# わかる！算数 小学４年【下】 Lite vs LD

The clearest difference is update cadence: LD at every 4 months against わかる！算数 小学４年【下】 Lite's every 36 months. わかる！算数 小学４年【下】 Lite's advantage is iOS requirement (9.0 vs 16.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

わかる！算数 小学４年【下】 Lite ships an update every 36 months, LD every 4 months. The most recent releases landed on September 29, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | わかる！算数 小学４年【下】 Lite | LD |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 36 months | **Every 4 months** |
| Size | 47 MB | 122 MB |
| Requires iOS | **9.0** | 16.0 |
| Devices | iPad | iPad |
| Age rating | 4+ | 4+ |
| Developer | [がくげい](https://appshunter.io/developer/415230275) | [一般社団法人 日本LD学会](https://appshunter.io/developer/1373157749) |

## What reviewers say

### わかる！算数 小学４年【下】 Lite

[App page](https://appshunter.io/ios/app/lite/id897335206)

**Features:** macOS Compatibility

**In-app purchases:** none


### LD

[App page](https://appshunter.io/ios/app/ld-skaip/id1373157750)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is わかる！算数 小学４年【下】 Lite free?

わかる！算数 小学４年【下】 Lite is free to download, with no in-app purchases.

### Is LD free?

LD is free to download, with no in-app purchases.

### Do わかる！算数 小学４年【下】 Lite or LD have ads?

Neither わかる！算数 小学４年【下】 Lite nor LD shows ads.

### Which is updated more often, わかる！算数 小学４年【下】 Lite or LD?

わかる！算数 小学４年【下】 Lite ships an update every 36 months, and LD every 4 months. Most recently, わかる！算数 小学４年【下】 Lite was updated on September 29, 2026 and LD on October 16, 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.*