Appworthy
Google Play
Version 0.4.7 · 2015-11-21
No release notes were provided for this version.
Google Play rating4.2★997 ratings
PriceFreeListed price
Age4+Store age rating
CategoryLifestyle
DeveloperSkrivarna Software
What we found
Full reportToo little checked to say Only reviews have been read so far (169 reviews). The app itself hasn’t been analysed.
Money
- Free to download.
From review signals only, 29 Oct 2026.
The store currently lists version 0.4.7, updated 2015-11-21.
Preview
Store screenshots supplied by the developer.
About this app
Come on, just admit it! You are a little nostalgic and fondly remember the good old days when a man was a man, a mouse a mouse and a synth ... well, when a synth was a pocket calculator or the other way around.
Casio's strange VL-1 instrument sold 1,000,000 units between 1979 and 1984. Trio, the German band, used it to record their huge hit "DaDaDa", and bands like Human League, Devo, The Cars followed suit. And 30 years later it is still backing tracks by Moby and Fergie.
But you don't have to search Ebay to enjoy playing the "Fantasy" sound over a nice "Rock-2" blip. Now you can have the "Unterlanders Heimweh" demo tune right there when you need it, feeling a little lowlandish homesick. The VL-Tone app contain the factory presets and rhythm patterns in all their distorted and noisy glory, carefully sampled from an original Casio VL-1.…
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
No findings are published for this listing. These are review signals, not findings: nothing here is an assessment.
No recurring theme reached our reporting threshold in the reviews we scanned.
What reviewers report
169 reviews scanned. These are signals from public reviews, not findings. Nothing here is an assessment.
No recurring theme reached our reporting threshold in the reviews we scanned. That does not establish that reviewers had no problems.
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
Replies to fewer than 1 review in 20
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
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
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 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
Review signals only. No automated analysis of the app itself has been run, so there is no analysed version to report; the signals were read from public reviews on 29 Oct 2026.
Store update history
Each store’s release notes, as the developer wrote them. They are the developer’s words, not ours.
Assessment record
- Status
- Review signals only
- App identifier
vl-tone-synth- Review signals scanned
- 29 Oct 2026
- Sources used
- User reviews
- Reviews read
- 169
- 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.
Google Play
- Store rating
- 4.22 ★ · 997 ratings
- Version
- 0.4.7
- Updated
- 21 Nov 2015
- Price
- Free
- Age rating
- 4+
- Size
- Not supplied
- Developer
- Skrivarna Software
- Category
- Lifestyle
- Listing price
- Free
No itemized purchase list is available for this listing.
Method and limits
How a review signal works
A review signal is produced automatically from public app reviews by a classifier — never by a hands-on Appworthy test, and never by a human analyst. It exists so a real, not-yet-audited app can carry more than a blank “Not yet tested” listing, without ever being mistaken for an assessment.
A theme only appears above once at least 5 distinct reviews corroborate it — one angry review can never tag an app. These thresholds are published settings and may be tuned as coverage grows.
It carries no confirmed findings — reviews are one kind of evidence, and nothing here has been hands-on tested. The moment Appworthy publishes a full assessment of this app, it replaces this signal, permanently.
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 replaces this review-derived signal with hands-on, recorded measurements. 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.