Spark Mail is an email application developed by Readdle, a software development company based in Ukraine. Readdle was founded in 2007 and has since developed a range of iOS productivity apps, including Scanner Pro, PDF Expert, and Calendars. Readdle’s apps are known for their user-friendly interfaces and innovative features.

Spark Mail, launched in 2015, aims to simplify and streamline email management for users. The app features smart inbox sorting, team collaboration features, customizable email signatures, and automatic email snoozing, among other features. It is available for free on iOS and macOS platforms, as well as recent additions to Android and Windows. A paid premium version offering additional features, include the latest AI features.

Readdle continues to be a leader in iOS productivity apps, with its products receiving numerous awards and recognition from tech publications and users alike. The company is committed to innovation and improving productivity for its users.

The Details

Spark Mail’s primary feature set includes several standout features that set it apart from the competition. One of the app’s most impressive features is its smart inbox sorting, which uses artificial intelligence to prioritize emails and sort them into categories such as personal, notifications, and newsletters. This helps users quickly find and manage their most important emails without being overwhelmed by irrelevant messages.

Another standout feature of Spark Mail is its customizable email signatures, which allow users to create professional-looking signatures that can include images, links, and social media icons. The app also offers automatic email snoozing, which allows users to temporarily remove emails from their inbox and have them reappear later at a specified time.

In addition, Spark Mail offers a number of other useful features such as email scheduling, quick replies, and integration with other productivity apps. Overall, Spark Mail’s feature set is designed to help users manage their email more efficiently and effectively, making it a top choice for anyone looking for an alternative to traditional email clients.

Spark Mail includes integrations with popular productivity apps such as Trello, Dropbox, Google Drive, Evernote, OneDrive, and more. It also allows users to connect with their calendar, including Google Calendar, Outlook Calendar, and Apple Calendar. Additionally, it offers integrations with popular communication tools like Slack and Microsoft Teams, as well as email tracking and analytics tools like Yesware and Mailtrack. These integrations enhance the app’s functionality and make it a comprehensive productivity tool for users.

What We Liked

  • Smart inbox sorting saves time and helps users focus on important emails.
  • Customizable email signatures maintain a professional image and save time.
  • Automatic email snoozing keeps the inbox clutter-free and ensures important emails are dealt with at the appropriate time.
  • Quick replies save time and effort for common email responses.
  • Powerful search capabilities make it easy to find specific emails quickly and efficiently.
  • Collaboration features allow teams to work together on complex projects or conversations.
  • Email templates save time for frequently sent emails.
  • App integrations with other productivity apps improve efficiency and reduce the need to switch between apps.
  • Privacy and security features protect user data and ensure confidentiality.

You Might Not Like

  • Some features require premium subscription: While the basic version of Spark Mail is free, some of the app’s most useful features (like email scheduling and AI features) require a paid premium subscription, which may be a turnoff for some users.
  • AI sorting may not be perfect: While Spark Mail’s AI-powered inbox sorting is generally accurate, it may occasionally mis-categorize emails or miss important messages, which could be frustrating for some users.
  • Privacy concerns: While Readdle states that it is committed to user privacy and security, some users may be uncomfortable with the idea of a third-party app provider having access to their email data.
  • No full-text search: While Spark Mail does have powerful search capabilities, it does not offer full-text search, which means that users may not be able to find certain emails as easily as they would with other email clients.


Two of the main competitors to Spark Mail are Gmail and Microsoft Outlook.

Gmail is a free email service provided by Google, and it is one of the most popular email clients in the world. Like Spark Mail, Gmail offers smart inbox sorting, customizable email signatures, and automatic email filtering. However, some standout features of Gmail include its powerful spam filtering, built-in Google Drive integration, and easy integration with other Google apps like Calendar and Tasks. Gmail also offers a larger amount of free storage space than Spark Mail, which can be beneficial for users who frequently receive large email attachments.

Microsoft Outlook, on the other hand, is a popular email client for both personal and business use. Like Spark Mail, Outlook offers smart inbox sorting and customizable email signatures, as well as features like email snoozing and quick replies. However, Outlook also integrates seamlessly with Microsoft’s other productivity apps, such as Office and OneDrive, making it a more comprehensive productivity solution. Outlook also offers a built-in calendar feature, which is something that Spark Mail lacks, and it has a more robust search function than Spark Mail.

Overall, while Spark Mail offers a user-friendly interface and a range of useful features, its competitors like Gmail and Microsoft Outlook offer more comprehensive productivity solutions with a wider range of features and integrations. However, Spark Mail may be a better option for users who want a simpler and more streamlined email client without the extra bells and whistles of its competitors.

Final Thoughts

In conclusion, Spark Mail by Readdle is a user-friendly email application that aims to simplify and streamline email management for users. Its standout features include smart inbox sorting, customizable email signatures, and automatic email snoozing, among others. While some of its most useful features require a paid premium subscription, the free version is still a great option for users looking for a more streamlined email client. Compared to its competitors like Gmail and Microsoft Outlook, Spark Mail may be a better choice for users who want a simpler and more streamlined solution without the extra bells and whistles. Spark Mail is available for free on iOS and macOS platforms, with a paid premium version offering additional features for USD $8 per month or $60 annually.