“Free trial? Sure. — This app hopes you forget your free trial so they can charge you weekly as there is no way to use it unless you sign up for a free trial and if you forget to cancel you’ll be automatically charged.”
Public review signal · 161 reviews scanned · scope limited to review patterns.
4.6 ★8,378 ratings
—Downloads
4+Age rating
174 MBApp size
FreeIn-app purchases
About this app
A helpful app that allows you to play sounds at different frequencies can be used for various purposes such as relaxation, meditation, or dog training. Additionally, it can be an excellent tool for dog training by using specific sound frequencies to capture the dog's attention, reinforce positive behavior, and assist in training commands more effectively.
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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.
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 fewer than 1 review in 20
Price in the store description
States no price and billing period
Cancelling, in the store description
Does not say how to cancel
Themes reported by reviewers
No theme 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
80–89% 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.
Trial converts to a charge5 reviews · user report
Paywall blocks the basics5 reviews · user report
Highlighted reviews
Representative public review excerpts shown as user reports, not Appworthy audit evidence.
“It works. But the paywall sucks. — I used it to clean out my iPhone 17 Pro speaker (the top one) when water had gotten into it. I got the app, and the low hum tone from the app combined with some taps of my phone on my pants at the same…”
“Will charge you for starting free trial — Upon starting 3 day free trial, my card was charged $31.79 and overdrafted my account. I always use Apple Pay and it never goes through if there aren’t enough funds to cover the charge that way…”
Assessment & version history
App changes and Appworthy events in one timeline.
Store listing updated to version 2.27.0.
What this app sells
Useful store-disclosed pricing, kept below the app listing.
Business modelFree
Prices and terms as disclosed by the store listing.