不需要。App 可以在 iPhone 上獨立運作，所有功能都可以使用。如果您有 Apple Watch，消耗熱量的數據會更精準，但並非必要條件。

原始健康資料不會上傳，僅儲存在您的裝置本地，或透過 Apple HealthKit 同步（受 Apple 保護），開發者無法存取。唯一例外是選用的「好友群組」：只有在您主動加入群組後，才會把每日彙總數字（熱量、步數、飲水量、運動分鐘數等）與暱稱分享給同群組成員，不含逐筆飲食紀錄與原始健康資料，退出群組即刪除。詳細說明請參閱隱私權政策。

點擊右上角齒輪圖示，進入「設定 → 健康設定」，可調整每週減重目標或手動設定每日攝入目標。App 也可以根據您的 BMR 與活動量自動計算。

您可以使用「自訂食物」功能手動輸入食物名稱與熱量。搜尋支援 USDA 美國農業部資料庫與 Open Food Facts 兩個資料來源，涵蓋大量台灣、亞洲及西方食品。

刪除 App 後，App 內的本機記錄（如飲食日記設定）將一併刪除。但已寫入 Apple 健康 App 的資料仍會保留，您可以在「健康」App 中管理或刪除。

歡迎直接寄信至 Calorie.Recycle@gmail.com，說明問題發生的步驟或您的建議。我們非常重視每一條回饋，並盡快回覆。

No. The app works fully on iPhone alone. An Apple Watch improves the accuracy of calorie burn data, but is not required.

Your raw health data is not uploaded; it stays on your device or syncs through Apple HealthKit (protected by Apple), and the developer has no access to it. The one exception is the optional Friend Groups feature: only after you join a group are daily summary numbers (calories, steps, water, workout minutes, etc.) and your nickname shared with that group's members, never itemized food logs or raw health data, and leaving the group deletes them. See our Privacy Policy for details.

Tap the gear icon in the top right, then go to Settings → Health Settings. You can set a weekly weight loss goal or enter a manual daily intake target. The app can also auto-calculate based on your BMR and activity level.

Use the Custom Food Entry feature to manually add any food with its name and calorie count. Search covers both the USDA FoodData Central and Open Food Facts databases, with extensive coverage of Asian and Western foods.

Deleting the app removes all local data (food diary, settings). Data already written to Apple Health remains there and can be managed from the Health app.

Email us at Calorie.Recycle@gmail.com with a description of the issue or your suggestion. We read every message and respond as quickly as possible.