# Chaipang Subtraction vs Adaptus

The clearest difference is update cadence: Adaptus at every 5 days against Chaipang Subtraction's every 3 months. Chaipang Subtraction's advantage is device support (3 vs 1) and iOS requirement (13.0 vs 16.4). On price, ads and in-app purchases there is nothing between them.

Both are free to download. Chaipang Subtraction sells 1 one-off in-app purchase and Adaptus sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Chaipang Subtraction ships an update every 3 months, Adaptus every 5 days. The most recent releases landed on October 7, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Chaipang Subtraction | Adaptus |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (3 ratings)](https://appshunter.io/ios/app/adaptus-nclex-prep/id6779008984/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 5 days** |
| Monetization | — | Free with in-app purchases |
| Size | 136 MB | 56 MB |
| Requires iOS | **13.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 12+ |
| Developer | [Wecref Co., Ltd.](https://appshunter.io/developer/1570555584) | [Taisen Industries LLC](https://appshunter.io/developer/6779008986) |

## What reviewers say

### Chaipang Subtraction

[App page](https://appshunter.io/ios/app/chaipang-subtraction/id1614401871)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 차이팡 뺄셈 광고제거 | $2.99 | one-time |


### Adaptus

[App page](https://appshunter.io/ios/app/adaptus-nclex-prep/id6779008984)

Prepare for the NCLEX-RN exam with over 4,800 practice questions, NGN case studies, and an adaptive engine. Track your progress, review weak areas, and get a readiness gauge to forecast your likelihood of passing. Pay once for lifetime access.

**Highlights:** 4,800+ NCLEX-style questions with rationales, Next Generation NCLEX (NGN) case studies, Adaptive learning engine, Readiness gauge for pass prediction, Daily drills and focused study sessions, 3,500+ flashcards with spaced repetition, Weak-area review

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime Unlock | $54.99 | one-time |


## Frequently asked questions

### Is Chaipang Subtraction free?

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

### Is Adaptus free?

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

### Do Chaipang Subtraction or Adaptus have ads?

Neither Chaipang Subtraction nor Adaptus shows ads.

### Which is updated more often, Chaipang Subtraction or Adaptus?

Chaipang Subtraction ships an update every 3 months, and Adaptus every 5 days. Most recently, Chaipang Subtraction was updated on October 7, 2026 and Adaptus on October 14, 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.*