A safer way than F-Droid to download apps... directly from the source with no middle-man. See: https://www.youtube.com/watch?v=JiN37bn0OE8&t

The most secure/private OS to replace Google.

Alternative, CalyxOS: CalyxOS

I add Izzy to it: IzzyOnDroid To add it to F-Droid, go to settings and add to repository: https://apt.izzysoft.de/fdroid/ Here is the Repo: https://gitlab.com/IzzyOnDroid/repo

HOWEVER, it is not the most secure way to add apps. More privacy, but not more secure. Not only are they updated less frequently, but it is not as secure as downloading from a repo like on GitHub (you can set up something like an RSS feed to get notified of new updates to download for your apps).

The best mail client for Android. Open-source.

You can encrypt mail with an add-on app, OpenKeychain: OpenKeychain

They have a new app built from K-9 on Android, and I assume it will eventually replace K-9 completely. It offers seamless porting from your accounts on desktop to Android, which is quite convenient.

Cross-platform password manager

Alternatively, Proton Pass: Proton Pass Buttercup: Buttercup Lesspass: LessPass

Open source authenticator for Android only.

Recommend 2FAS if you want on iPhone also.

Alternatively and for iPhone as well,

• 2FAS (also has browser extension: 2FA Authenticator (2FAS) (backup via encrypted folder on Google Drive (not automatic android backup) or manual encrypted file, app lock, browser extension (wouldn't recommend for security), import, blocks screenshot with timer to allow).
• FreeOTP: FreeOTP (backup via Android Google automatic backup, or download ecrypted backup file. However, password cannot be changed later, and no 2fa itself, like email or phone.) Authenticator Pro: Stratum (only Android)

Okay, but above are better,

• Bitwarden Authenticate: Bitwarden Authenticator (android automatic backups or manual unencrypted file backups. Only biometric app password. )

Not recommended, based in India, can't see client-side what is happening, requires login:

• ente Authenticator: Ente Auth

Open-source VPN client. Works with every trustworthy VPN provider. Preferable to closed-source apps.

Alternatively, and faster than OpenVPN, but not all VPN providers use it yet, WireGuard: WireGuard

Alternatively, a proxy, Shadowsocks: Shadowsocks

But consider making your own VPN with a VPS: https://gist.github.com/joepie91/5a9909939e6ce7d09e29

List of some good VPN: https://offshore.cat/vpn

DNS + Firewall. Open-source. Be aware that alternative DNS opens you up to being fingerprinted as you don't blend in as well.

Alternatively, (though none other than RethinkDNS allow simultaneous usage with a VPN protocol like Wireguard from my knowledge. they may or may not allow the use of proxies). TrackerControl: TrackerControl AdGuard: AdGuard Blokada: Blokada

Currently the most secure browser on Android (need GrapheneOS).

Good, private browser for Android

Alternatively, a Chromium-based browser, Cromite: Cromite

Cross-platform, private and open-source note-taking app that syncs across devices.

Android keyboard for secure E2EE communication through the signal protocol in any messenger. Communicate securely and independent, regardless of the legal situation or whether messengers use E2EE.

A secure and private messaging app that does not require a phone number.

For even more security (but not plug and play), Briar: Briar

One of the most secure messaging apps, even endorsed by Snowden. However, at this time you have to use a phone number.

The most convenient messaging app that lets you delete messages at any time, and supports extremely large groups.

Alternatively, a few different (sometimes less) features and faster and still official app, TelegramX: Telegram X

Alternatively for a web app (there are a few of these you can find on telegram.org), Telegram Web A: Telegram Web A

Alternatively for more features, but not official and some controversy with developers (use at own risk), NekoGram X: NekoGram X

Works well. Unlike Desktop, it remembers your place by default. Good for playing audiobooks while driving or watching videos.

Simple text editor that supports both .txt and .md, so you can use it with notebooks like Zim Wiki or Obsidian if you sync them on the cloud.

