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🤖 Alternative Android Operating Systems

Android without
Google

GrapheneOS, /e/OS and LineageOS let you use Android smartphones without Google surveillance. A beginner's comparison: what can these systems do, who are they suited for, and how do you get apps without the Play Store?

Who is this article for?

You've never heard of custom ROMs or you're considering switching to an alternative Android system. This article explains the three most important options in plain language, without assuming any technical background.

Why use an alternative operating system at all?

Android is open source — in theory. Over the years, however, Google has built in more and more proprietary components. The result: standard Android constantly sends data to Google's servers. According to a Cybernews investigation, a Pixel 9 Pro XL phones home every 15 minutes.

Alternative Android systems (often called custom ROMs) remove these Google components and replace them with privacy-friendly alternatives. The phone remains Android, but runs without constant surveillance.

Realistic expectations

Alternative Android systems are not a magic solution. Installation requires technical knowledge, some apps will no longer work, and the manufacturer's warranty is voided. In return, you get maximum control over your device and your data.

The three most important systems at a glance

📱
GrapheneOS
Maximum security for Google Pixel
Google Pixel devices only
Highest security level
Sandboxed Google Play optional
User Profiles for data separation
Bootloader can be re-locked
🌍
/e/OS
Beginner-friendly with a complete package
30+ supported devices
Complete ecosystem including cloud
microG pre-installed
Ready-to-use Murena smartphones
🔧
LineageOS
The classic with the widest device support
230+ supported devices
Active community
microG variant available
Extends the life of older devices

GrapheneOS – Security at the highest level

GrapheneOS is a non-profit project that started in 2014 as CopperheadOS. The focus is on security and privacy through system hardening — the operating system is deliberately reinforced against attacks.

Google Pixel only — why?

GrapheneOS exclusively supports Google Pixel smartphones (Pixel 6 and later). There's a good reason for this: Pixel devices are the only Android phones that meet all hardware security requirements:

Special security features

GrapheneOS goes far beyond standard Android security:

Enhanced app isolation: Every app runs in a hardened sandbox. Even if an app is compromised, it cannot access other apps or system data.

Additional permissions: GrapheneOS adds new permissions that standard Android lacks. The Network Permission allows you to fully cut off any app from the internet. The Sensors Permission blocks access to the accelerometer, gyroscope, and compass — sensors that can be abused for device fingerprinting.

Secure App Spawning: Apps are launched in completely fresh processes rather than from pre-built templates. This increases security and closes known identification vulnerabilities.

Sandboxed Google Play Services

What makes GrapheneOS special: you can install Google Play Services — but differently from usual. Instead of running as a privileged system app, Play Services run as a normal user app inside a sandbox. They have no special privileges and cannot access data from other apps.

This works flawlessly for most apps: push notifications, in-app purchases, and Google Play Games all function. Many banking apps run without issues with Sandboxed Play Services — including Volksbank, PayPal, and Revolut. You don't necessarily need to install the Play Store itself; Sandboxed Play Services are often sufficient on their own.

User Profiles — the best of both worlds

GrapheneOS supports User Profiles — completely separate user environments on a single device. You can, for example, create a "banking profile" with Sandboxed Play Services while keeping your main profile entirely Google-free.

Practical example:

Profiles are completely separated from one another — apps in one profile cannot access data from other profiles. You can switch between profiles in a few taps. Calls and SMS can be forwarded to all profiles.

Advantages
  • Highest security level of all custom ROMs
  • Monthly security updates
  • Bootloader can be re-locked
  • Google Play optional and sandboxed
  • User Profiles for complete data separation
  • Many banking apps work (Volksbank, PayPal, Revolut)
  • Very active development
  • Detailed documentation
Disadvantages
  • Google Pixel devices only
  • Installation is technically demanding
  • Some banking apps do not work
  • No microG support
  • May feel too restrictive for some users
Who is GrapheneOS suited for?

GrapheneOS is ideal if you own a Google Pixel (or are willing to buy one) and want maximum security. You should be prepared to invest time in the installation process and accept that some banking apps may not work.

Official website: grapheneos.org
Features overview: grapheneos.org/features
Installation: grapheneos.org/install/web

/e/OS – The Google-replacement ecosystem

/e/OS (pronounced "e OS") is developed by the non-profit e.foundation and commercially distributed through the company Murena. The philosophy: a complete ecosystem as a Google alternative — from the operating system to cloud services to pre-installed apps.

Murena: Buy a ready-to-go smartphone instead of installing yourself

The big advantage for beginners: Murena sells smartphones with /e/OS pre-installed. You can buy a Fairphone, a Murena SHIFTphone, or other devices that come ready with /e/OS — no installation required.

