These are the open-source components included in the iPhone version of the Fillpen app (identifier com.fillpen.app), published by Navritto Solutions Private Limited, and the licence each is used under. How you may use the app itself is set out in its terms of use.
1. Fonts
Fillpen sets text in the following open-source typefaces, each used under the SIL Open Font License, Version 1.1:
Liberation Sans, Serif and Mono
Copyright 2012 Red Hat, Inc. (digitized data copyright 2010 Google Corporation). Used under the SIL Open Font License, Version 1.1 — these render the text written onto a document.
Dancing Script
Copyright 2016 The Dancing Script Project Authors. Used under the SIL Open Font License, Version 1.1 — a typed-signature handwriting style.
Great Vibes
Copyright 2010 The Great Vibes Project Authors. Used under the SIL Open Font License, Version 1.1 — a typed-signature handwriting style.
Caveat
Copyright 2014 The Caveat Project Authors. Used under the SIL Open Font License, Version 1.1 — a typed-signature handwriting style.
The full SIL Open Font License, Version 1.1 is available at https://openfontlicense.org.
2. Frameworks and libraries
The iPhone version is built with the following open-source frameworks and libraries, each used under the Apache License, Version 2.0:
- Kotlin, its standard library and the Kotlin Multiplatform toolchain — © JetBrains s.r.o. and contributors
- Compose Multiplatform, including its Material 3 components and the Material icons — © JetBrains s.r.o. and The Android Open Source Project
- Lifecycle and Navigation for Compose, and the DataStore preferences store — © JetBrains s.r.o. and The Android Open Source Project
- kotlinx.coroutines — © JetBrains s.r.o. and contributors
- kotlinx.serialization — © JetBrains s.r.o. and contributors
- Skiko, the graphics engine that draws the Compose Multiplatform interface on this platform — © JetBrains s.r.o.
The full Apache License, Version 2.0 is available at https://www.apache.org/licenses/LICENSE-2.0.
3. Skia
Compose Multiplatform draws through Skia, the open-source 2D graphics library, used under the BSD 3-Clause License:
Skia
Copyright © Google Inc. Used under the BSD 3-Clause License, whose text is available at https://opensource.org/license/bsd-3-clause.
The PDF viewing, rendering and photo pickers use the operating system's own built-in frameworks, which require no attribution.
Fillpen's own code and content
Fillpen's own source code, design and brand are owned by Navritto Solutions Private Limited or used under licence, and are not covered by the licences above. Their use is governed by the Terms of Use. Beyond the components listed here, the app is built on the operating system's own built-in frameworks, which require no attribution; the only closed-source component is Google's Mobile Ads SDK, which serves the ads that keep the app free and is governed by Google's own terms, not an open-source licence.