The Linwood media kit
Linwood in a few pages, for writers, partners and anyone curious: the facts, the people, the money, the products and the news. Put together by ToolGPA, not by Linwood.
Media kit
Butterfly is one of several apps published under the Linwood name, a German open-source project run by one developer rather than a company. The app is free under the GNU AGPL-3.0 licence and nothing on the site is sold.
Unofficial. Put together by ToolGPA from Linwood’s own pages, news reports and our own grades, read Oct 18, 2026. Not made, paid for or approved by Linwood. toolgpa.com
Part 01 · Company
Who they are, the facts in one place, and the people who run it
In a sentence
Butterfly is one of several apps published under the Linwood name, a German open-source project run by one developer rather than a company. The app is free under the GNU AGPL-3.0 licence and nothing on the site is sold.
In a paragraph
Linwood was based in Dormagen, Germany.
Free to quote. Please link to toolgpa.com so readers can check the facts.
Jan-Andrej Diehl
Named in the imprint as responsible for the sites
Linwood Butterfly, as ToolGPA grades it: five subjects, a letter for each, and a GPA.
Open-source handwriting and sketching app with an infinite canvas
Note-Taking AppsFree plan
Best for free handwritten notes on an endless canvas. Butterfly is a free, open-source app for handwriting, sketching and marking up PDFs on a canvas that never runs out.
Linwood Butterfly’s grade as a badge for its own site, free: it updates itself and links to the review. Code at toolgpa.com/badges.
Part 03 · News
What they have announced lately, and every official channel
4
Announcements since Sep 28, 2026
Only accounts Linwood’s own site links to. No personal addresses.
This kit is ours, not yours. Here is how to make it right, and what else we have made about you.
Quoting this kit?
Name ToolGPA and link to the live page (scan the code), where every fact links to the page it was read from.
ToolGPA, "Linwood Media Kit" (unofficial), read Oct 18, 2026. https://toolgpa.com/tools/linwood-butterfly/company
Choosing software? Every tool graded, every price dated.
Compare tools at toolgpa.com ›This media kit is ToolGPA’s own summary of what Linwood’s pages, news reports, investors’ announcements and public filings said on the dates shown, with our own grades. It is not made, paid for or approved by Linwood, and Linwood’s names and logos are trademarks of their owner. Grades are our judgement under the rules at toolgpa.com/grades. ToolGPA uses affiliate links and may earn a commission from them, and it works with sponsors; no one can pay for a grade. Product pictures are Linwood’s own, from its website and app-store listings.
