Thunderbird AlternativesOnly apps categorised as Calendar Apps for iPhone

Thunderbird is not available for iPhone but there are a few alternatives with similar functionality. The best iPhone Calendar App alternative is Microsoft Outlook. It's not free, so if you're looking for a free alternative, you could try Spark Mail or Canary Mail. If that doesn't suit you, our users have ranked more than 50 alternatives to Thunderbird and three of them are Calendar Apps available for iPhone so hopefully you can find a suitable replacement.

filter to find the best alternatives

Thunderbird alternatives are mainly Calendar Apps, but if you're looking for Email Clients or Todo List Managers you can filter on that. Other popular filters include Linux, Open Source, EU, iPhone, Windows + Open Source, Windows and Free. You can also filter by region, for example EU-based alternatives if you prefer software developed in the European Union. These are just examples - use the filter bar below to find more specific alternatives to Thunderbird.
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Alternatives list

  1. Microsoft Outlook icon

    Microsoft Outlook

     397 likes

    Streamline emails, calendars, contacts, and task management with a smart inbox prioritizing critical messages. Includes calendar scheduling, third-party app integration like Facebook, Dropbox, and Trello, and support for Microsoft Exchange, Outlook.com, and Gmail, ensuring efficient task and email handling.

    127 Microsoft Outlook alternatives

    Cost / License

    • Paid
    • Proprietary

    Application types

    Platforms

    • Mac
    • Windows
    • Online
    • Android
    • iPhone
    • Android Tablet
    • iPad
    • Apple Watch
    • Android Wear
    Microsoft Outlook screenshot 1
     
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    6
    Microsoft Outlook vs Thunderbird Comments
    Top Positive Comment
    Eyji
    5

    As a Firefox user, I have tried to love Thunderbird but it just can't compete with Outlook, IMHO.

    Top Negative Comment
    LinuxDoge
    4

    Not open source, not privacy-focused, no Linux support

    Shoji VR
    Negative
    0

    no linux support, not portable, not free, and now its new version is electron app only

    3 of 6 comments
    • Microsoft Outlook is Paid and ProprietaryThunderbird is Free and Open Source
  2. Spark Mail icon

    Spark Mail

     138 likes

    E-mail app with all the great features: swipes (long/short), snooze, add (multiple) attachments from the cloud, support for various e-mail services and more.

    62 Spark Mail alternatives

    Cost / License

    • Freemium
    • Proprietary

    Application type

    Platforms

    • Mac
    • Windows
    • Android
    • iPhone
    • iPad
    • Apple Watch
    Spark Mail screenshot 1
     
    |
    2
    Spark Mail vs Thunderbird Comments
    folkomaton
    Positive
    0

    Free, simple, reliable, easy to manage multiple accounts, fair amount of customization, synchronisation, templates

    Review by a new / low-activity user.
    rmpbklyn
    Negative
    -3

    no sorting, dont show allmail for gmail

    • Spark Mail is Freemium and ProprietaryThunderbird is Free and Open Source
  4. Canary Mail icon

    Canary Mail

     29 likes

    Canary can write your emails, prioritize what needs attention, silence spam & much more. Say hello to your Inbox Copilot!

    63 Canary Mail alternatives

    Cost / License

    • Freemium
    • Proprietary

    Application type

    Platforms

    • Mac
    • Windows
    • Android
    • iPhone
    • Android Tablet
    • iPad
    • Apple Watch
    iOS-1
     
3 of 3 Thunderbird alternatives