# 棋譜ドリル vs NBackCalc

The clearest difference is in-app purchases: 棋譜ドリル at none against NBackCalc's 1. 棋譜ドリル also leads on iOS requirement (15.0 vs 17.0). NBackCalc's advantage is ads (none vs shown) and update cadence (every 2 days vs every 3 months). On price and device support there is nothing between them.

Both are free to download. NBackCalc sells 1 one-off in-app purchase. 棋譜ドリル asks for nothing beyond the download.

棋譜ドリル ships an update every 3 months, NBackCalc every 2 days. The most recent releases landed on October 5, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | 棋譜ドリル | NBackCalc |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 3 months | **Every 2 days** |
| Size | 41 MB | 1 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Yasushi Hino](https://appshunter.io/developer/1574490548) | [YOSHINORI KONNO](https://appshunter.io/developer/1883074860) |

## What reviewers say

### 棋譜ドリル

[App page](https://appshunter.io/ios/app/id1630647384)

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

**In-app purchases:** none


### NBackCalc

[App page](https://appshunter.io/ios/app/nbackcalc-working-memory/id6760832395)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 開発者を応援する | $0.99 | one-time |


## Frequently asked questions

### Is 棋譜ドリル free?

棋譜ドリル is free to download, with no in-app purchases.

### Is NBackCalc free?

NBackCalc is free to download, with in-app purchases available.

### Do 棋譜ドリル or NBackCalc have ads?

棋譜ドリル shows ads; NBackCalc does not.

### Which is updated more often, 棋譜ドリル or NBackCalc?

棋譜ドリル ships an update every 3 months, and NBackCalc every 2 days. Most recently, 棋譜ドリル was updated on October 5, 2026 and NBackCalc on October 17, 2026.

---

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