Use this for raw photos.

If you are using Graphene, you may also want Google's proprietary camera app, Google Camera: Google Camera

Open-source app that reduces image size and wipes metadata from images before sending.

Nice screenshot app you can use. You can add it to your quick settings tiles in the notification shade at the top, as an overlay, or by pressing buttons like you normally might.

Then it lets you drag a box rather than having to crop later (but can also snap the entire screen).

Quite efficient for meming.

Open-source Spotify music downloader

Alternatively, Spotube: Spotube Libretube: LibreTube

Front-end for YouTube. Allows you to easily download videos/mp3, doesn't need Google Play services, let's you listen to music in background, etc.

Alternatively and to remove ads: Tubular: Tubular

Alternatively just to download videos/music from YouTube, Seal: Seal

Turn photos of documents into small .pdf/.jpg. Good at making them look like black/white or color scans and cleaning up imperfections.

Open-source, and edits into a small file even better than CamScanner. But at least on GrapheneOS, it doesn't take the photos well, so I take photos with the normal camera first.

For a good proprietary option, but full of ads and not pro-privacy, CamScanner: CamScanner

Supports your Veracrypt containers on Android. Open-source.

Orbot is a freely licensed open-source application developed for the Android platform. It acts as a front-end to the Tor binary application, and also provides an HTTP Proxy for connecting web browsers and other HTTP client applications into the Tor SOCKS interface.

Collects and analyses mobile radio data to make you aware of your mobile network security and to warn you about threats like fake base stations (IMSI catchers), user tracking, and SS7 attacks.

Haven is for people who need a way to protect their personal spaces and possessions without compromising their own privacy. It is an Android application that leverages on-device sensors to provide monitoring and protection of physical spaces.

Anti-censorship tool to bypass deep packet inspection.

This tool helps you detect potential "man-in-the-middle" attacks by comparing the security fingerprints of your SSL certificate with the one seen from a trusted external network. If the fingerprints don't match, it suggests someone might be tampering with your internet traffic.

Allows users to monitor and control the widespread, ongoing, hidden data collection in mobile apps about user behavior ('tracking').

Alternatively, Exodus: Exodus Privacy

ReThink DNS above may have much of the same features already, but TrackerControl may have some different information present and finetuning.

ClamAV antivirus for Android. Open-source

Set this as your default browser to automatically clean links of trackers and then open them in your browser of choice.

Alternatively, Leon: Léon – The URL Cleaner

Freeze apps (even some system apps) that you do not use. Save battery, increase security. Open-source.

Scan .apk files and Android threat protection

Monitor GSM/CDMA/LTE network: current and neighboring cell infos, signal strength. Multi SIM support (when possible). Use GPS/geolocation. Generate database with custom info on cells. Export log to file CLF/KML. Map shows cell location. List WiFi access points.

🔔 Get the famous "Recording Indicators" feature of iOS14 to android. Get notified every time a third-party app or a service uses camera or microphone. - GitHub - NitishGadangi/Privacy-Indicator-App: 🔔 Get the famous "Recording...

Find out if someone is tracking you. May decrease battery. Open-source

Open-Source Cloud Storage

Alternatively, OwnCloud: ownCloud

For a good free, proprietary, but privacy-respecting option, kDrive: kDrive ProtonDrive: Proton Drive Filen: Filen

For a different sync option, Syncthing: Syncthing

Auto-shut off bluetooth when not in use for security and battery. Open-source.

Not needed with GrapheneOS now, as this option is built-in.

FUTO Voice Input is an application that lets you do speech-to-text on Android, integrating with third party keyboards or apps that use the generic speech-to-text APIs.

Small and lightweight, open-source calculator and converter.

Breezy Weather is a weather app with a strong focus on design, with a simple, clean UX, smooth animations, and Material Design all over, plus lots of customizability.

A quick, text-based launcher. You don't have to use it as a launcher. You can also set a widget.