# Number Island 2 — Subtract, Number Line, Make 10

> Subtract, Number Line, Make 10 (iPhone/iPad app by YUCHEN CHANG.)

- Source: https://appshunter.io/ios/app/number-island-2/id6796366984 (this page in markdown: same URL + `.md`)
- Developer: [YUCHEN CHANG](https://appshunter.io/developer/1888769274)
- Category: Education, Games, Family
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 14.0 · 265 MB
- Languages: American English
- Released: 2026-08-10
- Data updated: 2026-09-01
- User reviews in markdown: https://appshunter.io/ios/app/number-island-2/id6796366984/reviews.md

## What is Number Island 2?

The same little fox has grown up and sailed off to a brand-new archipelago! **Number Island 2** picks up right where the original left off — addition within 10 — and takes kids further into subtraction within 10, the 1–20 number line, making ten, and addition/subtraction with carrying and borrowing within 20.

**Six islands, six hands-on ways to play**
Every island introduces a brand-new gesture-based activity, turning abstract math into something kids can touch, drag, and manipulate:

- Island 1 — Story Addition: fruit and shells appear in two groups, then combine so kids can count the total
- Island 2 — Take Away: drag objects off-screen and count what's left to practice subtraction
- Island 3 — Number Line: hop the fox along a number line, connecting quantity to position
- Island 4 — Ten-Frame: fill a ten-frame grid with objects to practice "making a ten"
- Island 5 — Carry Bridge: move pieces from a second tray to fill the first, discovering how carrying works
- Island 6 — Borrow Cave: break a bundle of ten into loose pieces, discovering how borrowing works

**Try before you decide, honestly labeled**
All 10 levels of Island 1 (Story Addition) are open to everyone — enough to fully experience the core gameplay. When you finish Island 1 or want to unlock more, you'll see a single in-app purchase option that unlocks Islands 2 through 6, all at once. It's a one-time purchase, not a subscription — no ads, and no repeated purchase pop-ups.

**Designed for kids, with parents in mind**
- Bilingual (Mandarin Chinese and English) voice narration guides every step — kids can play without needing to read
- No failure states: wrong answers get a gentle nudge to try again, never a penalty or a dead end
- Every level's first completion earns a sticker, building toward a 60-sticker collection
- A parental gate (a two-digit multiplication problem) sits in front of the purchase screen to prevent accidental buys
- **We collect no personal data, show no ads, and use no third-party analytics or tracking** — parents can hand this over with confidence

Recommended ages: 5–7, bridging preschool and first-grade math.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Unlock All Islands | $3.99 | one-time |



## Version history (last 2 releases)

### 1.0.1 — 2026-08-11

Fixes Restore Purchases: unlocked content is now correctly restored after reinstalling or switching to a new device.

### 1.0.0 — 2026-08-10

No release notes.

## More apps by YUCHEN CHANG

- [夜間微光](https://appshunter.io/ios/app/id6761302555)
- [Maru 陪你超慢跑](https://appshunter.io/ios/app/maru/id6771317752)
- [金灣 Soleil Bay](https://appshunter.io/ios/app/soleil-bay/id6785552553)
- [讚爆了！網紅生存戰](https://appshunter.io/ios/app/id6790083212)
- [鋼鐵前線：三路對決](https://appshunter.io/ios/app/id6794135509)

All apps by YUCHEN CHANG: https://appshunter.io/developer/1888769274

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-01.*