Welcome to Zipic! These Terms of Use ("Terms") govern your use of the Zipic application and our website (collectively, "Zipic"). Zipic is owned and operated by 5KM Tech, LLC. By installing, accessing, or using Zipic, you agree to comply with and be bound by these Terms. If you do not agree to these Terms, you may not install or use Zipic.

Zipic is commercial software. Subject to your compliance with these Terms and your purchase of a valid license where required, 5KM Tech, LLC grants you a personal, non-exclusive, non-transferable, revocable license to install and use Zipic on devices you own or control, for your own personal or internal business purposes.

You may not:

• Reverse engineer, decompile, disassemble, or otherwise attempt to derive the source code of Zipic, except to the extent such restriction is expressly prohibited by applicable law;
• Modify, adapt, translate, or create derivative works based on Zipic;
• Rent, lease, lend, sell, redistribute, sublicense, or otherwise transfer Zipic or any portion thereof to any third party;
• Share, publish, resell, or otherwise disclose your license key, activation code, or account credentials;
• Remove or alter any copyright or other proprietary notices contained in Zipic;
• Use Zipic to develop or distribute a competing product or service.

You agree to use Zipic only for lawful purposes and in accordance with these Terms. You are responsible for the lawful and reasonable use of Zipic, and for any consequences resulting from improper use or violation of applicable laws and regulations.

Zipic, including its software code, design, user interface, graphics, icons, and documentation, is the proprietary work of 5KM Tech, LLC and is protected by applicable copyright laws. Except for the limited license expressly granted in Section 2 and the third-party open-source components listed in Section 10, no rights or licenses are granted to you under these Terms, whether by implication, estoppel, or otherwise.

The license granted in Section 2 is effective until terminated. Your rights under these Terms will terminate automatically and without notice from 5KM Tech, LLC if you fail to comply with any provision of these Terms. Upon termination, you must immediately cease all use of Zipic and destroy all copies, full or partial, in your possession or control. Sections 4, 6, 8, and 10 shall survive any termination of these Terms.

To the fullest extent permitted by applicable law, 5KM Tech, LLC shall not be liable for any direct, indirect, incidental, special, consequential, or exemplary damages, including but not limited to damages for loss of profits, goodwill, use, data, or other intangible losses, arising out of or in connection with your use of or inability to use Zipic.

5KM Tech, LLC reserves the right to modify these Terms at any time. Any changes will be effective immediately upon posting the revised Terms on our website. Your continued use of Zipic after the posting of changes constitutes your acceptance of such changes. If you do not agree with the changes, please stop using Zipic.

These Terms shall be governed by and construed in accordance with the laws of the State of Delaware, United States, without regard to its conflict of law provisions. Any dispute arising out of or relating to these Terms or your use of Zipic shall be subject to the exclusive jurisdiction of the state and federal courts located in Delaware.

If you have any questions about these Terms, please contact us at support@5km.tech

This section lists the open-source software that Zipic currently relies on, organized by integration model. We have reorganized this list to accurately reflect the codebase as of Zipic 1.9.5.

Alignment with published release notes — Our public v1.9.0 changelog described enhanced PDF compression through an optional Ghostscript integration (stronger PDF compression with font and stream optimization, plus clearer handling of encrypted PDFs; Pro). Our public v1.9.3 changelog states that PDF and GIF compression now use bundled proprietary pdfoptim and gifoptim, which replace those optional Ghostscript and gifski paths and are not open source. Our public v1.9.5 changelog states that AVIF encoding now uses the bundled proprietary avifoptim binary, which replaces the previously optional external avifenc / avifgainmaputil CLIs and is not open source. The summary below matches those version descriptions.

This software is based in part on the work of the Independent JPEG Group.

The statement above is reproduced verbatim to satisfy Clause 2 of the Independent JPEG Group (IJG) license, which covers the JPEG components in Group 0.A below.

