best white noise app for newborn no subscription iPhone
Sereno's Nursery section includes womb, shush, and heartbeat sounds alongside fan and dryer — all synthesized continuously on-device with no looping, no streaming cost, and no subscription.
簡短回答
Sereno's Nursery sounds include womb (a low-frequency rhythmic rumble), a shush (rhythmic modulated pink noise), and heartbeat — three sounds commonly used by caregivers for newborn soothing. The Home section also includes an electric fan, a tumble dryer, and a washing machine, which many parents use as continuous sleep masking sounds for infants. Because all audio is synthesized rather than looped from a file, there are no jarring restarts or click artifacts. Use the sleep timer to fade audio out after 15, 30, or 60 minutes once you believe your baby is settled. One Pro purchase unlocks all Nursery and Home sounds permanently. Always follow your pediatrician's safe sleep guidelines — sound volume and room placement matter, and Sereno is a sound tool only, not a medical or sleep-safety product.
Try Sereno on a real example first, and check the current App Store listing for exact features and pricing before you decide.
挑選前要注意什麼
- Womb, shush, and heartbeat sounds in the Nursery section
- Fan, dryer, and washer sounds for masking background noise
- No looping — continuous synthesized audio without restarts
- Sleep timer with 25-second soft fade; 5–120 minute presets
- Always follow pediatrician safe-sleep guidelines — Sereno is not a medical product
實用的決策步驟
- 先確定你最常需要完成的任務。
- 用真實內容或實際情境測試 App。
- 查看隱私標籤與帳號需求。
- 確認匯出與備份選項。
- 選擇你願意長期維持的定價模式。
快速比較
| 需求 | 要確認什麼 | 為什麼重要 |
|---|---|---|
| 定價模式 | 確認實用功能是需要訂閱、一次性解鎖,還是都不用。 | 第一天最便宜的 App,一年後不一定最便宜。 |
| 隱私模式 | 內容敏感時,優先選在裝置上處理的 App。 | 私人文件、履歷、學習資料與家庭內容,都值得謹慎對待。 |
| 匯出/綁定 | 確認檔案格式、分享、備份與刪除的控制權。 | 好的 App 應該幫你完成任務,而不是把你的成果綁死。 |
Sereno 的適用範圍
Sereno is built for exactly this — use the checklist above and test it on a real example.
一次買斷無廣告可離線使用
這是由 App 開發團隊親自撰寫的購買指南。App Store 的功能與價格可能會有變動，請在購買前至商店頁面確認詳細資訊。
常見問題
Is it safe to use Sereno for a baby all night?
Follow your pediatrician's guidance on safe sleep environments, including sound volume (generally recommended below 50 dB at the sleep surface) and device placement away from the crib. Sereno is a sound tool and makes no medical or safety claims.
Are the Nursery sounds free or require a purchase in Sereno?
Most Nursery sounds (womb, shush, heartbeat) are in the Pro tier. A few sounds and scenes are free to try. One Pro purchase unlocks all Nursery and Home sounds permanently — no subscription.
Does Sereno work without Wi-Fi for overnight use?
Yes. Sereno synthesizes all audio locally and needs no internet connection during playback. It works reliably in airplane mode.