# Subtraction Skill Builders vs PaKO A1

The clearest difference is price: PaKO A1 at Free against Subtraction Skill Builders's $2.99. PaKO A1 also leads on update cadence (monthly vs every 28 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

PaKO A1 is free to download; Subtraction Skill Builders costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Subtraction Skill Builders ships an update every 28 months, PaKO A1 monthly. The most recent releases landed on October 24, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Subtraction Skill Builders | PaKO A1 |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 28 months | **Monthly** |
| Monetization | — | Free |
| Size | 18 MB | 32 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Sergey Malugin](https://appshunter.io/developer/562782409) | [Corpora Inc](https://appshunter.io/developer/1808739895) |

## What reviewers say

### Subtraction Skill Builders

[App page](https://appshunter.io/ios/app/subtraction-skill-builders/id1271517241)

**Features:** macOS Compatibility

**In-app purchases:** none


### PaKO A1

[App page](https://appshunter.io/ios/app/pako-a1/id6745461113)

Master A1-level Korean or English with focused, offline drills. This app provides one sentence at a time with high-quality text-to-speech, ensuring a distraction-free learning experience. It prioritizes privacy with no network required and no user accounts.

**Highlights:** A1-level sentence sets, Dual Korean/English TTS voices, Minimalist, one-sentence interface, Offline and private by design, No ads or in-app purchases, Focused, frictionless drills

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Subtraction Skill Builders free?

Subtraction Skill Builders costs $2.99, with no in-app purchases.

### Is PaKO A1 free?

PaKO A1 is free to download, with no in-app purchases.

### Do Subtraction Skill Builders or PaKO A1 have ads?

Neither Subtraction Skill Builders nor PaKO A1 shows ads.

### Which is updated more often, Subtraction Skill Builders or PaKO A1?

Subtraction Skill Builders ships an update every 28 months, and PaKO A1 monthly. Most recently, Subtraction Skill Builders was updated on October 24, 2026 and PaKO A1 on October 9, 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.*