Open-Source Licenses
Clarity is built on open-source software and openly licensed AI models. We’re grateful to their authors. Clarity’s live-caption engine is adapted from EchoAssist by Rachel Li, Katelyn Chen and Ethan Wen.
Components
EchoAssist
Live-caption engine Clarity is built on (speech pipeline, speaker attribution, model management).
Clarity’s caption engine is adapted from EchoAssist. Full license text below.
FluidAudio
On-device speech recognition and speaker detection runtime (Core ML).
Includes NemoTextProcessing / text-processing-rs (Apache-2.0, incorporating NVIDIA NeMo Text Processing, Apache-2.0) and fastcluster (BSD 2-Clause, text below).
Parakeet Unified 0.6B — Core ML
Speech-to-text model (English, streaming).
Licensed by NVIDIA Corporation under the NVIDIA Open Model License. Original: huggingface.co/nvidia/parakeet-unified-en-0.6b. Clarity uses the Core ML conversion unmodified (int8 streaming encoder, 70/7/1 context).
Streaming Sortformer v2.1 — Core ML
Speaker detection (diarization) model, up to 4 speakers.
Licensed by NVIDIA Corporation under the NVIDIA Open Model License. Original: huggingface.co/nvidia/diar_streaming_sortformer_4spk-v2.1. Clarity uses the Core ML conversion unmodified.
Qwen3.5-0.8B
On-device summary model.
Clarity uses the Q4_K_M GGUF quantization from huggingface.co/unsloth/Qwen3.5-0.8B-GGUF, unmodified.
llama.cpp
Runtime for the on-device summary model.
Release b11380, built as an XCFramework. Full license text below.
Atkinson Hyperlegible
Typeface used throughout the app, designed for low-vision readers.
Clarity also uses the Firebase Apple SDK (Apache License 2.0) for anonymous install statistics.
Model files and changes
Clarity downloads its AI models from Solaris Wave’s own storage so that every user receives exactly the version we tested. These are unmodified copies of the files published by FluidInference (speech models) and Unsloth (summary model). The storage folders include NOTICE and license files.
Licensed by NVIDIA Corporation under the NVIDIA Open Model License. The Parakeet Unified and Streaming Sortformer models are subject to the NVIDIA Open Model License Agreement. Their Core ML conversions by FluidInference are shared under Creative Commons Attribution 4.0.
License texts
Apache License 2.0
Applies to FluidAudio, text-processing-rs, NVIDIA NeMo Text Processing and Qwen3.5. Full text: apache.org/licenses/LICENSE-2.0.
SIL Open Font License 1.1
Applies to Atkinson Hyperlegible. Full text: openfontlicense.org.
Creative Commons Attribution 4.0 / NVIDIA Open Model License
See CC BY 4.0 legal code and the NVIDIA Open Model License Agreement.
EchoAssist — MIT License
MIT License Copyright (c) 2026 Rachel Li, Katelyn Chen, and Ethan Wen Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
llama.cpp — MIT License
MIT License Copyright (c) 2023-2026 The ggml authors Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
fastcluster (in FluidAudio) — BSD 2-Clause License
Copyright: * Until package version 1.1.23: © 2011 Daniel Müllner <https://danifold.net> * All changes from version 1.1.24 on: © Google Inc. <https://www.google.com> All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.