is wrong with the download. Every build is made in public on GitHub, and code signing is on the list.

Where Tinn is right now

Tinn is early, and built by one person. The spec sheet and its budget are the core: they are the most finished part, and safe to use on real projects. Board, Plans, Versions, Permits, Tasks and Schedule are in Beta. They work and save, and they are still being finished.

If something is broken, tell me from inside the app: Help, then Send feedback, or the Beta label on any tool. It reaches me directly.

Simon Flatin