# わかる！算数 小学３年【下】 vs 算数忍者〜九九の巻〜完全版

The clearest difference is review sentiment: わかる！算数 小学３年【下】 at 100% against 算数忍者〜九九の巻〜完全版's 0%. 算数忍者〜九九の巻〜完全版's advantage is price ($4.99 vs $9.99) and update cadence (every 5 months vs every 10 months). On ads and in-app purchases there is nothing between them.

わかる！算数 小学３年【下】 costs $9.99 and 算数忍者〜九九の巻〜完全版 $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

わかる！算数 小学３年【下】 ships an update every 10 months, 算数忍者〜九九の巻〜完全版 every 5 months. The most recent releases landed on June 5, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | わかる！算数 小学３年【下】 | 算数忍者〜九九の巻〜完全版 |
| --- | --- | --- |
| Price | $9.99 | **$4.99** |
| Positive reviews | **100.0% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 10 months | **Every 5 months** |
| Monetization | Paid | — |
| Size | 62 MB | 133 MB |
| Requires iOS | 15.0 | **11.0** |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [がくげい](https://appshunter.io/developer/415230275) | [Fantamstick](https://appshunter.io/developer/563146308) |

## 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


### 算数忍者〜九九の巻〜完全版

[App page](https://appshunter.io/ios/app/id1483173959)

**Features:** macOS Compatibility

**In-app purchases:** none


## 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 算数忍者〜九九の巻〜完全版 free?

算数忍者〜九九の巻〜完全版 costs $4.99, with no in-app purchases.

### Do わかる！算数 小学３年【下】 or 算数忍者〜九九の巻〜完全版 have ads?

Neither わかる！算数 小学３年【下】 nor 算数忍者〜九九の巻〜完全版 shows ads.

### Which is updated more often, わかる！算数 小学３年【下】 or 算数忍者〜九九の巻〜完全版?

わかる！算数 小学３年【下】 ships an update every 10 months, and 算数忍者〜九九の巻〜完全版 every 5 months. Most recently, わかる！算数 小学３年【下】 was updated on June 5, 2026 and 算数忍者〜九九の巻〜完全版 on September 10, 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.*