Licences.

Quietlift is built on the work of others. Thank you to everyone below.

Fonts

Barlow and Barlow CondensedCopyright 2017 The Barlow Project Authors (github.com/jpt/barlow). Licensed under the SIL Open Font License, Version 1.1. Full licence text. Used in the app and on this website.

Exercise data

free-exercise-dbQuietlift’s exercise library was curated by hand. Its muscle and equipment data is informed by free-exercise-db (github.com/yuhonas/free-exercise-db), released into the public domain under the Unlicense.

Open-source libraries

Library	By	Licence
Kotlin standard library	JetBrains	Apache 2.0
kotlinx.coroutines, kotlinx-datetime, kotlinx.serialization	JetBrains	Apache 2.0
Compose Multiplatform (runtime, foundation, UI, Material 3, resources)	JetBrains and the Android Open Source Project	Apache 2.0
Navigation and Lifecycle for Compose Multiplatform	JetBrains and the Android Open Source Project	Apache 2.0
AndroidX: Core, Core Splashscreen, Activity, Lifecycle, WorkManager, Glance	The Android Open Source Project	Apache 2.0
Koin	The Koin project	Apache 2.0
SQLDelight	Square, Inc. (Cash App)	Apache 2.0
SQLCipher Community Edition	Zetetic LLC	BSD-style, below
SQLite (inside SQLCipher)	The SQLite developers	Public domain
FileKit	Vincent Guillebaud	MIT, below

The Apache License, Version 2.0, is at apache.org/licenses/LICENSE-2.0. For any library not listed in full here, see the library’s own licence.

Store libraries

These are not open source. They handle purchases and nothing else.

Google Play Billing LibraryGoogle. Android Software Development Kit License (developer.android.com/studio/terms). Android only.
StoreKitApple. Part of iOS. iPhone only.

SQLCipher Community Edition

Copyright (c) 2025, ZETETIC LLC
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.
    * Neither the name of the ZETETIC LLC nor the
      names of its contributors may be used to endorse or promote products
      derived from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY ZETETIC LLC ''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 ZETETIC LLC 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.

FileKit

MIT License

Copyright (c) 2026 Vincent Guillebaud

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.