Alternatively, /e/OS can be installed on over 30 different smartphone models, including Samsung Galaxy, Google Pixel, OnePlus, and Xiaomi devices.

microG instead of Google Play Services

microG is an open-source reimplementation of Google Play Services. Apps that expect Google services usually work with it — but with significantly less data collection than the real Google Services.

What works: push notifications, location services (via Mozilla Location Services), most standard apps. What can be problematic: banking apps with strict security checks, some Google-owned apps.

The Murena ecosystem

/e/OS comes with a complete Google-replacement package:

Advanced Privacy — the centrepiece

The Advanced Privacy Widget shows in real time which apps use trackers and blocks them. You can hide your IP address and feed apps a fake location. A weekly privacy report provides statistics on blocked trackers.

Privacy Score not always reliable

The App Lounge shows a "Privacy Score" for each app. This is based only on detected trackers, not on actual data collection. Facebook sometimes receives 9/10 points because it technically doesn't use classic trackers — a misleading rating. The /e/OS developers are working on improvements.

Advantages
  • Wide device support (30+ models)
  • Very beginner-friendly
  • Complete ecosystem (OS + cloud + apps)
  • App Lounge combines Play Store + F-Droid
  • Advanced Privacy is very user-friendly
  • Murena sells ready-to-use devices
  • Active community
Disadvantages
  • microG doesn't work with all apps
  • Banking apps can be problematic
  • Murena Cloud requires payment beyond 1 GB
  • Occasional performance issues
  • Privacy Score not always accurate
  • Dependency on the Murena ecosystem
Who is /e/OS suited for?

/e/OS is the best choice for beginners who want a complete out-of-the-box package. Especially recommended if you buy a Murena smartphone — then technical installation is skipped entirely.

Official website: e.foundation/e-os
Murena smartphones: murena.com/smartphones
Supported devices: doc.e.foundation/devices

LineageOS – The community classic

LineageOS is the successor to CyanogenMod, one of the most popular custom ROMs of all time. When CyanogenMod was discontinued in 2016, the developers forked the code and founded LineageOS. Today LineageOS has over 3.4 million active users.

The widest device selection

LineageOS supports over 230 different Android devices — from brand-new smartphones to older models long since abandoned by their manufacturers. Samsung, Google, OnePlus, Motorola, Xiaomi, Sony, LG, Fairphone — the list is long.

This makes LineageOS the ideal solution for reviving old smartphones or for devices supported by neither GrapheneOS nor /e/OS.

Vanilla AOSP without pre-installations

By default, LineageOS installs no Google Services and no microG. The system is "vanilla" — very close to the original Android Open Source Project. You decide yourself whether to install GApps, microG, or nothing at all.

This gives maximum control, but also means: you have to manage app sourcing yourself.

LineageOS for microG

There is an official microG variant: LineageOS for microG. This version comes with pre-installed and configured microG as well as F-Droid. The technically demanding Signature Spoofing configuration is already taken care of.

For beginners, LineageOS for microG is significantly easier than standard LineageOS.

Community-driven

LineageOS is developed by a worldwide community of volunteers. That means: active forums, plenty of guides, quick help when things go wrong — but also that some devices are better supported than others.

Advantages
  • Widest device selection of all custom ROMs
  • Very active community
  • Stable builds
  • Extends the life of older devices
  • Monthly security updates
  • Foundation for many other ROMs
  • microG variant available
Disadvantages
  • No Google Services pre-installed
  • microG installation is complex
  • Less security hardening than GrapheneOS
  • Bootloader remains unlocked
  • Banking apps can cause issues
  • No official manufacturer support
Who is LineageOS suited for?

LineageOS is ideal for tech enthusiasts with devices outside the Pixel or Murena range. Also perfect for breathing new life into old smartphones. Choose LineageOS for microG if you're a beginner.

Official website: lineageos.org
LineageOS for microG: lineage.microg.org
Supported devices: wiki.lineageos.org/devices

App stores: Where do you get apps?

Without the Google Play Store, you need alternative sources for apps. The two most important: F-Droid for open-source apps and Aurora Store for anonymous Play Store access.

F-Droid – The open-source app store

F-Droid is a catalogue of Free and Open Source Software (FOSS). Over 4,000 apps, all open-source, all tracker-free, all free of charge. No account needed, no advertising.

F-Droid transparently shows which permissions an app requires and whether trackers are included. Apps are reviewed by the community and compiled from source code — you know exactly what you're installing.

Popular apps on F-Droid:

Installation: Download the F-Droid APK from f-droid.org, allow "Install from unknown sources", then install.

Aurora Store – Anonymous Play Store access

Aurora Store is an unofficial, open-source client for the Google Play Store. It enables downloading Play Store apps without a Google account.

Aurora generates anonymous throwaway accounts and downloads apps directly from Google's servers — the same original APKs as in the Play Store. You can also use your own Google account if you want to access purchased apps.

