Cove Travel

Cove はお手元のスマートフォンで動作する Google Gemma モデルを同梱しています。アプリを初めて開いた時にモデルが 1 度ダウンロードされ、その後はすべての翻訳 — 画像、音声、テキスト — が端末内で実行されます。

Cove Travel uses Google's Gemma 4 E2B model — an open-weight multimodal large language model that handles text, images, and audio. The same model powers all four Cove apps (Travel, Voice, Photo, Health) and is shared across them via a single on-device directory, so installing more Cove apps does not duplicate the download. We do not use Google Translate's NMT engine, OpenAI APIs, or any cloud translator. The model file is approximately 2.5 GB and you can verify its SHA-256 from the download page before installing.

Cove Travel has a free tier with 5 AI runs per day — enough to read a menu, scan a sign, and have a short conversation every day without paying. If you need more, Cove Travel Pro is a one-time purchase of $3.99 (no subscription, no monthly fee, no recurring charge). Pro removes the daily cap. There is no trial countdown, no ads, no upsell screens during translation, and no account signup required at any point. If you uninstall and reinstall, the Pro entitlement restores via Google Play's standard restore-purchases flow.

Cove Travel は主要な旅行言語（英語、スペイン語、フランス語、ドイツ語、イタリア語、日本語、韓国語、中国語、ポルトガル語、ロシア語、アラビア語、トルコ語、タイ語）に対応しています。モデル更新ごとに追加されます。

Yes — fully. Point your phone camera at a menu, sign, handwritten note, or product label, and Cove reads the text and translates it without any network call. Optical character recognition (OCR) and translation both happen on-device using the same Gemma 4 E2B model. There is no server-side OCR fallback. This is the main difference from Google Translate's offline mode, which downloads a smaller text-only language pack but still routes camera and live-AR features through the cloud. Cove's camera translation works identically with airplane mode on or off.

Yes — voice translation is fully offline. Tap the microphone, speak in your language, and Cove transcribes, translates, and (optionally) reads the result aloud in the target language, all on your device. Two-way conversation mode lets you and another person speak alternately and have Cove bounce between languages without any uploads. There is no per-minute cost, no streaming to a server, and no account. Background noise tolerance is good for café and street settings; very loud crowds can degrade accuracy, which is a real limit of running a model locally rather than a marketing footnote.

いいえ。サーバーコンポーネントは存在しません。写真、音声、翻訳テキストはすべてお手元のスマートフォンのメモリ上で処理され、決して端末外へ出ません。アプリ内利用解析も収集していません。

メニュー、看板、短い会話など日常の旅行用途であれば、ほぼ同等です。長文の正式な書類は、より大きなクラウドモデルを使う方が今でも仕上がりが良いでしょう。Cove はプライバシーとオフライン動作が完璧な流暢さよりも重要となるトレードオフのために作られています。