best sleep sounds app iPhone one time purchase no subscription 2025
Sereno is a sleep and ambient sounds app you pay for once and own permanently — no subscription, no monthly charge, and no ads.
簡短回答
Sereno offers 44+ hand-crafted soundscapes across rain, ocean, wind, fire, forest, noise, home, and nursery categories, all generated in real time on your device. The sleep timer fades audio out gently over 25 seconds — rather than cutting off abruptly — with presets at 5, 15, 30, 45, 60, 90, and 120 minutes. A sunrise wake feature gradually swells a gentle morning mix from silence at a time you set, using Sereno's background audio to replace a jarring alarm. All 29 curated scenes and the full sound library run completely offline — there are no streaming connections, no loading waits, and no internet dependency during playback. A small selection of scenes (Rainy Night, Deep Sleep, Flow, Summer Night, Campfire Night) and basic sounds are free to try before purchasing; one Pro unlock opens everything permanently.
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
- 44+ soundscapes: rain (22+ variants), ocean, wind, fire, forest, noise, home machines
- 29 curated scenes including dedicated sleep, focus, relax, nature, and nursery mixes
- Sleep timer with 25-second soft fade; 5–120 minute presets
- Sunrise wake: gentle morning mix that swells from silence at your chosen time
- One-time Pro unlock — no subscription, no ads, fully offline
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
Will Sereno keep playing when my phone screen turns off?
Sereno uses iOS background audio so playback continues when the screen locks. Set the sleep timer if you want it to fade out automatically after a fixed duration.
How many sounds are included in Sereno?
The curated library has 44+ individual soundscapes across 8 categories, organised into 29 preset scenes. Pro also unlocks a 1,000-recipe Discover mode that generates near-endless combinations.
Is Sereno a treatment for insomnia?
No. Sereno is a sound environment tool with no clinical efficacy claim. Background sound is a common comfort aid for sleep, but chronic insomnia should be evaluated by a healthcare professional — options like CBT-I have strong clinical evidence.