Appworthy
App Store
Version 4.2.1 · 2026-01-21
Knowledge Trainer just got a lot more global! We’ve expanded existing question pools and added 8 new languages: Portuguese, Spanish, Swedish, Turkish, Danish, Finnish, Norwegian, and Polish.
Review signals only
App Store rating4.8★642 ratings
Price$6.99Listed price
Age4+Store age rating
Size177 MBiPhone download
CategoryGames
Developerthe binary family
At a glance
Full reportReview signals only. Review signals, not findings. Nothing here is an assessment.
From review signals only, 18 Oct 2026.
The store currently lists version 4.2.1, updated 2026-01-21.
Preview
Store screenshots supplied by the developer.
About this app
Trivia: Knowledge Trainer is the quiz app for smart people. It’s designed to stimulate your brain with over 6,000 high-quality, challenging, and informative questions.
2020 marks the 10th anniversary of this sophisticated trivia app. Since 2010, the game has helped more than 7 million players to improve their general knowledge. Our worldwide team has been and is continuously improving and updating the app.
Each lesson tests your wits with 10 questions from 10 different categories. The difficulty level depends on you: get an answer right, you'll move up a level. A wrong answer leads to an easier question. But you'll want to move up to improve your Knowledge Quotient, recalculated after every round.…
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
450 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
Supporting measurements. They are not a complete list of possible harms or positives. “Not assessed” means we could not measure it — never zero, 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
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 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
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 18 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
trivia-apple-408665134- Review signals scanned
- 18 Oct 2026
- Sources used
- User reviews
- Reviews read
- 450
- Package examined
- No package scan
- Measurement vocabulary
- 1.4
- Human inspection
- Not completed
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
- 4.80 ★ · 642 ratings
- Version
- 4.2.1
- Updated
- 21 Jan 2026
- Price
- $6.99
- Age rating
- 4+
- Size
- 177 MB
- Developer
- the binary family
- Category
- Games
- Listing price
- $6.99
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.