Alternatives to Microsoft Outlook for iOS and Android

Microsoft's Outlook mobile app for email, calendar and contacts on iPhone, iPad and Android. The listings below can replace it for an important use case. Each note says what changes if you switch.

Replacements

Listings that take over the same core job as Microsoft Outlook for iOS and Android.

  • Spark Mail

    Smart email client that auto-sorts inboxes and drafts AI-powered replies.

    FreemiumProprietaryWindowsmacOSAndroidiOS

    Spark Mail runs on Android and iOS with automatic inbox categorization and AI-drafted replies, with AI and team features on a paid plan.

  • Apple Mail

    The email app built into macOS, iOS and iPadOS for reading mail from several providers.

    FreeProprietarymacOSiOS

    Apple Mail is free and preinstalled on iPhone and iPad with iCloud Hide My Email support, but has no Android version and no calendar in the same app.

  • K-9 Mail

    Open-source Android email client built for handling large volumes of mail.

    FreeOpen sourceAndroid

    K-9 Mail is a free open-source Android client that underpins Thunderbird's mobile app, with no iOS version and a more utilitarian interface.

  • eM Client

    A polished commercial mail, calendar and contacts client for Windows and Mac, with a free tier capped at two accounts.

    FreemiumProprietaryWindowsmacOSAndroidiOS

    eM Client offers Android and iOS apps alongside desktop, with calendar, tasks and PGP and S/MIME encryption, and a free tier capped at two accounts.

  • Canary Mail

    Encrypted email client with AI features across desktop and mobile.

    PaidProprietaryWindowsmacOSAndroidiOS

    Canary Mail adds built-in encryption and AI triage on Android and iOS, but its full feature set needs a paid subscription and AI runs in the cloud.

  • Spike

    Turns email into a chat-like interface with message bubbles instead of a list.

    FreemiumProprietaryWindowsmacOSAndroidiOS

    Spike shows email as chat-style bubbles on Android and iOS, with advanced AI and team features requiring a paid plan.

  • Proton Mail

    Official Proton Mail apps for reading and sending end-to-end encrypted email on phones, desktops and the web.

    FreemiumProprietaryWindowsmacOSLinuxAndroidiOSWeb

    Proton Mail offers end-to-end encrypted mail on iOS and Android, but only works with a Proton account rather than Microsoft or other providers.

  • Nine

    An Android and iOS email app built on Exchange ActiveSync for mail, calendar, contacts and tasks.

    PaidProprietaryAndroidiOS

    Nine is a paid Android and iOS app using Exchange ActiveSync Direct Push for mail, calendar, contacts, tasks and notes, while IMAP accounts sync email only.

Also worth comparing

These listings name Microsoft Outlook for iOS and Android as their own alternative, so the relationship runs both ways.

  • Aqua Mail

    An Android email app that manages Gmail, Outlook, Exchange, iCloud and any IMAP or POP3 account.

    FreemiumProprietaryAndroid

    Microsoft Outlook for iOS and Android combines mail, calendar and contacts and fits with Microsoft 365, but is closed source and tied to Microsoft services.

  • Etar

    An open-source Material Design calendar app for Android.

    FreeOpen sourceAndroid

    Microsoft Outlook for iOS and Android combines calendar with email and contacts, but it is closed source and closely tied to Microsoft's services.

  • FairEmail

    An open-source, privacy-oriented email app for Android that works with almost any email provider.

    FreeOpen sourceAndroid

    Microsoft Outlook for iOS and Android combines mail, calendar and contacts with Microsoft 365, but is closed source and tied to Microsoft services.

Similar software

Related functionality, not a direct replacement.