Appworthy
App Store
Version 1.3 · 2025-12-11
Change app category
Store ratingNo rating
Price$0.99Listed price
Age4+Store age rating
Size55 MBiPhone download
CategoryHealth & Fitness
DeveloperSINN Co.,Ltd
What we found
Full reportToo little checked to say Store information only. We haven’t analysed this app or read its reviews yet.
Money
- $0.99 to download.
Not yet tested.
The store currently lists version 1.3, updated 2025-12-11.
Preview
Store screenshots supplied by the developer.
About this app
JapanVoice – The Sound of Japanese Serenity
Travel through Japan with your ears.
A relaxing BGM app — completely offline, ad-free, and beautifully simple.
【Features】
Works fully offline: Enjoy anywhere, even without internet.
No ads or in-app purchases: Pure focus and peace, always.
Intuitive design: Easy for anyone to use — from children to seniors.
【Sound Collection – Experience the soul of Japan through sound】
Every scene was carefully recorded to capture the quiet beauty of Japanese life —
the sounds, the air, and the stillness between them.
Hand-Held Fireworks
Gentle sparks bloom in the summer night — a soft crackle that evokes warm memories of a festival evening.
Shinto Shrine
Footsteps under a torii gate, the ring of a bell, and the calm breath of sacred air.
A tranquil place where time seems to slow down.…
From the developer’s store description.
For developers and the curious
The full report
The evidence, sources, measurements and versions behind every label above.
Findings and evidence
Not yet tested. No analysis has been published for this app. A missing label is not a clean bill of health.
What reviewers report
No review analysis published for this app.
Measurements
“Not assessed” means we could not measure it. It is never a zero and never a pass.
From store data and reviews
Developer replies to reviews
Not assessed
Fewer than 50 reviews scanned — too few to state a rate
Price in the store description
The store description doesn’t list prices (most don’t)
Cancelling, in the store description
The store description doesn’t say how to cancel (most don’t)
Themes reported by reviewers
Not assessed
This app's reviews have not been assessed yet
Five-star share of ratings
Not assessed
No rating histogram has been captured for this app
In the app 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, not a finding.
Sensitive permissions
Not assessed
No package has been scanned for this app
Analytics or tracking SDKs in the scanned package
Not assessed
No package has been scanned for this app
Advertising SDKs in the scanned package
Not assessed
No package has been scanned for this app
How we know
Supporting measurements: not a complete list of possible harms or positives. Measurement vocabulary 1.4 · how these are measured
Versions and dates analysed
Not yet tested. No analysis has been run for this app, so there is no version or date to report.
Store update history
Each store’s release notes, as the developer wrote them. They are the developer’s words, not ours.
Assessment record
- Status
- Not yet tested
- App identifier
japanvoice-bgm-for-sleep- Sources used
- None recorded
- Reviews read
- None recorded
- Package examined
- No package scan
- Human inspection
- Not completed
How we know
- Measurement vocabulary
- 1.4
Store facts
What the stores publish. Store ratings are the stores’ numbers, not Appworthy’s, and are never averaged across stores.
App Store
- Store rating
- Not supplied
- Version
- 1.3
- Updated
- 11 Dec 2025
- Price
- $0.99
- Age rating
- 4+
- Size
- 55 MB
- Developer
- SINN Co.,Ltd
- Category
- Health & Fitness
- Listing price
- $0.99
No itemized purchase list is available for this listing.
Method and limits
What a missing label means
Not yet tested. No analysis has been published for this app, so there is no method to describe for it yet. A missing label is not a clean bill of health: it means nothing has been read, not that nothing is wrong.
Limits of this report
- A package scan is static. It identifies code and text in one Android build. It does not measure a live ad session, test a deletion request, or count the steps needed to cancel.
- Reviews keep their sample. A review-only charge shows distinct reviewers, the share and the sample size, and is published only once it clears that label’s published threshold. Calibration labels are machine-drafted and not yet confirmed by a person.
- Not assessed is a state. It is never a zero and never a pass.
- A missing label is not a clean bill of health. It means the evidence did not support one, not that the app is problem-free.
Not yet human-reviewed. A human review gives an app hands-on, recorded measurements. None has been run for this app. Hands-on inspections are not yet open.
Request a correction
Write to [email protected], or use the form. Name the finding, the app version and the evidence that needs correcting. Factual corrections are free and never depend on buying anything.