# わかる！算数 小学４年【上】 vs Soroban66

The clearest difference is update cadence: Soroban66 at every 3 weeks against わかる！算数 小学４年【上】's every 37 months. Soroban66 also leads on price ($3.99 vs $9.99). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

わかる！算数 小学４年【上】 costs $9.99 and Soroban66 $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

わかる！算数 小学４年【上】 ships an update every 37 months, Soroban66 every 3 weeks. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | わかる！算数 小学４年【上】 | Soroban66 |
| --- | --- | --- |
| Price | $9.99 | **$3.99** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 37 months | **Every 3 weeks** |
| Monetization | — | Paid |
| Size | 50 MB | 29 MB |
| Requires iOS | **15.0** | 16.0 |
| Devices | iPad | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [がくげい](https://appshunter.io/developer/415230275) | [Masashi Fujishiro](https://appshunter.io/developer/1619460749) |

## What reviewers say

### わかる！算数 小学４年【上】

[App page](https://appshunter.io/ios/app/id897322501)

**In-app purchases:** none


### Soroban66

[App page](https://appshunter.io/ios/app/soroban66/id1661734047)

Practice multiplication, division, and addition with customizable difficulty. Includes dictation exercises and a flash anzan mode for rapid calculation. Offers personalized routines and timed challenges.

**Highlights:** Multiplication and division practice, Customizable addition exercises, Number dictation for sums, Flash Anzan rapid calculation, Personalized routine creation, Timed challenges

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

**In-app purchases:** none


## Frequently asked questions

### Is わかる！算数 小学４年【上】 free?

わかる！算数 小学４年【上】 costs $9.99, with no in-app purchases.

### Is Soroban66 free?

Soroban66 costs $3.99, with no in-app purchases.

### Do わかる！算数 小学４年【上】 or Soroban66 have ads?

Neither わかる！算数 小学４年【上】 nor Soroban66 shows ads.

### Which is updated more often, わかる！算数 小学４年【上】 or Soroban66?

わかる！算数 小学４年【上】 ships an update every 37 months, and Soroban66 every 3 weeks. Most recently, わかる！算数 小学４年【上】 was updated on November 1, 2026 and Soroban66 on November 3, 2026.

---

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