Last updated: November 7, 2026
Summary
NightBlend is a free sleep-sound mixer. We do not build an account for you, we have no servers, and we never receive your mixes, your recordings, or any audio you play. The app is supported by advertising, and our advertising partner is Google AdMob.
What stays on your device
- All sounds are generated on your device in real time. NightBlend does not stream or download audio files, and no audio is ever uploaded.
- Your volume levels, unlocked presets, sleep-timer setting, and ad-frequency counters are stored only in the app's local storage on your device.
- Deleting the app removes all of that data permanently.
What we collect
NightBlend itself collects nothing: no name, no email address, no account, no usage analytics of our own, and no crash-reporting service of our own.
However, Google AdMob is included in the app and may collect the following on behalf of advertisers, as described in Google's own documentation:
- Device identifiers (such as the advertising identifier / IDFA, when you have allowed tracking)
- Advertising data and information about how you interact with advertisements
- Product interaction data, such as that you opened a particular preset
- Approximate location derived from your IP address
- Performance and crash diagnostic data collected by the SDK
These data are used to deliver and measure advertising, including interest-based advertising. You can read Google's full policy at policies.google.com/technologies/ads.
App Tracking Transparency (ATT)
iOS requires apps to ask before tracking you across other companies' apps and websites. Before the first sound starts, NightBlend shows a short explanation, and then iOS shows its own permission dialog.
- If you allow tracking, ads are personalized and may be more relevant.
- If you decline, the app works exactly the same โ every core feature stays free and unlocked. You will simply see less relevant ads, and that reduces the ad revenue that keeps NightBlend free.
- You can change your decision later in Settings โ Privacy โ Tracking, and the current status is shown inside NightBlend at Settings โ Tracking permission.
Advertising in NightBlend
- Interstitial ads: a short full-screen ad may appear after you switch to a different preset. NightBlend limits these to keep the experience comfortable: no ads during the first 24 hours, at most one every 10 minutes, and no more than 3 per day.
- Rewarded video ads: entirely optional and always clearly labelled. You can watch one to unlock extra presets permanently, or to get 30 minutes without interstitials. You never have to watch an ad to use the core mixer.
- No in-app purchases and no subscription. Nothing is for sale inside NightBlend.
Children
NightBlend is rated 4+. It contains no user-generated content, no chat, no sharing of other people's content, and no external links other than this policy and the support page.
Your choices
- Decline or revoke tracking permission: Settings โ Privacy โ Tracking on your device.
- Reset advertising identifiers: Settings โ Privacy โ Tracking โ Reset Advertising Identifier on your device.
- Delete all local app data: delete the NightBlend app.
Changes to this policy
If this policy changes, the updated version will be published on this page with a new "Last updated" date. Material changes will also be noted in the App Store description.
Contact
Questions about this policy: ywlmq26@sina.com