Licenses
Last updated: June 20, 2026
KotoKey uses the following open source software and data.
Data used for English predictions
- Use: Used to create frequency data for English predictions.
- Source attribution: FrequencyWords by Hermit Dave and contributors
- License: Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
- Repository: https://github.com/hermitdave/FrequencyWords
- License URL: https://creativecommons.org/licenses/by-sa/4.0/
- Modification notice: Changes were made for use in KotoKey.
The frequency data derived from FrequencyWords and used for English predictions is made available under the terms of CC BY-SA 4.0. No additional restrictions are imposed on this derived frequency data that would prevent uses permitted by CC BY-SA 4.0. If you would like to review the derived frequency data, please contact KotoKey support.
Software used for Japanese predictions
- AzooKeyKanaKanjiConverter (version 0.11.2): Used for Japanese kana-kanji conversion. Copyright (c) 2023 Miwa / Ensan. Licensed under the MIT License. Repository · Full license text
- azooKey dictionary storage: Dictionary resources bundled with AzooKeyKanaKanjiConverter. Licensed under the Apache License 2.0. Source · Full license text
- Jinja (version 1.1.2): Used by AzooKeyKanaKanjiConverter. Copyright (c) 2024 John Mai. Licensed under the MIT License. Repository · Full license text
- swift-collections: Dependency used by AzooKeyKanaKanjiConverter. Copyright (c) Apple Inc. and the Swift project authors. Licensed under the Apache License 2.0. Repository · Full license text
- swift-algorithms: Dependency used by AzooKeyKanaKanjiConverter. Copyright (c) Apple Inc. and the Swift project authors. Licensed under the Apache License 2.0. Repository · Full license text
- swift-numerics: Dependency used by AzooKeyKanaKanjiConverter. Copyright (c) Apple Inc. and the Swift project authors. Licensed under the Apache License 2.0. Repository · Full license text
- swift-tokenizers: Dependency used by AzooKeyKanaKanjiConverter. Copyright 2022 Hugging Face SAS. Licensed under the Apache License 2.0. Repository · Full license text
Other open source packages
- swift-package-manager-google-mobile-ads: Swift Package Manager package used to integrate the Google Mobile Ads SDK. Copyright 2021 Google LLC. Licensed under the Apache License 2.0. Repository · Full license text
- swift-package-manager-google-user-messaging-platform: Swift Package Manager package used to integrate the Google User Messaging Platform SDK. Copyright 2021 Google LLC. Licensed under the Apache License 2.0. Repository · Full license text
Full license texts
- MIT License — AzooKeyKanaKanjiConverter
- MIT License — Jinja
- Apache License 2.0 — applies to azooKey dictionary storage, swift-collections, swift-algorithms, swift-numerics, swift-tokenizers, swift-package-manager-google-mobile-ads, and swift-package-manager-google-user-messaging-platform.
Except where otherwise noted, all rights in the KotoKey app itself, including its design, name, images, sounds, and other content, belong to the developer or their respective rights holders.