Does DeepL work offline? No.
Straight answer: DeepL requires an internet connection for every new translation on mobile — only previously saved favorites can be viewed offline, and both DeepL Voice and camera translation are online-only. If you need translation on a plane, abroad without data, or anywhere the signal dies, you need something that runs on the phone itself.
| Rasterdeck Translator | DeepL (mobile, 2026) | |
|---|---|---|
| Works offline | Yes — fully offline | No — internet required for all new translations (only saved favorites offline) |
| Voice conversation | On-device voice-to-voice, offline | DeepL Voice — online-only |
| Camera translation | Yes, offline | Yes, online-only |
| Text quality (online, European languages) | Good on-device models | Best-in-class — DeepL wins |
| Price | One-time from $2.99, no subscription | Free tier (caps); Pro subscription |
| Privacy | Nothing ever leaves the device | Cloud; Pro contractually excluded from training but text still leaves your device |
| Account | None | Needed for favorites / Pro |
| Languages | 40+ | About 33 |
Credit where due: for online text translation of European languages, DeepL's quality is the best in the business — if you have a connection and need nuance, it's excellent. This app is built for the other situation: no connection at all, live camera scanning, and conversations that never leave your device.
Free trial, then a one-time purchase — no subscription. Standard $2.99, OCR $9.99, Pro $19.99, or Everything $24.99.