Readdle is a Ukrainian mobile application development company. The company research and development is based in
Odesa, Ukraine. The operation is mostly built around the
App Store,[5] cumulatively generating over 100 million downloads.[6] The company was founded by former college roommates Igor Zhadanov, Alex Tyagulsky, Andrian Budantsov, and Dmitry Protserov.[7]
Documents (previously ReaddleDocs) is a file management application.[9] 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.[10] 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.[11] 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.[12]
PDF Expert is a
PDF editing
app for
iPhone,
iPad and
Mac.[13][14]
The app allows a user to read, annotate and edit
PDFs, change text and images, fill in forms and sign contracts.[15]
PDF Expert was initially launched for
iOS in 2010 for the first iPad and is now supported on the
iPad,
iPhone, and
Mac.[16]
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]