IzzyOnDroid

This email app might be for you if your current email app:

• takes long to receive or show messages
• can manage only one email address
• cannot show conversations
• cannot work offline
• looks outdated
• is not maintained
• stores your email on their servers
• is closed source, potentially violating your privacy

This app is minimalistic by design, so you can concentrate on reading and writing messages.

This app starts a foreground service with a low priority status bar notification to make sure you’ll never miss new email.

Main features

• 100 % open source
• Privacy friendly
• Multiple accounts (inboxes)
• Multiple identities (outboxes)
• Unified inbox
• Flat conversation threading
• Two way synchronization
• Offline storage and operations
• Battery friendly
• Low data usage
• Material design

Pro features

• Signatures
• Notification settings (sounds) per account/folder/sender (requires Android 8 Oreo)
• Dark/black theme
• Account/identity colors
• Multiple select
• Reply templates
• Sort on time, unread or starred
• Search on server
• Preview sender/subject/photo in new message notifications
• Encryption/decryption (OpenPGP)
• Export settings
• and more (see the app’s Github presence)

Simple

• Quick setup
• Easy navigation
• No unnecessary settings
• No bells and whistles

Secure

• Allow encrypted connections only
• Accept valid security certificates only
• Authentication required
• Safe message view (styling, scripting and unsafe HTML removed)
• Confirm opening links, images and attachments
• No special permissions required
• No advertisements
• No analytics and no tracking
• No Google backup

Efficient

• IMAP IDLE (push messages) supported
• Built with latest development tools and libraries
• Android 6 Marshmallow or later required
• FairEmail will work properly on devices without any Google service installed.

See here for a list of often asked questions.

NonFreeNet: Google Play Store access. Tracking: BugSnag (disabled by default).

Anti-Features:

• NonFreeNet: This application promotes or entirely depends a non-Free network service.
• Tracking: The application tracks and reports your activity to somewhere – usually either without your consent, or by default (i.e. you’d have to actively disable it). It’s commonly used for when developers obtain crash logs without the user’s consent, or when an app is useless without some kind of authentication.