An offline translator that actually works with no signal

Most "offline" translation apps only download text packs — the moment you try a live voice conversation, they demand a connection. Rasterdeck Translator runs the whole thing on your phone. Voice-to-voice, camera scanning, and translation across 40+ languages, with the internet switched off.

On a plane
Translate a whole conversation at 35,000 ft with the Wi-Fi off — no roaming, no paywall.
Abroad with no data
Land in a new country before your SIM works and still talk to the taxi driver or read the menu.
Underground / rural / at sea
Subways, mountains, ships, remote villages — anywhere a signal drops, it keeps working.
When you just want privacy
Offline means the words never leave your device. Nothing to intercept, nothing logged in a cloud.

Fully offline — not "partly" offline

  • 🎙️ Voice-to-voice — speak and hear the translation back, no connection required.
  • 📷 Picture translation — photograph a sign or menu and read every line in your language, offline. (more on camera / OCR)
  • 🌐 40+ languages downloaded to the device. (see the full list)
  • 🔒 No account, no cloud, no data collection. (why that matters)

Common questions

Does Rasterdeck Translator work in airplane mode?

Yes. After the one-time language download it needs no connection for voice or photo translation.

Do I need internet to use it?

Only once, to download your languages. After that everything runs on the device.

What is a good offline translator app for Android with voice?

Rasterdeck Translator does offline voice-to-voice and photo translation on the device across 40 or more languages as a one-time purchase. Google Translate also offers offline packs, but its voice conversation mode needs internet.

How many languages work offline?

42 for text, and 40 for voice and photo translation.

Is it free?

There is a free trial with unlimited text translation plus 10 spoken translations. Unlocking unlimited voice is a one-time 2.99 USD, with no subscription.

Free trial, then a one-time purchase — no subscription. Standard $2.99, OCR $9.99, Pro $19.99, or Everything $24.99.

Get it on Google PlayCompare vs Google Translate