The components in this group are not consumed as standalone Swift packages at the Zipic.app process level. Instead they are statically linked inside our proprietary helper binaries (zipic-jpeg, pdfoptim, avifoptim) and shipped as bundle resources inside the Zipic.app package. The attribution obligations of their respective licenses still apply to Zipic as the distributor of the resulting binaries.

The components in this sub-group share a common ancestry in the original Independent JPEG Group reference codec. Each of them triggers the same IJG Clause 2 attribution requirement already stated above, in addition to its own BSD-3-Clause and zlib license terms.

1. MozJPEG 3.3.1: Mozilla's improved JPEG encoder, forked by Zipic as zipic-jpeg and statically linked into the Zipic JPEG pipeline.
   License: IJG License + Modified BSD-3-Clause + zlib License.
   Copyright (C) 1991-2020, Thomas G. Lane, Guido Vollbeding. Copyright (C) 2009-2024, D. R. Commander.
2. libjpeg-turbo: Upstream of MozJPEG; also embedded transitively inside libavif (see Group 0.B).
   License: IJG License + Modified BSD-3-Clause + zlib License.
   Copyright (C) 1991-2020, Thomas G. Lane, Guido Vollbeding. Copyright (C) 2009-2024, D. R. Commander. Copyright (C) 2015, Viktor Szathmáry.
3. jpeg-encoder (Rust crate): JPEG encoder used by Zipic's proprietary PDF engine pdfoptim for embedded image re-encoding.
   License: MIT OR Apache-2.0. The bundled FDCT (Forward DCT) routines are ported from IJG code and remain subject to the IJG Clause 2 attribution above.
   Copyright (C) 2021, Volker Ströbel. FDCT portions Copyright (C) 1991-1996, Thomas G. Lane; Copyright (C) 2015, 2020, D. R. Commander.

The components in this sub-group are statically linked inside our proprietary avifoptim binary, which is the sole AVIF encoder/decoder used by Zipic 1.9.5+ and supersedes the previously optional external avifenc / avifgainmaputil CLIs. Each component retains its own BSD-2-Clause or BSD-3-Clause license; the copyright notices below are reproduced to satisfy those licenses.

1. libavif (Joe Drago / AOMedia): AVIF container/codec library that forms the encoder kernel of avifoptim.
   License: BSD-2-Clause.
   Copyright 2019 Joe Drago. All rights reserved.
2. libaom: AV1 reference encoder/decoder used by libavif.
   License: BSD-2-Clause.
   Copyright (c) 2016, Alliance for Open Media. All rights reserved.
3. libyuv: YUV scaling and conversion routines used by libavif.
   License: BSD-3-Clause.
   Copyright 2011 The LibYuv Project Authors. All rights reserved.
4. libsharpyuv: Sharp YUV conversion library used by libavif.
   License: BSD-3-Clause.
   Copyright (c) 2010, Google Inc. All rights reserved.

1. PNGOptimKit / pngoptim-swift: Native PNG quantization and APNG optimization engine. Replaces the previous external pngquant dependency since Zipic 1.9.0.
   MIT License
2. SVGift 0.3.0: Native SVG optimization engine.
   MIT License
3. FSWatcher: File system monitoring helper.
   MIT License
4. NotchNotification: MacBook notch notification component.
   MIT License
5. GeneralNotification: General-purpose notification component.
   MIT License

Note: Zipic also bundles in-house, closed-source compression helper binaries—our JPEG engine zipic-jpeg, our PDF engine pdfoptim, our GIF engine gifoptim, and our AVIF engine avifoptim. These are proprietary first-party code, are not open source, and are not third-party dependencies, so they are not listed in this open-source inventory. They are shipped as bundle resources inside the Zipic.app package and invoked via Process (NSTask).

