Unknown app
Listen to any PDF or paper
About
Transform documents into audiobooks with a lifelike voice. Read along as text highlights in sync with narration. Sync your library across devices and even use your own voice for narration.
What's New in Unknown app
1.4.2
November 7, 2026
The text view now shows just a page's figures, charts and tables instead of the whole page under the text. New documents read better: equations are spoken as math, all-caps words are read as words, and fewer words are misread. Smoother launch, and a "Ready to play" alert for documents narrated in a cloned voice. Bug fixes and improvements.
MoreSubscriptions & In-App Purchases
Unknown Pro Monthly
All voices and documents, billed monthly
Developer apps
FAQ
How does Unknown's learning methodology work?
Unknown focuses on auditory learning by converting text into spoken word. This allows users to consume information passively, similar to listening to a podcast or audiobook, while also providing visual cues through synchronized highlighting on the original page.
Can I track my progress with Unknown?
Yes, progress, bookmarks, and notes sync across your iPhone, iPad, and Mac. This allows you to pick up where you left off on any device and maintain a consistent learning experience.
Does Unknown offer any certifications?
The provided information does not mention any certifications offered by Unknown. Its primary function is to facilitate learning through audio narration of documents.
What are the subscription tiers for Unknown Pro?
Unknown Pro offers weekly, monthly, and yearly subscription plans. The monthly and yearly plans include a 7-day free trial for new subscribers.
How do I cancel my Unknown Pro subscription?
Subscriptions can be managed or canceled in your App Store account settings. You must cancel at least 24 hours before the end of the current subscription period to avoid automatic renewal.
What is the difference between Unknown and its Mac app?
The Unknown app for Mac allows for private narration of documents directly on your device with no limits. Documents narrated on the Mac automatically sync to your iPhone and iPad.
How does Unknown handle user privacy?
Documents narrated on the Mac sync via iCloud and are not seen by servers. Cloud-converted documents are encrypted, deleted after 7 days, and not used for AI training. Voice recordings are deleted once narration is complete.
What devices is Unknown available on?
Unknown is available on iPhone and iPad. The app also has a companion application for Mac.
