Formulas & Forces Lab vs TerraChron 9
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Formulas & Forces Lab
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Formulas & Forces Lab is an offline study portfolio for 6th grade Math and Physics. Instead of focusing on scores, students produce study artifacts: Explain-It cards, Worked-Solution rewrites, Mistake Pattern cards, session summaries, and revision plans. Practice and review prompts are used to generate reflections and structured write-ups that stay on-device. A built-in portfolio exporter creates a shareable PDF notebook from recent artifacts and active revision plans. No accounts, no analytics, and no network access—everything is bundled locally and stored privately on the device.
TerraChron 9
This offline study studio helps Grade 9 students master History and Geography. It features an Atlas for theory, terms, and timelines, guided Studio Runs for practice, and a Review Lab for creating revision cards. Each session concludes with a saved Notebook artifact and a daily check-in.
- Offline study studio
- History & Geography curriculum
- Interactive Atlas
- Guided Studio Runs
- Review Lab with Revision Cards
- Saved Notebook artifacts
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TerraChron 9 is an offline Grade 9 History & Geography Study Studio. Each session ends with a saved Notebook artifact in the learner’s own words (with v1/v2 revisions) and a calm Daily Passport check-in. Use the Atlas for short theory, key terms, and text-only timelines or place/climate facts, then complete guided Studio Runs with self-check and reflection. Review Lab builds focus sets from local mix-ups and saves Revision Cards for later review.
Screenshots
Verdict
Formulas & Forces Lab and TerraChron 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 | Formulas & Forces Lab | TerraChron 9 |
|---|---|---|
| Price | Free | Free |
| Rating | — | 1.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 | 13.0 |
| Further details — not scored | ||
| Size | 22 MB | 19 MB |
| Age rating | 4+ | 4+ |
| Developer | Tuan Do Bao | Kien Le Trung |
In-app purchases
Formulas & Forces Lab
No in-app purchases
TerraChron 9
No in-app purchases
Questions
Is Formulas & Forces Lab free?
Is TerraChron 9 free?
Do Formulas & Forces Lab or TerraChron 9 have ads?
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