BioChem Sprint 9 vs Valve Explorer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
BioChem Sprint 9
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Offline Grade 9 Bio+Chem Study Sprint Studio. Each sprint ends with a saved result, a required “In my own words…” note, and (if needed) a Mistake Reason. Revision Mode uses your notes + reasons to build Focus Sets and create revision cards you keep.
Valve Explorer
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Valve Explorer is an educational reference for industrial and engineering valves. Learn valve types, applications, and terminology with quizzes and flashcards. Fully offline.
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Verdict
The clearest difference is update cadence: BioChem Sprint 9 at every 2 days against Valve Explorer's weekly. On price, ads, in-app purchases and device support there is nothing between them.
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.
BioChem Sprint 9 ships an update every 2 days, Valve Explorer weekly. The most recent releases landed on October 31, 2026 and October 24, 2026 respectively.
| Parameter | BioChem Sprint 9 | Valve Explorer |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 days — better | Weekly |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 13.0 | 13.0 |
| Further details — not scored | ||
| Size | 20 MB | 57 MB |
| Age rating | 4+ | 4+ |
| Developer | Nguyen Khanh Vy | Pham Van Thanh |
In-app purchases
BioChem Sprint 9
No in-app purchases
Valve Explorer
No in-app purchases
Questions
Is BioChem Sprint 9 free?
Is Valve Explorer free?
Do BioChem Sprint 9 or Valve Explorer have ads?
Which is updated more often, BioChem Sprint 9 or Valve Explorer?
Other comparisons
