# わかる！算数 小学３年【下】 vs よくわかる算数小学４年（ダンケ）

The clearest difference is price: よくわかる算数小学４年（ダンケ） at Free against わかる！算数 小学３年【下】's $9.99. よくわかる算数小学４年（ダンケ） also leads on device support (3 vs 1) and iOS requirement (13.5 vs 15.0). わかる！算数 小学３年【下】's advantage is in-app purchases (none vs 1). On update cadence and ads there is nothing between them.

よくわかる算数小学４年（ダンケ） is free to download; わかる！算数 小学３年【下】 costs $9.99 up front. よくわかる算数小学４年（ダンケ） sells 1 one-off in-app purchase. わかる！算数 小学３年【下】 asks for nothing beyond the download.

わかる！算数 小学３年【下】 ships an update every 10 months, よくわかる算数小学４年（ダンケ） every 18 months. The most recent releases landed on November 1, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | わかる！算数 小学３年【下】 | よくわかる算数小学４年（ダンケ） |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 10 months** | Every 18 months |
| Monetization | Paid | — |
| Size | 62 MB | 25 MB |
| Requires iOS | 15.0 | **13.5** |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [がくげい](https://appshunter.io/developer/415230275) | [Norio Takeda](https://appshunter.io/developer/1485221811) |

## What reviewers say

### わかる！算数 小学３年【下】

[App page](https://appshunter.io/ios/app/id684077829)

This app helps third-grade students master the second half of their math curriculum through engaging animations and practice drills. It covers topics like decimals, fractions, and geometry, aligning with national educational standards.

**Highlights:** Covers second half of 3rd-grade math curriculum, 22 units and 44 corners of content, Animation and drill-based learning, Full voice-overs with cute characters, Progress tracking with clear indicators, No in-app purchases or ads

**In-app purchases:** none


### よくわかる算数小学４年（ダンケ）

[App page](https://appshunter.io/ios/app/id1532071298)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ゴールドコイン | $7.99 | one-time |


## Frequently asked questions

### Is わかる！算数 小学３年【下】 free?

わかる！算数 小学３年【下】 costs $9.99, with no in-app purchases.

### Is よくわかる算数小学４年（ダンケ） free?

よくわかる算数小学４年（ダンケ） is free to download, with in-app purchases available.

### Do わかる！算数 小学３年【下】 or よくわかる算数小学４年（ダンケ） have ads?

Neither わかる！算数 小学３年【下】 nor よくわかる算数小学４年（ダンケ） shows ads.

### Which is updated more often, わかる！算数 小学３年【下】 or よくわかる算数小学４年（ダンケ）?

わかる！算数 小学３年【下】 ships an update every 10 months, and よくわかる算数小学４年（ダンケ） every 18 months. Most recently, わかる！算数 小学３年【下】 was updated on November 1, 2026 and よくわかる算数小学４年（ダンケ） on November 7, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*