# Pacy Skill Development vs Katsuyou Drill

The clearest difference is in-app purchases: Pacy Skill Development at none against Katsuyou Drill's 1. Pacy Skill Development also leads on ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. Katsuyou Drill sells 1 one-off in-app purchase. Pacy Skill Development asks for nothing beyond the download.

Pacy Skill Development ships an update fortnightly, Katsuyou Drill weekly. Both last shipped on October 19, 2026.

## The numbers

| Metric | Pacy Skill Development | Katsuyou Drill |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Fortnightly | **Weekly** |
| Size | 60 MB | 43 MB |
| Requires iOS | 15 | 15.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Pacy AB](https://appshunter.io/developer/1767581278) | [Ming Fang](https://appshunter.io/developer/1885120342) |

## What reviewers say

### Pacy Skill Development

[App page](https://appshunter.io/ios/app/pacy-skill-development/id6670788359)

**Features:** macOS Compatibility

**In-app purchases:** none


### Katsuyou Drill

[App page](https://appshunter.io/ios/app/katsuyou-drill/id6769468622)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Katsuyou Drill Premium (Lifetime) | $1.99 | one-time |


## Frequently asked questions

### Is Pacy Skill Development free?

Pacy Skill Development is free to download, with no in-app purchases.

### Is Katsuyou Drill free?

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

### Do Pacy Skill Development or Katsuyou Drill have ads?

Katsuyou Drill shows ads; Pacy Skill Development does not.

### Which is updated more often, Pacy Skill Development or Katsuyou Drill?

Pacy Skill Development ships an update fortnightly, and Katsuyou Drill weekly. Most recently, Pacy Skill Development was updated on October 19, 2026 and Katsuyou Drill on October 19, 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.*