ChemForge 9 vs PH
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
PH
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Pattern Snap is a fully offline reasoning studio for structured pattern practice. Observe a pattern briefly, respond without timer stress, explain your thinking, then save one read-only Snap Card. Use 5 focused modes (Mirror Snap, Rule Snap, Next Snap, Odd Snap, Shift Snap), review your card library, and create linked revisions to track how your understanding improves over time.
Screenshots
Verdict
ChemForge 9 and PH 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 | ChemForge 9 | PH |
|---|---|---|
| Price | Free | Free |
| Update frequency | Fortnightly | — |
| 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 | 31 MB | 33 MB |
| Age rating | 4+ | 4+ |
| Developer | Phuong Ma Thi | Hoang Pham Huy |
In-app purchases
ChemForge 9
No in-app purchases
PH
No in-app purchases
