🛟 LetDrum — Support / 支援
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聯絡 / Contact：[email protected]
🇺🇸 English
What LetDrum is
LetDrum is a drum & rhythm learning game for children on iPhone and iPad — no drum kit needed. Kids can play touch drum pads with real drum samples, catch falling notes in rhythm levels, practice on a real practice pad (or a tabletop!) using the microphone, and even build their own drum kit out of water bottles and tin cans. A Theory Garden of mini-games turns note values and rests into play. It is completely free, ad-free, collects no data, and works fully offline.
Requirements
- iOS 17 / iPadOS 17 or later, iPhone and iPad.
- No account or login required. No internet connection needed.
- The microphone is optional — only the practice-pad and DIY drum-kit modes ask for it, and audio is analyzed on-device only (never recorded or uploaded).
Common questions
Is LetDrum really free? Are there ads or in-app purchases?
Yes — the initial release is 100% free with every feature unlocked, no ads, and no in-app purchases.
There's no sound / the drums are silent.
Check that your device volume is turned up and the silent switch is off. All drum sounds are generated on-device, so no internet is needed. If a "drums are napping" message appears, close and reopen the app.
The microphone mode doesn't hear my taps.
First run the click calibration (the app plays 8 clicks — tap along; this measures your device's audio delay so scoring is fair). Then: practice in a reasonably quiet room, keep the device within about an arm's length of where you tap, tap firmly (drumsticks on a practice pad or a tabletop work great), and avoid Bluetooth speakers/earphones — their delay is too large for rhythm games, so please use the built-in speaker or wired headphones.
Tips for the DIY drum kit (bottles & cans)
Pick containers that sound clearly different from each other: a big plastic bottle (half-filled with water) or a cardboard box for the kick, a crisp tin can for the snare, and a bunch of keys or a metal lid for the hi-hat. The app listens to each one and tells you if two sound too alike or if one rings too long (put a cloth under it). Please avoid glass containers — and enjoy the container hunt together!
How do I switch between English and Chinese?
LetDrum follows your device language by default. A grown-up can also override it in the Parent Area (Settings tab → parental gate → Language).
How is my child's data handled?
All progress and settings are stored on the device only and never uploaded. Microphone audio is analyzed live on-device and immediately discarded — never recorded. LetDrum collects no data at all. See our Privacy Policy.
Contact
Email us at [email protected]. We typically reply within 1–2 business days.
🇹🇼 繁體中文
LetDrum 是什麼
LetDrum（節奏小鼓手）是一款給孩子的 iPhone / iPad 爵士鼓節奏學習遊戲——家裡不需要有鼓。孩子可以敲真鼓採樣的觸控鼓面、玩下落音符的節奏關卡、拿鼓棒敲練習墊或桌面（麥克風模式），甚至用寶特瓶和鐵罐自組一套自己的鼓。樂理樂園把音符時值與休止符變成小遊戲。完全免費、零廣告、不收集資料、完全離線。
系統需求
- iOS 17 / iPadOS 17 以上，iPhone 與 iPad。
- 不需要帳號或登入，也不需要網路連線。
- 麥克風是選用的——只有練習墊模式與自組鼓組模式會請求，且聲音只在裝置上即時分析（不錄音、不上傳）。
常見問題
LetDrum 真的免費嗎？有廣告或內購嗎？
是的——首發版本 100% 免費、所有功能全開、沒有廣告、也沒有任何 App 內購買。
沒有聲音 / 鼓不會響。
請確認裝置音量已調高、靜音開關已關閉。鼓聲都在裝置本機播放，不需要網路。若出現「鼓在打盹」的訊息，請關閉 App 後重新開啟。
麥克風模式聽不到我的敲擊。
請先做一次 click 校正（App 會播 8 下 click，跟著敲——這是在測量裝置的音訊延遲，讓判定公平）。另外：在安靜一點的環境練習、裝置放在敲擊點約一隻手臂內、敲擊確實一點（鼓棒敲練習墊或桌面效果最好），並且避免使用藍牙喇叭/耳機——藍牙延遲太大不適合節奏遊戲，請用內建喇叭或有線耳機。
自組鼓組（寶特瓶鐵罐）有什麼訣竅？
挑聲音差異大的容器：大鼓用大寶特瓶（裝半瓶水）或紙箱、小鼓用清脆的鐵罐、hi-hat 用鑰匙串或金屬蓋。App 會聽每個容器的聲音，告訴你哪兩個太像、哪個餘音太長（墊塊布就好）。請避開玻璃容器——和孩子一起找容器本身就是最好玩的部分！
如何切換中文 / 英文？
LetDrum 預設跟隨裝置語言。大人也可以在家長區覆寫（設定分頁 → 家長閘 → 語言）。
孩子的資料怎麼處理？
所有進度與設定只存在裝置本機，不會上傳。麥克風聲音在裝置上即時分析後立即丟棄，絕不錄音。LetDrum 完全不收集任何資料。詳見隱私權政策。
聯絡我們
請寄信至 [email protected]，通常 1–2 個工作天內回覆。