VN vs ChemForge 9
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
VN
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VN Physics 7 is an offline study companion for Vietnamese Grade 7 students. It offers clear physics lessons, topic-based quizzes, mock exams, and engaging mini-games. Students can track learning streaks, earn badges, and review quiz history to improve exam readiness anytime, anywhere.
ChemForge 9
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ChemForge 9 is a Grade 9 chemistry practice studio focused on reasoning and writing. Work through prompts, explain ideas in your own words, and turn errors into corrections you can revisit. Scores are optional signals, while your saved notes and revisions become the real study material—kept locally on your device.
Screenshots
Verdict
The clearest difference is update cadence: ChemForge 9 at fortnightly against VN's every 2 months. 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.
VN ships an update every 2 months, ChemForge 9 fortnightly. The most recent releases landed on September 13, 2026 and September 22, 2026 respectively.
| Parameter | VN | ChemForge 9 |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 months | Fortnightly — better |
| 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 | 22 MB | 31 MB |
| Age rating | 4+ | 4+ |
| Developer | Dung Do Tri | Phuong Ma Thi |
In-app purchases
VN
No in-app purchases
ChemForge 9
No in-app purchases
