Contents
1. Liturgical texts
The Hebrew liturgical texts follow Nusach Ari; the liturgy itself is in the public domain. The Hebrew text of the siddur is taken from the “Siddur Chabad” of Hebrew Wikisource (he.wikisource.org), as published by Sefaria (sefaria.org), and is used under the Creative Commons Attribution-ShareAlike licence (CC BY-SA). Madrega's arrangement of that text (division into lines and phrases) is offered under the same licence. The Hebrew text of the Book of Psalms (Tehillim) is the Westminster Leningrad Codex (tanach.us), in the public domain.
2. Translations, transliterations and explanations
Where it matches the Hebrew, the English translation of the siddur is based on The Metsudah Siddur by Avrohom Davis (1981), published by Sefaria under the Creative Commons Attribution licence (CC BY), and has been edited by Madrega. The English translation of the Book of Psalms is The Holy Scriptures according to the Masoretic Text (Jewish Publication Society, 1917), in the public domain. All other translations into English, Russian and Spanish, the transliterations and the word-by-word explanations are original works.
3. Stories and teachings
Holiday stories and mentor messages are original retellings of the Torah, the Talmud, the Midrash and the commentary of Rashi, which are in the public domain.
4. Artificial intelligence
Answers of the AI mentor and the support assistant are generated by the Claude model of Anthropic, PBC, under Anthropic's commercial terms.
5. Synthesised voices
All voices in the app are synthesised and do not belong to real persons. The voices of the mentors and of the prayer reader are generated in advance from the texts of the app with Microsoft Azure AI Speech neural voices, including voices offered in preview, and with Google Cloud Text-to-Speech voices (Chirp 3 HD), under the Microsoft Product Terms for Azure AI Speech (for preview voices also the Supplemental Terms of Use for Microsoft Azure Previews) and under the Google Cloud Platform Terms of Service with the Service Specific Terms for Cloud Text-to-Speech, respectively. No personal data of users is transmitted to these services.
6. Fonts
Onest, Unbounded, Noto Serif Hebrew and Secular One are used under the SIL Open Font License, Version 1.1.
7. Calendar and halachic times
Hebrew calendar dates are computed using Unicode CLDR data, licensed under the Unicode License v3. Candle-lighting, nightfall and other halachic times are computed using the KosherZmanim library, licensed under the GNU Lesser General Public License, version 2.1 (LGPL-2.1). The source code of KosherZmanim is available at github.com/KosherJava/zmanim. City search uses the Open-Meteo Geocoding API with GeoNames data, licensed under Creative Commons Attribution 4.0 (CC BY 4.0).
8. Illustrations and icons
Illustrations and icons are original works created for Madrega.
9. Music
The alarm sounds (Morning, East and Stillness) are original musical works composed for Madrega. They are performed with recordings of instruments from the Versilian Community Sample Library (VCSL), dedicated to the public domain under Creative Commons CC0 1.0, and arranged with Madrega's own software.
10. Brand
The name Madrega, the logo with the letter mem, the app icon and its variants, the colour schemes of the sky and the visual style of the app are the exclusive property of Madrega. They are not licensed for any use and may not be copied or imitated.
11. Copyright
The original works described in sections 2, 3, 8, 9 and 10: © 2026 Ruslan Abdrakhmanov. All rights reserved.
Last updated: 26 October 2026
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