Physics 9 vs H
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.
H
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OptionCollapse is an offline decision reduction app that helps users finish a choice instead of keeping options open forever. Start with 3-6 options, eliminate one at a time through structured modes, reach the final pair, and commit to one winner. Each completed run is saved as a read-only Collapse Card with timeline, reasoning, and version history.
Screenshots
Verdict
Physics 9 and H 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 | H |
|---|---|---|
| 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 | 21 MB |
| Age rating | 4+ | 4+ |
| Developer | Dung Nguyen Tan | Thu Nguyen Thi Anh |
In-app purchases
Physics 9
No in-app purchases
H
No in-app purchases
