Licences

Last updated: 15 October 2026

4D Ages is built with open-source software and open data. We're grateful to everyone who makes them. Here they are, with their licences.

Software

React, React Native, React Native Web (Meta and contributors), MIT licence.
Expo and its libraries (650 Industries and contributors), MIT licence.
React Navigation, React Native Screens, Reanimated, Safe Area Context, Pager View, Tab View, WebView, Slider, DateTimePicker, Async Storage (Software Mansion, the React Native community and contributors), MIT licence.
Google Sign-In for React Native (Vojtech Novak and contributors), MIT licence.
Supabase JavaScript client (Supabase), MIT licence.
Zustand (Poimandres), MIT licence. fflate (Arjun Barrett), MIT licence.
MapLibre GL JS (MapLibre contributors), BSD 3-Clause licence.
Material Design Icons (Pictogrammers), Apache License 2.0.

The MIT licence: Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files, to deal in the Software without restriction… The software is provided "as is", without warranty of any kind. The full texts of these licences are at opensource.org/licenses/MIT, opensource.org/licenses/BSD-3-Clause and apache.org/licenses/LICENSE-2.0.

Fonts

Fraunces (Undercase Type), SIL Open Font License 1.1.
Heebo (Oded Ezer, The Heebo Project Authors), SIL Open Font License 1.1, for Hebrew on the website (licence).

Maps and places

Place search by Nominatim, using OpenStreetMap data.
The world map in books and videos is drawn from Natural Earth, in the public domain.

