“I love getting "50% off lifetime " ads EVERY SINGLE TIME I open the app that I paid $125 for a year of premium, while I like the app and the audio is great for productivity and sleeping, I simply cannot handle adverts on the paid version…”
Independent automated assessment · 3 signal sources · 418 reviews scanned · analyzed 2026-10-04.
4.4 ★22,469 ratings
1M+Downloads
4+Age rating
—App size
Free · In-app purchasesIn-app purchases
About this app
Focus, relax, and sleep through the power of sound. Endel creates AI-powered sounds designed to support your everyday life. Backed by science, and enjoyed by millions worldwide.
Endel is powered by its patented core AI technology. It takes inputs like location, environment, and heart rate, to create the optimal personalized soundscape. This happens on the fly and allows Endel to reconnect your state with your circadian rhythm
• Relax – calms your mind to create feelings of comfort and safety
• Focus – boosts your productivity by helping you concentrate for longer…
Preview
Real screenshots from the store listing.
Independent evidence report
Evidence and review signals
This is where the page changes from an app-store listing into an evidence report: findings, important reviews, pricing and a dated history.
Which version this describes
When we ran this analysis, and what the store lists now.
We cannot tell which version of the app this analysis describes. It was run 2026-10-04 , and the app may have changed since.
The store currently lists version VARY, updated 2026-09-16.
What we measured
Each line is a measurement published as a measurement, never a verdict.
Each line is a measurement, published as a measurement. Where we have not looked, the line says so rather than reading as a zero.
Developer replies to reviews
Replies to at least 1 review in 20
Price in the store description
States no price and billing period
Cancelling, in the store description
Says how to cancel
Themes reported by reviewers
2 themes reported
Counted from the reviews we have read for this app. "No theme reported" means no theme reached our reporting threshold — it is not a finding that nothing is wrong with this app, and we do not say it is.
Five-star share of ratings
65–79% five-star
Arithmetic on the stores' own published rating counts. It says nothing about why the ratings fall where they do.
In the package we scanned
No package has been scanned for this app, so nothing is published about what it ships. That is an absence of evidence about the app, not a finding about it.
Graded bands · predicate set 1.4 · how these are measured
What the analysis found
App-specific findings, grouped by what each one rests on. How they are graded lives on its own page.
Positive evidence 1
Things this app does right, published at the same strengths as the catch list.
Developer says data deletion can be requested
The developer's data-safety disclosure on the store states that users can request deletion of their data, or the app's own text offers a way to delete the account. This restates what the developer declares; it is not a test of whether deletion works. Apple publishes no equivalent disclosure, so on an Apple-only listing only the app's own text can support it.
What we saw: The developer's store data-safety disclosure states that data deletion can be requested; we have not seen a deletion control in the app's own text
One source only — shown, not confirmed 2
A single kind of evidence. We publish these because withholding them would be the bigger distortion, and we do not treat any of them as a finding we stand behind.
Reported by users: Aggressive ad load
Advertising volume or placement that interrupts normal use: ads between every action, unskippable or forced full-screen ads.
What we saw: Aggressive ad load: raised by 5 distinct reviewers (1.2% of 418 reviews scanned)
Reported by users: Trial converts to a charge
The free trial demands a payment method up front and/or rolls into a paid subscription with no usable warning.
What we saw: Trial converts to a charge: raised by 8 distinct reviewers (1.9% of 418 reviews scanned)
Highlighted reviews
Representative public review excerpts shown as user reports, not Appworthy audit evidence.
“I like the sounds available, but they never change so become repetitive, doesn't feel like a lot of "science" going on. A few offer ability to adjust dynamically. Constant ads to upgrade to lifetime subscription. I find the UI very…”
“Updating my review... I have been a subscriber for years nows. Yet they keep giving me pop-ups to purchase a lifetime subscription which I almost accidentally clicked. After that experience I canceled my subscription and will not be…”
Assessment & version history
App changes and Appworthy events in one timeline.
Store listing updated to version VARY.
What this app sells
Useful store-disclosed pricing, kept below the app listing.
Items shown0
Lowest—
Highest—
Google Play does not publish per-purchase prices.