Questions about listening, privacy, and playback.

Yes. After the initial install, YapPDF works fully offline and needs no connection at all. PDF parsing and voice synthesis both run on your device, so it keeps reading in airplane mode, on the underground, or anywhere off-grid.

Yes. YapPDF is free with no trial timer, no premium tier, and no ads. There is no subscription and nothing to unlock.

Yes. Playback continues in the background with a foreground service, so you can lock the screen, switch apps, or pocket the phone and keep listening offline. Transport controls stay available in your notification shade and on Bluetooth earbuds.

No. There is no sign-up, no email, and no login. Install the app, import a PDF, and press play.

Never. YapPDF has no document servers. Your files are read directly from device storage and are never uploaded or transmitted off the phone, even while reading offline.

You can adjust speed from 0.75x up to 2.0x. Speed changes are pitch-preserved, so voices stay natural instead of turning high and squeaky.

YapPDF ships with US and UK English voices that read full words with natural cadence. It uses the Android text-to-speech engine, so any additional voice packs installed on your device can also be used.

YapPDF runs on Android 7.0 (Nougat) and above, and is optimised for modern devices with a battery-saver friendly dark interface.