Physics 9 vs BioChem Sprint 9
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Physics 9
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Physics 9 is a fully offline app for Grade 9 students, bundling lessons, practice, assessments, mini-games, and progress tracking. The app runs without backend, audio, or internet, and saves XP, streaks, and coins locally.
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.
Screenshots
Verdict
Physics 9 and BioChem Sprint 9 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 | Physics 9 | BioChem Sprint 9 |
|---|---|---|
| Price | Free | Free |
| Update frequency | — | Every 2 days |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 | 13.0 |
| Further details — not scored | ||
| Size | 20 MB | 20 MB |
| Age rating | 4+ | 4+ |
| Developer | Dung Nguyen Tan | Nguyen Khanh Vy |
In-app purchases
Physics 9
No in-app purchases
BioChem Sprint 9
No in-app purchases
Questions
Is Physics 9 free?
Is BioChem Sprint 9 free?
Do Physics 9 or BioChem Sprint 9 have ads?
Other comparisons