Music and pictures

The music in videos is from the FreePD collection (archive.org/details/freepd): "Shining Stars", "Ukulele Song", "Magic in the Garden" and "Celebration", all in the public domain (CC0).
The fruit and vegetable photos for the weeks of pregnancy are in the public domain or CC0, from Wikimedia Commons and other public collections.
The food photos in Foods & allergens are from Wikimedia Commons. These are in the public domain or CC0: Asparagus, Beans, Bread, Broccoli, Cashew, Celery, Couscous, Cream cheese, Honey, Kale, Lupin flour, Mustard, Oats (porridge), Olive oil, Potato, Rice, Salmon, Tuna. The rest are shared under Creative Commons licences and credited here (each one cropped to a square):
- Almond: photo by Ivar Leidus, CC BY-SA 4.0, cropped.
- Apricot: photo by Benjamint444, CC BY-SA 3.0, cropped.
- Barley: photo by Glane23, CC BY-SA 3.0, cropped.
- Beef: photo by Michael C. Berch, aka MCB at en.wikipedia, CC BY-SA 2.5, cropped.
- Beetroot: photo by BriannaWalther, CC BY-SA 3.0, cropped.
- Brussels sprouts: photo by Eric Hunt, CC BY 2.5, cropped.
- Butter: photo by Jacek Halicki, CC BY-SA 4.0, cropped.
- Cheese: photo by J.P.Lon, CC BY-SA 3.0, cropped.
- Chicken: photo by Evan Swigart from Chicago, USA, CC BY 2.0, cropped.
- Chickpeas: photo by AlixSaz, CC BY-SA 4.0, cropped.
- Cinnamon: photo by Simon A. Eugster, CC BY-SA 3.0, cropped.
- Cottage cheese: photo by FASTILY (TALK), CC BY-SA 3.0, cropped.
- Courgette: photo by Willis Lam, CC BY-SA 2.0, cropped.
- Cows' milk in food: photo by Janine Chedid, CC BY-SA 3.0, cropped.
- Crab: photo by Hans Hillewaert, CC BY-SA 4.0, cropped.
- Cumin: photo by OttawaAC, CC BY-SA 3.0, cropped.
- Dried apricots: photo by Andrey Butko, CC BY-SA 3.0, cropped.
- Edamame: photo by Tammy Green (aka Zesmerelda) from Chicago Upscale Dining + Lounge Republic Pan-Asian Restaurant [1] in Ontario & Rus, CC BY-SA 2.0, cropped.
- Egg: photo by Ramesh NG, CC BY-SA 2.0, cropped.
- Fromage frais: photo by Kaouther Bedoui, CC BY-SA 4.0, cropped.
- Garlic: photo by Ivar Leidus, CC BY-SA 4.0, cropped.
- Ginger: photo by HaJunkiyada, CC BY-SA 4.0, cropped.
- Grapes: photo by Vyacheslav Argenberg, CC BY 4.0, cropped.
- Green beans: photo by Undeka 11, CC BY-SA 4.0, cropped.
- Hazelnut: photo by Ivar Leidus, CC BY-SA 4.0, cropped.
- Herbs (basil, parsley): photo by Photo by David J. Stang, CC BY-SA 4.0, cropped.
- Kiwi: photo by André Karwath aka Aka, CC BY-SA 2.5, cropped.
- Lamb: photo by I would appreciate being notified if you use my work outside Wikimedia. Do not copy this image illegally by ignoring the, CC BY-SA 3.0, cropped.
- Millet: photo by Thamizhpparithi Maari, CC BY-SA 3.0, cropped.
- Mozzarella: photo by Photograph by Greg O'Beirne, CC BY-SA 3.0, cropped.
- Mushroom: photo by chris_73, CC BY-SA 3.0, cropped.
- Mussels: photo by Rainer Zenz, CC BY-SA 3.0, cropped.
- Onion: photo by Colin, CC BY-SA 3.0, cropped.
- Orange: photo by Ivar Leidus, CC BY-SA 4.0, cropped.
- Parsnip: photo by Takeaway, CC BY-SA 3.0, cropped.
- Pasta: photo by David Adam Kess, CC BY-SA 4.0, cropped.
- Peanut: photo by Ivar Leidus, CC BY-SA 4.0, cropped.
- Peas: photo by David Adam Kess, CC BY-SA 4.0, cropped.
- Pistachio: photo by THOR, CC BY 2.0, cropped.
- Plum: photo by Ivar Leidus, CC BY-SA 4.0, cropped.
- Polenta (corn): photo by it:User:Dorothy61n1, CC BY-SA 3.0, cropped.
- Pork: photo by Rainer Zenz, CC BY-SA 3.0, cropped.
- Prawns: photo by Kolforn (Kolforn) I'd appreciate if you could mail me ([email protected]) if you want to use this picture out of the Wik, CC BY-SA 4.0, cropped.
- Prunes: photo by Emőke Dénes, CC BY-SA 4.0, cropped.
- Quinoa: photo by Pom², CC BY-SA 3.0, cropped.
- Raisins: photo by Jacek Halicki, CC BY-SA 4.0, cropped.
- Rye: photo by FranHogan, CC BY-SA 4.0, cropped.
- Sardines or mackerel: photo by Friedrich Haag, CC BY-SA 4.0, cropped.
- Sesame (tahini): photo by Gilabrand, CC BY-SA 3.0, cropped.
- Soya yoghurt: photo by Veganbaking.net from USA, CC BY-SA 2.0, cropped.
- Spinach: photo by Nillerdk, CC BY 3.0, cropped.
- Squid: photo by Flickr.com user "deramaenrama", CC BY 2.0, cropped.
- Swede: photo by Mike Mozart, CC BY 2.0, cropped.
- Sweet potato: photo by Llez, CC BY-SA 3.0, cropped.
- Tofu: photo by DryPot, CC BY-SA 3.0, cropped.
- Tomato: photo by Softeis, CC BY-SA 3.0, cropped.
- Turkey: photo by Patrick Fitzgerald from Atlanta, GA, USA, CC BY 2.0, cropped.
- Walnut: photo by Ivar Leidus, CC BY-SA 4.0, cropped.
- Wheat (toast, pasta): photo by kallerna, CC BY-SA 4.0, cropped.
- White fish (cod, haddock): photo by https://sousvideguy.com/, CC BY 2.0, cropped.
- Yoghurt: photo by No machine-readable author provided. Rainer Zenz assumed (based on copyright claims)., CC BY-SA 3.0, cropped.