# 레슨북 vs SPAC^

The clearest difference is review sentiment: 레슨북 at 94% against SPAC^'s 45%. 레슨북 also leads on update cadence (every 11 days vs every 3 weeks). SPAC^'s advantage is iOS requirement (13.0 vs 17.0). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

레슨북 ships an update every 11 days, SPAC^ every 3 weeks. The most recent releases landed on November 6, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | 레슨북 | SPAC^ |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (3 ratings)](https://appshunter.io/ios/app/id1071745813/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | **94.3% of reviews** | 44.8% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 11 days** | Every 3 weeks |
| Monetization | Free | Free |
| Size | 42 MB | 1 MB |
| Requires iOS | 17.0 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [제이쓰리랩(주)](https://appshunter.io/developer/1780749019) | [CARROT GLOBAL Inc.](https://appshunter.io/developer/994380313) |

## What reviewers say

### 레슨북

[App page](https://appshunter.io/ios/app/id1071745813)

This app helps manage lessons for various activities like golf, Pilates, and tutoring. It offers features for members to book and cancel lessons, instructors to manage schedules and promotions, and centers to oversee operations, member status, and staff.

**Highlights:** Member lesson booking and cancellation, Instructor schedule management and promotion, Center operations and member status tracking, Automated lesson count and duration tracking, Integrated personal and lesson schedule management, Easy payment for lesson passes, Staff scheduling and member assignment

**Features:** macOS Compatibility

**In-app purchases:** none


### SPAC^

[App page](https://appshunter.io/ios/app/spac/id1225076497)

This app evaluates speaking abilities by assessing pronunciation, vocabulary, sentence construction, and logical thinking. The test is divided into six parts and takes approximately 15 minutes to complete, including volume and microphone checks.

**Highlights:** Pronunciation assessment, Vocabulary evaluation, Sentence construction analysis, Logical thinking assessment, 6-part speaking test, Volume control, Microphone check

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 레슨북 free?

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

### Is SPAC^ free?

SPAC^ is free to download, with no in-app purchases.

### Do 레슨북 or SPAC^ have ads?

Neither 레슨북 nor SPAC^ shows ads.

### Which is updated more often, 레슨북 or SPAC^?

레슨북 ships an update every 11 days, and SPAC^ every 3 weeks. Most recently, 레슨북 was updated on November 6, 2026 and SPAC^ on November 2, 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.*