Valve Explorer vs Lemma Box
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Valve Explorer
Read full descriptionHide full description
Valve Explorer is an educational reference for industrial and engineering valves. Learn valve types, applications, and terminology with quizzes and flashcards. Fully offline.
Lemma Box
Read full descriptionHide full description
Lemma Box is a private offline vocab desk — file word decks, lemmas, and flashcards, then find any card before the quiz.
Screenshots
Verdict
Valve Explorer and Lemma Box are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | Valve Explorer | Lemma Box |
|---|---|---|
| Price | Free | Free |
| Update frequency | Weekly | — |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 13.0 | 13.0 |
| Further details — not scored | ||
| Size | 57 MB | 59 MB |
| Age rating | 4+ | 4+ |
| Developer | Pham Van Thanh | Vinyl Folio |
In-app purchases
Valve Explorer
No in-app purchases
Lemma Box
No in-app purchases
Questions
Is Valve Explorer free?
Is Lemma Box free?
Do Valve Explorer or Lemma Box have ads?
Other comparisons
