Readdle

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Readdle Inc.
IndustrySoftware development
Founded2007[1][2]
HeadquartersOdesa, Ukraine (HQ)
795 Folsom Street 1st floor, San Francisco, California (Remote)
[3]
Area served
Worldwide
Key people
Igor Zhadanov (CEO)
Denys Zhadanov (VP)
Alex Tyagulsky (CPO)
ProductsScanner Pro, PDF Expert, Fluix, Spark, Documents, PDF Office, Printer Pro, PDF Converter
Number of employees
310 [4]
Websitereaddle.com

Readdle is a Ukrainian software development company. It produces a range of productivity software, including calendar, email, and document management applications, primarily built for the Apple ecosystem available through the App Store.[5] As of 2024, the company's software has garnered more than 200 million downloads worldwide.[6]

History

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Readdle was founded in 2007, in Odesa, Ukraine, by former college roommates Igor Zhadanov, Alex Tyagulsky, Andrian Budantsov, and Dmitry Protserov.[7] The company is considered a global pioneer in iOS software development, having produced its inaugural web-based application to address file management on the iPhone prior to the launch of Apple's App Store.[8]

In July 2014, the company opened its first physical office outside of Odessa in San Francisco, California, a major American technology hub.[8]

Following the 2014 Russian invasion of Ukraine, Readdle took steps to protect the viability of its operations, such as moving its data online, which has allowed the company to continue to operate throughout the conflict.[8] Despite regular attacks on Odesa by Russian forces, Readdle's maintains its to headquarter in its founding-city.[9]

Products

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Documents

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Documents
DeveloperReaddle Technologies Limited
Initial release2008[10]
Repository
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Engine
    Lua error in Module:EditAtWikidata at line 29: attempt to index field 'wikibase' (a nil value).
    Operating systemiOS, iPadOS, macOS
    Websitehttps://readdle.com/documents

    Documents (previously ReaddleDocs) is a file management application.[11] The app was Readdle's first product, and was developed because co-founders Alex Tyagulsky and Andrian Budantsov wished to be able to read books on their iPhones.[7] It was initially released as a Safari-based web service in 2007.[12] Later, Apple asked Readdle to submit the app (then called ReaddleDocs) to become one of the 500 apps available on the App Store when it launched on July 10, 2008.[13] After Wall Street Journal writer Walt Mossberg endorsed the app, sales increased ninefold, netting the company $500–1000 a week.[7] In 2013, the app rebranded as Documents.[14]

    PDF Expert

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    PDF Expert
    DeveloperReaddle
    Repository
    • {{URL|example.com|optional display text}}Lua error in Module:EditAtWikidata at line 29: attempt to index field 'wikibase' (a nil value).
    Engine
      Lua error in Module:EditAtWikidata at line 29: attempt to index field 'wikibase' (a nil value).
      Operating systemmacOS, iOS
      TypePDF editor
      Websitepdfexpert.com

      PDF Expert is a PDF editing app for iPhone, iPad and Mac.[15][16] The app allows a user to read, annotate and edit PDFs, change text and images, fill in forms and sign contracts.[17]

      PDF Expert was initially launched for iOS in 2010 for the first iPad and is now supported on the iPad, iPhone, and Mac.[18]

      Spark

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      Spark
      DeveloperReaddle
      Initial releaseMay 29, 2015; 10 years ago (2015-05-29)
      Stable release
      Android3.7.1 / December 21, 2023; 2 years ago (2023-12-21)[19]
      iOS3.15.1 / November 4, 2025; 5 months ago (2025-11-04)
      macOS App Store (macOS)2.11.54 / April 2, 2025; 12 months ago (2025-04-02)
      Repository
      • {{URL|example.com|optional display text}}Lua error in Module:EditAtWikidata at line 29: attempt to index field 'wikibase' (a nil value).
      Engine
        Lua error in Module:EditAtWikidata at line 29: attempt to index field 'wikibase' (a nil value).
        Operating systemWindows, Android, macOS, iOS, watchOS
        PlatformAndroid Nougat and later, MacOS High Sierra and later, iOS 13.4 and later
        Size67.06 MB (Android), 175 MB (iOS), 58.6 MB (macOS)
        TypeEmail client
        LicenseFreeware
        Websitesparkmailapp.com

        Spark is an email application for Windows, iOS, macOS, and Android devices.[20][21][22][23][24] Lifehacker wrote that Spark was the best alternative for Mailbox users when that service went offline.[25] It was released on April 2, 2019, and was Readdle's first app released on Android.[26]

        Spark +AI

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        In 2023, Spark introduced artificial intelligence features for premium users. Dubbed 'Spark +AI', the service first launched by utilising Microsoft Azure OpenAI software to draft, rewrite, and contour emails on behalf of users.[27] In 2024, Spark +AI continued to enhance its service by rolling out a new feature which supports AI content generation in the style of the end-user, allowing for more human-like/natural email construction.[28]

        References

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        19. ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
        20. ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
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        22. ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
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        24. ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
        25. ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
        26. ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
        27. ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
        28. ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
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