# Learning World Book 3 vs 2021年1級機械保全技能士学科過去問

The clearest difference is review sentiment: 2021年1級機械保全技能士学科過去問 at 33% against Learning World Book 3's 0%. 2021年1級機械保全技能士学科過去問 also leads on update cadence (every 2 months vs every 52 months) and price ($1.99 vs $2.99). Learning World Book 3's advantage is iOS requirement (11.0 vs 15.0). On ads, in-app purchases, monetization model and device support there is nothing between them.

Learning World Book 3 costs $2.99 and 2021年1級機械保全技能士学科過去問 $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Learning World Book 3 ships an update every 52 months, 2021年1級機械保全技能士学科過去問 every 2 months. The most recent releases landed on October 8, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | Learning World Book 3 | 2021年1級機械保全技能士学科過去問 |
| --- | --- | --- |
| Price | $2.99 | **$1.99** |
| Positive reviews | 0.0% of reviews | **33.3% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 52 months | **Every 2 months** |
| Monetization | Paid | Paid |
| Size | 76 MB | 7 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [APRICOT PUBLISHING CO., LTD.](https://appshunter.io/developer/1387800869) | [shinji ikeda](https://appshunter.io/developer/1615407188) |

## What reviewers say

### Learning World Book 3

[App page](https://appshunter.io/ios/app/learning-world-book-3/id1437608271)

This app offers English language learning content for elementary school students, focusing on grammar, vocabulary, and creative expression. It includes dialogues, songs, and chants to enhance listening skills and encourage practice.

**Highlights:** Grammar and vocabulary lessons, Creative expression activities, Listening skill enhancement, Dialogues, songs, and chants, Practice with repeat-pause tracks, Rhythm-based practice for chants

**Features:** macOS Compatibility

**In-app purchases:** none


### 2021年1級機械保全技能士学科過去問

[App page](https://appshunter.io/ios/app/20211/id1644890831)

This app provides practice questions for the 2021 Level 1 Mechanical Maintenance Engineer exam. It offers various study modes, including all questions, checked questions, and incorrect questions, with explanations to deepen understanding. Users can also set their exam date to track remaining days.

**Highlights:** Practice exam questions, Study modes (all, checked, incorrect), Detailed answer explanations, Exam date countdown, Offline study capability

**In-app purchases:** none


## Frequently asked questions

### Is Learning World Book 3 free?

Learning World Book 3 costs $2.99, with no in-app purchases.

### Is 2021年1級機械保全技能士学科過去問 free?

2021年1級機械保全技能士学科過去問 costs $1.99, with no in-app purchases.

### Do Learning World Book 3 or 2021年1級機械保全技能士学科過去問 have ads?

Neither Learning World Book 3 nor 2021年1級機械保全技能士学科過去問 shows ads.

### Which is updated more often, Learning World Book 3 or 2021年1級機械保全技能士学科過去問?

Learning World Book 3 ships an update every 52 months, and 2021年1級機械保全技能士学科過去問 every 2 months. Most recently, Learning World Book 3 was updated on October 8, 2026 and 2021年1級機械保全技能士学科過去問 on October 4, 2026.

---

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