Each of these engines, however, statically links one or more permissively licensed third-party libraries, and the attribution obligations of those libraries are reflected in Group 0 above:

• zipic-jpeg is a customised build of MozJPEG 3.3.1 — the JPEG encoder kernel is MozJPEG and is fully covered by Group 0.A. We do not claim independent authorship of the JPEG encoding algorithm.
• pdfoptim statically links the jpeg-encoder Rust crate listed in Group 0.A for embedded JPEG re-encoding, and therefore carries the IJG attribution obligation.
• avifoptim statically links libavif together with its sub-components libaom, libyuv, and libsharpyuv, all covered by Group 0.B.
• gifoptim does not depend on third-party open-source GIF code.

The proprietary engines superseded the optional Ghostscript, gifski, and avifenc paths used by earlier Zipic versions; comparing output with other tools or builds may show differences in size, quality, or speed—that is expected.

1. Sparkle 2.9.0: Software update framework.
   MIT License
2. SettingsAccess 2.1.0: macOS Settings scene access helper.
   MIT License
3. AnyCodable 0.6.7: Type-erased Codable wrapper.
   MIT License
4. keychain-swift 21.0.0: Keychain access helper.
   MIT License
5. lemonsqueezy-swift: Payment processing SDK.
   License: Not formally declared in the upstream repository at this time. Used in good faith as a permissively-licensed convenience SDK; if upstream clarifies license terms differently, we will update this entry accordingly.
6. Lottie 4.6.0: Animation rendering engine by Airbnb.
   Apache 2.0 License
7. swift-argument-parser 1.7.0: Command-line argument parser by Apple.
   Apache 2.0 License
8. webp.swift 1.1.2 / libwebp-ios 1.1.1: WebP codec wrappers around libwebp.
   BSD-3-Clause. Wraps libwebp and libsharpyuv (Copyright (c) 2010, Google Inc.).
9. jxl-coder-swift 1.9.1: JPEG XL codec wrapper.
   BSD-3-Clause. Wraps the following sub-components, each BSD-3-Clause:
   • libjxl — Copyright (c) the JPEG XL Project Authors.
   • libjpegli — Copyright (c) the JPEG XL Project Authors.
   • libbrotli — Copyright (c) the Brotli Authors.

Note: libavif (and its sub-components libaom / libyuv / libsharpyuv) is no longer consumed as a direct Swift package at the Zipic.app level. It is statically linked inside our proprietary avifoptim binary and is listed in Group 0.B above.

These software are provided "as is", without warranty of any kind. By using this product, you accept the relevant license terms of these software.

No-endorsement clause — Several BSD-3-Clause licensed components above (libyuv, libsharpyuv, libjxl, libjpegli) carry a clause stating that the names of their copyright holders or contributors may not be used to endorse or promote products derived from those libraries without specific prior written permission. Nothing in this Section 10 should be construed as endorsement of Zipic by any of the named projects or their authors. All trademarks are the property of their respective owners.

Zipic respects the open-source community. JPEG, PDF, GIF, and AVIF compression are served by our proprietary zipic-jpeg, pdfoptim, gifoptim, and avifoptim engines (not open source), each of which statically links the third-party codec libraries listed in Group 0. Other image workflows combine the permissively licensed Swift packages in Group 2 with additional proprietary components where noted.

We gratefully acknowledge:

• the Independent JPEG Group (Thomas G. Lane, Guido Vollbeding) for the foundational JPEG codec work that underlies MozJPEG, libjpeg-turbo, and the jpeg-encoder Rust crate;
• the Mozilla Foundation and the libjpeg-turbo Project (D. R. Commander) for MozJPEG and libjpeg-turbo;
• Joe Drago and the Alliance for Open Media for libavif and libaom;
• the LibYuv Project Authors and Google Inc. for libyuv, libsharpyuv, and libwebp;
• the JPEG XL Project Authors for libjxl, libjpegli, and brotli;
• Volker Ströbel for the jpeg-encoder Rust crate;
• and the Ghostscript and gifski projects for their open-source work that supported earlier optional PDF/GIF integration paths.

If anything looks misclassified or missing, contact support@5km.tech.