AstraMentisCredits
Almost everything you see here we wrote ourselves, but not all of it. The poems were written by someone a hundred years ago, the recordings were played by other people, and the kanji strokes were drawn by another person with patience. This page says what belongs to whom, and under what permission it is used.
What is ours
The questions, the explanations, the ladder of each area, the programming glossaries and the translations of the quotations between cards are original to AstraMentis. The maths, astronomy and chemistry exercises are generated by the app itself.
BodyParts3D / Anatomography · Database Center for Life Science (DBCLS)
The body you turn in Biology's “where is it?” cards. The views are rendered from their anatomical meshes before building and ship with the app; the renders keep the same licence.
KanjiVG · Ulrich Apel
The kana and kanji strokes you trace with your finger in Japanese, with their order and direction. The derived files the app uses keep the same licence.
Project Gutenberg
Public domain
The stories and most of the poems come from here. Only books Gutenberg marks as free of copyright are imported; if it does not confirm that, the import stops. The texts are public domain: on import the Project Gutenberg header, footer and trademark are stripped, so the cards are not distributed as its editions. It is named here as provenance.
Public-domain quotations and proverbs
Public domain
The short lines that appear between cards. They are by authors whose copyright has expired —Machado, Cervantes, Bécquer, Dickinson, Thoreau, Seneca, Montaigne, Austen, Chesterton, Wilde, Twain, among others— or proverbs with no known author. Each card names the author and the work, and the texts can be checked on Wikisource and in the editions cited. The translations between Spanish and English are ours.
Projekt Runeberg
Public domain
The Swedish poems by Erik Axel Karlfeldt and Verner von Heidenstam, from editions of 1898 and 1899. The rest of the poetry comes from public-domain books on Project Gutenberg, one by one and with each author's year of death checked.
Wikimedia Commons
Public domain, CC0, CC BY or CC BY-SA, depending on the file
Classical music recordings. Only files with a recognised free licence are used —nothing marked non-commercial or no-derivatives— and every card links to the file's own page and, where the licence has conditions, to its legal text.
Mikael Häggström · lámina anatómica
Public domain
The abdominal plate you tap in Biology. Its author released it into the public domain, and it is the same one that illustrates Wikipedia's anatomy articles. It is cropped and stripped of its original labels, which is what the public domain allows; the rest is untouched.
Natural Earth
Public domain
The country outlines and the grid of the geography and astronomy maps, baked at 1:110m scale.
Lichess
CC0
The chess puzzles, with their Elo and their themes, which are the whole ladder of the area. The database is released into the public domain and is requested from the Lichess API with identification, as it requires.
Cormorant Garamond, Instrument Sans, Noto Serif JP e IBM Plex Mono
The app's type: the serif of the headings, the text face, the Japanese one and the code one.
Curriculum references
The ladders of some areas follow the order and scope of official curricula. They are texts free of copyright and are only consulted here: no card reproduces their wording.
Skolverket · Lgr22 y Gy25 · The Swedish compulsory-school syllabuses (Lgr22) and the upper-secondary subject plans (Gy25), read from Skolverket's open API. Official texts, free of copyright; consulted for order and scope, never reproduced.
BOE · Real Decreto 217/2022 · Spain's lower-secondary curriculum, used as a rough stage-by-stage parallel. A regulation, free of copyright.
Neither Skolverket nor the Spanish Ministry of Education endorses this app; they are named as provenance.
If you believe something here should not be, write to the contact on the privacy notice and it will be taken down while it is checked.