privacyguides.org/_includes/sections/mobile-operating-systems.html

<h1 id="mobile_os" class="anchor"><a href="#mobile_os"><i class="fas fa-link anchor-icon"></i></a> Mobile Operating Systems</h1>

<div class="alert alert-warning" role="alert">
  <strong>Even though the source code of the following OS is provided, installing Google Apps may compromise your setup.</strong>
</div>

<div class="row mb-2">

  {% include card.html color="success"
  title="LineageOS"
  labels="warning:contrib:This software may depend on or recommend non-free software."
  image="/assets/img/tools/LineageOS.png"
  url="https://www.lineageos.org/"
  description="LineageOS is a free and open-source operating system for smartphones and tablets, based on the official releases of the Android Open Source Project. It is the continuation of the CyanogenMod project."
  %}

  {% include card.html color="primary"
  title="Ubuntu Touch"
  labels="warning:contrib:This software may depend on or recommend non-free software."
  image="/assets/img/tools/Ubuntu-Touch.png"
  url="https://ubuntu-touch.io/"
  description="Ubuntu Touch is a free and open-source operating system for smartphones and tablets. It's an alternative to the current popular mobile operating systems on the market. Only a few devices are <a href=https://devices.ubuntu-touch.io/>supported.</a>"
  %}

  {% include card.html color="warning"
  title="GrapheneOS"
  labels="warning:contrib:This software may depend on or recommend non-free software."
  image="/assets/img/tools/GrapheneOS.png"
  url="https://grapheneos.org/"
  description="GrapheneOS is a free and open-source security and privacy focused mobile operating system built on top of the Android Open Source Project. It currently specifically targets devices offering strong hardware security."
  %}

</div>

<h3>Worth Mentioning</h3>

<ul>
  <li><a href="https://www.replicant.us/">Replicant</a> - An open-source operating system based on Android, aiming to replace all proprietary components with free software.</li>
  <li><a href="https://www.omnirom.org/">OmniROM</a> <span class="badge badge-warning" data-toggle="tooltip" title="This software may depend on or recommend non-free software.">contrib <i class="far fa-question-circle"></i></span> - A free software operating system for smartphones and tablet computers, based on the Android mobile platform.</li>
  <li><a href="https://microg.org/">MicroG</a> <span class="badge badge-warning" data-toggle="tooltip" title="This software may depend on or recommend non-free software.">contrib <i class="far fa-question-circle"></i></span> - A project that aims to reimplement the proprietary Google Play Services in the Android operating system with a FLOSS replacement.
</ul>