Sleep Apps · Review
Lull Review
A sleep app from 冬魁 岳 — rated 4.7 stars by 723 App Store users.
App Store rating
4.7 / 5 (723 ratings)
Starting price
Free (in-app purchases vary)
Free tier
Yes
Platforms
iOS · iPadOS
Developer
冬魁 岳
Launched
2020
Our verdict
Lull holds a strong 4.7-star average across 723 App Store ratings and ranks #112 in App Store search results for "sleep sounds". This is a data-driven review compiled from its store listing, pricing, and user-rating profile — we have not yet completed hands-on testing, and a full editorial review is planned.
Data-driven review: this page is compiled from App Store data — the app’s real rating average and count, pricing, search ranking, and the developer’s published description (quoted, not paraphrased). We have not yet hands-on tested this app; a full editorial review is planned. Our hands-on-tested picks are marked throughout. Unsponsored, no affiliate influence.
Among the hundreds of options in the sleep app category, Lull (by 冬魁 岳) stands at a strong 4.7-star average across 723 App Store ratings, making it a smaller app still building its audience.
Its App Store listing describes it this way: “Are you troubled by falling asleep? Are you distressed by your fussy baby who doesn't sleep?” As with all listings, that is the developer's own framing — useful for understanding what the app aims to be.
This review is compiled from App Store data — the rating profile, pricing, ranking, and the developer's published description — rather than hands-on testing. We flag that openly: it tells you what the data supports, and our full editorial review will go deeper.
Pros & cons
What we like
- A strong 4.7-star average across 723 App Store ratings — real users rate it well.
- Free to download, so trying it costs nothing.
- Ranks #112 in App Store search for "sleep sounds" — genuine visibility in its category.
- Available since 2020, with an established presence on the store.
What we don’t
- We have not yet hands-on tested this app — this review reflects store data, not editorial experience.
- Like most free wellness apps, expect in-app subscription offers; check current pricing before committing.
- Smaller user base than the category leaders, so the rating sample is limited.
Best for / avoid if
Best for
- →People browsing beyond the big names in the sleep app category
- →Users who weigh real App Store ratings heavily (4.7 stars, 723 ratings)
- →Anyone who wants to try options at no cost
Avoid if
- →You want a deeply vetted, hands-on-tested pick — see our editorial reviews of BetterSleep, Calm, Pzizz
- →You need clinical or therapeutic support — no consumer app provides that
Pricing
Download
Free
Free to install from the App Store.
In-app purchases
Varies
Many apps in this category offer optional subscriptions — check the App Store listing for current in-app pricing.
What Lull is
Lull is a sleep app for iOS by 冬魁 岳, first released in 2020.
In the developer's words: “Are you troubled by falling asleep? Are you distressed by your fussy baby who doesn't sleep?”
Where Lull sits in the category
By the numbers: a strong 4.7-star average across 723 App Store ratings, ranking #112 in App Store search for "sleep sounds" (it also appears under "sleep sounds" at #112). That makes it a smaller app still building its audience.
Store ratings are not the whole story — they skew positive across this category — but a large sample at 4.7 stars is a meaningful signal that existing users find it does what it promises.
What the listing emphasizes
“Are you troubled by falling asleep? Are you distressed by your fussy baby who doesn't sleep?” — that is the pitch, in the developer's own words.
We quote the listing rather than paraphrase it so you can judge the developer's claims for yourself. Our hands-on editorial review, when published, will test those claims.
Where Lull falls behind
Editorial vetting. Unlike BetterSleep or Calm, we have not yet tested Lull hands-on.
Transparency of in-app pricing. App Store listings often reveal subscription costs only after download — check the in-app purchases section of the listing.
Brand ecosystem. The category leaders pair their apps with large content teams and published research; smaller apps rarely match that depth.
Lull vs. the category leaders
The sleep app category is anchored by BetterSleep, Calm, Pzizz — all of which we have reviewed editorially, hands-on.
Lull's case rests on its user-rating profile (4.7 stars, 723 ratings) and its free download. The leaders' case rests on vetted content depth and track record.
A sensible approach: read our editorial reviews of the leaders first, and try Lull for free if its specific angle appeals — App Store ratings this positive usually mean the core experience delivers.
Bottom line
Lull earns a strong 4.7-star average across 723 App Store ratings — real users like it. Until our hands-on review lands, treat this page as an honest data profile: strong signals, store-verified facts, and clearly marked limits.
Want a daily positivity practice in your own voice? Selfpause lets you record personalized affirmations, layer them with calming music, and keep them on your lock screen.
Try Selfpause FreeAlternatives to Lull
BetterSleep
4.3Build-your-own soundscapes with a generous free tier.
Read our review →
Calm
4.5Premium Sleep Stories and relaxation.
Read our review →
Pzizz
4.1Generative sleep and nap sessions.
Read our review →
Frequently asked questions
Is Lull free?+
Lull is free to download. Like most apps in this category it may offer in-app subscriptions — check the in-app purchases section of its App Store listing for current pricing.
How is Lull rated?+
It holds a 4.7-star average across 723 ratings on the US App Store — a smaller app still building its audience.
Who makes Lull?+
冬魁 岳, who released it in 2020. The App Store listing links to the developer's site and privacy policy.
Is this a hands-on review?+
Not yet — this review is compiled from App Store data: ratings, pricing, search ranking, and the developer's published description. A full editorial review is planned. For hands-on-tested picks in this category, see our reviews of BetterSleep, Calm, Pzizz.
A note on mental health: apps and online services can support wellbeing, but they are not a substitute for professional care. If you are struggling, a licensed professional can help — and if you are in crisis, contact your local emergency number or, in the US, call or text 988 (Suicide & Crisis Lifeline).