Turn lectures, meetings, interviews, and Voice Memos into text on your iPhone or iPad with Documents.

Keep your iPhone organized by creating folders for documents, photos, videos, and downloads. Learn how to create, manage, and organize folders with Documents by Readdle or the built-in Files app.

This guide answers all your questions: what the MKV file format is, what it can hold, how to open and convert MKV files, and when to use it.

Here's what makes Documents by Readdle the best video player app for iPhone and iPad. Hint: it's not just its ability to play numerous file formats.

Learn how to remove unwanted people, objects, text, and other distractions from your photos on iPhone. See how Documents' AI Smart Eraser compares to Google and Apple, and edit your photos in just a few taps.

Need to extract audio from a video on your iPhone? Learn how to convert videos to MP3 in a few taps with Documents by Readdle and save lectures, interviews, presentations, and more for offline listening.

Want to read EPUB or PDF books on your iPhone? Learn how to open, organize, and enjoy your ebooks in one place with Documents by Readdle.

Transfer songs, albums, and music folders from your Mac or PC to your iPhone over Wi-Fi, then organize and play them in Documents.

Learn the difference between video file formats (MP4, MKV, AVI, MOV, WebM) and codecs (H.264, H.265, AV1). Find out which format is best for social media, professional editing, and universal compatibility in 2026.