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Terms of use

The materials and the sample blurbs are yours to use. This page sets out the full conditions, and the one exception.

Using the materials

The screenshots, QR code, logo, and sample blurbs published on futatoki.app (collectively, the "Materials") are free to use. No advance permission is required, no credit needs to be given, and listing the URL is optional.

Edit, crop, swap, rewrite, redistribute. Adapt the blurbs to fit your school, classroom, daycare, therapy practice, family, or co-op. Print images onto handouts and pass them around. Publish them on your school's, daycare's, tutoring center's, or homeschool co-op's website. All fine.

Commercial use is also fine. Inclusion in print textbooks, paid curricula, commercial educational publications, paid newsletters, and similar contexts — whether as a citation, an illustration, or a quoted screenshot — is permitted without advance authorization, without credit, and at no cost.

Modified versions of the Materials made for your own school, program, family, or co-op may be distributed and redistributed. The app's source code is published on GitHub under the MIT License, so you can also fork the app itself and translate, modify, or redistribute it for your own community or language.

If you do want a credit line, the suggested form is published on the Materials page: "Futatoki the Learning Clock App (free, no sign-up) — futatoki.app".

One exception — physical products: incorporating the Futatoki Trade Dress into a physical product, as either the principal visual identity ("the face") or one element of a composite product ("one of the faces"), requires a separate conversation.

This section applies when an element of the visual design or brand identity of Futatoki the Learning Clock App (collectively, the "Futatoki Trade Dress") is incorporated into a mass-produced or commercially distributed physical product, including without limitation printed educational materials, books, picture books, toys, clock and watch products, hardware, and packaging. The authoritative definition of the Futatoki Trade Dress is set out in the NOTICE file of the app repository; the enumeration below is a non-exhaustive summary for the convenience of readers of this page.

The Futatoki Trade Dress comprises, without limitation: (a) the brand names "Futatoki," "Futatoki the Learning Clock App," "Futatoki the Learning Clock," "Futatoki the Clock," "知育時計ふたときアプリ," "ふたとき時計," "フタトキ時計," "扶嗒托基," "扶嗒托基 教学时钟 应用," "扶嗒托基 教學時鐘 App," and any other localized brand name used by the project, in any script or transliteration; (b) all logos, icons, and brand assets in any file format (PNG, SVG, WebP, ICO, or otherwise); (c) the 24-hour notation in which the AM face retains 1–12 and the PM face retains 12 at the top while replacing 1–11 with 13–23, together with its visual expression; (d) the "stack" (かさねる) overlap behavior of the AM and PM faces, together with its visual expression; (e) the staged dial composition referred to in the NOTICE as "Badge × Simple / Slices × Detailed / Slices × Simple" (and elsewhere in this site as "circles × simple / slices × detailed / slices × simple"), together with the visual expression of its stage transitions; (f) the color-placement principle applied in the crisp colors (くっきりいろ), sky sun grass (あおきみどり), 3 primaries (さんげんしょく), and universal (みんなのいろ) palettes, in which adjacent time regions are deliberately given hues that sit far apart on the color wheel — with no smooth gradient between neighboring segments — so that the color boundaries themselves function as visual guide lines for early learners, together with its visual expression; (g) the named palette set and the specific Japanese and English names of each palette ("crisp colors / くっきりいろ," "sky sun grass / あおきみどり," "3 primaries / さんげんしょく," "color wheel / いろのわ," "universal / みんなのいろ," "sky colors / そらのいろ," "monotone / ものとーん"); and (h) any other element constituting the visual identity of Futatoki the Learning Clock App as enumerated in the NOTICE.

The form of incorporation does not affect the scope of this section. Whether the Futatoki Trade Dress is used as the principal visual identity of an entire physical product (for example, the dial of a clock product, the central visual of a toy or picture book, or the cover or packaging of printed educational materials), as one element of a composite physical product (for example, the clock chapter inside a math workbook, a single page within a picture book, or one topic within a teaching kit), or in a form that omits attribution and presents the Trade Dress as the implementer's own original design, this section applies in each case.

Reproduction, modification, preparation of derivative works, design and behavioral reuse, translation, and paid distribution of Futatoki the Learning Clock App within the software domain — including web applications, tablet-based learning materials, mobile applications, and digital books — are permitted under the MIT License governing the source code. This permission extends to embedding the Futatoki clock face and its behavior as one piece of content within a larger tablet-based curriculum or application.

Where the visual or behavioral characteristics of the Futatoki Trade Dress reach a physical product indirectly through an electronic reproduction, modification, derivative work, or design reuse created under the MIT permission above (collectively, a "Derivative Digital Work"), this section nonetheless applies in full. It applies regardless of whether the Derivative Digital Work and the physical reproduction are produced by the same party, and regardless of whether the path from this project to the physical reproduction is direct or runs through one or more intermediate Derivative Digital Works, and regardless of any rebranding applied along the way.

Quotation and illustrative use of the Materials — including print, digital, commercial, and non-commercial uses such as classroom newsletters, counselor's-corner notes, PTO bulletins, SPED and OT corners, lesson slides, take-home packets, articles, social-media posts, blog posts, and screenshots cited in commercial educational publications — does not constitute incorporation into a physical product within the meaning of this section. Such use is governed by the broader Materials terms set out above and requires no separate authorization.

Copyright in Futatoki the Learning Clock App and in the Materials remains with the author. Nothing on this page constitutes a transfer, assignment, or waiver of those rights, or of any rights reserved under the NOTICE file of the app repository.

Conversations and questions

For physical-product or trade-dress conversations, for licensing questions, or to reach out about anything else, please open an issue on the project's GitHub repository — or use the contact email listed on the author's GitHub profile.

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