Additional features:

Installation: Install Aurora Store via F-Droid: f-droid.org/packages/com.aurora.store

Anonymous accounts can be blocked

Google occasionally blocks the anonymous accounts generated by Aurora. Simply have Aurora generate a new account. This is normal and not a problem.

APK installation – The manual method

APK files are Android installation packages — like .exe files on Windows. Many developers offer their apps directly as APK downloads.

Trustworthy sources for APKs:

Installation: Download the APK, allow "Install from unknown sources", tap the file, install.

Be careful with APK sources

APKs can contain malware. Only download from trustworthy sources. Avoid random websites offering "premium" apps for free — these are almost always tampered APKs containing malicious code.

Banking apps and app compatibility

The honest truth: some apps don't work on custom ROMs. The biggest issue is banking apps.

The SafetyNet / Play Integrity problem

Google offers app developers APIs called SafetyNet (deprecated) and Play Integrity (current), which check whether a device has been tampered with. The checks look for:

Most custom ROMs fail these checks. Apps that use Play Integrity will then refuse to function.

Which apps are affected?

Potentially problematic apps:

Apps that normally work:

Solutions for banking apps

Option 1: GrapheneOS with Sandboxed Play Services
GrapheneOS gives the best chances of banking apps working. Many apps run flawlessly with Sandboxed Play Services — including Volksbank, PayPal, and Revolut. With a re-locked bootloader, GrapheneOS can even pass Play Integrity checks. The Play Store itself is not required for most banking apps — Sandboxed Play Services alone are sufficient.

Use User Profiles: banking apps in a separate profile, main profile stays Google-free.

Option 2: Online banking in the browser
Most banks have good web apps. This always works and is the simplest compromise.

Option 3: Second device
Keep an old smartphone with stock Android just for banking apps. Everything else runs on the custom ROM.

Option 4: Magisk modules (for technical users)
With root and Magisk modules like "Play Integrity Fix", Google's checks can sometimes be circumvented. This is a technical cat-and-mouse game and not for beginners.

Check before you switch

Before converting your main device: check in the Plexus database (plexus.techlore.tech) whether your most important apps work with microG. For GrapheneOS, an app compatibility list is available in the official forum.

Installation – an overview

Installing a custom ROM is a multi-step process. Here's the rough outline — detailed guides are available on the official websites.

General process

1. Preparation

2. Unlock the bootloader

3. Install custom recovery (usually required)

4. Flash the ROM

5. Setup

Links to official installation guides

GrapheneOS:
Web installer (recommended)
CLI installation (for advanced users)

/e/OS:
Easy Installer (for supported devices)
Manual installation (device-specific)

LineageOS:
Installation wiki
Device-specific guides

Important warnings

Warranty void: Installing a custom ROM voids the manufacturer's warranty.

Data loss: Unlocking the bootloader permanently erases ALL data.

Brick risk: Errors during installation can render the device unusable ("brick").

Time investment: First installation takes 2–4 hours (including reading the documentation).

Comparison: Which system for whom?

Criterion GrapheneOS /e/OS LineageOS
Device support Google Pixel only 30+ devices 230+ devices
Security ⭐⭐⭐⭐⭐ Highest ⭐⭐⭐⭐ High ⭐⭐⭐ Medium
Privacy ⭐⭐⭐⭐⭐ Maximum ⭐⭐⭐⭐⭐ Maximum ⭐⭐⭐⭐ High
Beginner-friendliness ⭐⭐⭐ Medium ⭐⭐⭐⭐⭐ Very high ⭐⭐⭐ Medium
App compatibility ⭐⭐⭐⭐ High (with Play) ⭐⭐⭐ Medium (microG) ⭐⭐⭐ Medium
Google Services Optional (sandboxed) microG (pre-installed) None (manual)
Banking apps Usually ✅ Partially ⚠️ Partially ⚠️
Bootloader Can be re-locked ✅ Remains open ❌ Remains open ❌
Updates Monthly Monthly Monthly
Cloud services None Murena Workspace None
Cost Free Free (cloud paid beyond 1 GB) Free
Ideal for... Security-conscious Pixel users Beginners, complete package Tech enthusiasts, older devices

Decision guide

Choose GrapheneOS if:

Choose /e/OS if:

Choose LineageOS if:

Conclusion

Alternative Android operating systems are not the right solution for everyone. They require technical knowledge, don't work with all apps, and void the warranty. In return, you get maximum control over your device and your data.

GrapheneOS offers the highest security for Google Pixel users. /e/OS is the most beginner-friendly system with a complete Google-replacement ecosystem. LineageOS supports the most devices and extends the lifespan of older smartphones.

All three systems share one thing: they end permanent Google surveillance and give you back control. Whether that trade-off is worth it is for you to decide.

First steps

Visit the official websites, read the documentation, and check whether your device is supported. Back up your data, set aside a weekend for the installation — and take the plunge.