# UNION ARENA Tutorial App vs ONE PIECE BASE(EN)

The clearest difference is review sentiment: UNION ARENA Tutorial App at 91% against ONE PIECE BASE(EN)'s 36%. UNION ARENA Tutorial App also leads on rating (4.4 vs 3.6) and in-app purchases (none vs 6). ONE PIECE BASE(EN)'s advantage is update cadence (every 5 weeks vs every 3 months). On price, ratings volume, ads and device support there is nothing between them.

Both are free to download. ONE PIECE BASE(EN) sells 6 one-off in-app purchases. UNION ARENA Tutorial App asks for nothing beyond the download.

UNION ARENA Tutorial App holds the better App Store score, 4.4 against 3.6. Both are backed by a comparable volume of ratings — 32 and 37 respectively. Written reviews point the same way: 91% of UNION ARENA Tutorial App's written reviews are positive against 36% of ONE PIECE BASE(EN)'s.

UNION ARENA Tutorial App ships an update every 3 months, ONE PIECE BASE(EN) every 5 weeks. The most recent releases landed on September 19, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | UNION ARENA Tutorial App | ONE PIECE BASE(EN) |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (32 ratings)](https://appshunter.io/ios/app/union-arena-tutorial-app/id6578425605/reviews)** | [3.6 (37 ratings)](https://appshunter.io/ios/app/one-piece-baseen/id6739035554/reviews) |
| Number of ratings | 32 | **37** |
| Positive reviews | **90.9% of reviews** | 35.7% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 5 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 216 MB | 146 MB |
| Requires iOS | **11.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [BANDAI Co., Ltd.](https://appshunter.io/developer/359834423) | [Bandai Namco Entertainment Inc.](https://appshunter.io/developer/352305770) |

## What reviewers say

### UNION ARENA Tutorial App

[App page](https://appshunter.io/ios/app/union-arena-tutorial-app/id6578425605)

Learn the rules and strategies of a new trading card game. This app offers tutorial modes to grasp basic gameplay and free battle modes to practice with different decks. Experience the excitement of the game with guided learning.

**Highlights:** Learn basic rules, Tutorial Mode, Free Battle Mode, Practice with decks, Experience trading card game

**In-app purchases:** none


### ONE PIECE BASE(EN)

[App page](https://appshunter.io/ios/app/one-piece-baseen/id6739035554)

Dive into the complete One Piece manga, read from the start, or jump to your favorite arcs. Enhance your understanding with video summaries and create custom wanted posters with an exclusive portrait generator.

**Highlights:** Read entire One Piece manga, Video story summaries, One Piece-style portrait generator, Create custom wanted posters, Pick up where you left off

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Conversion_ticketA | $2.99 | one-time |
| Conversion_ticketB | $5.99 | one-time |
| BerryA | $6.99 | one-time |
| Conversion_ticketC | $8.99 | one-time |
| BerryB | $13.99 | one-time |
| BerryC | $40.99 | one-time |

**What reviewers like**

- 👍 Great app for reading One Piece manga
- 💡 Immersive and convenient experience
- 🎨 Fun wanted poster generator

**What reviewers complain about**

- 💰 Expensive, with many paid features
- 📚 Subpar manga quality and selection
- 🤖 AI-generated content can be low quality

**Reported bugs**

- Laggy and buggy performance
- Compatibility issues with older devices

**Requested features**

- Make manga chapters free to read
- Add more interactive and creative content
- Improve overall app quality and performance


## Frequently asked questions

### Is UNION ARENA Tutorial App free?

UNION ARENA Tutorial App is free to download, with no in-app purchases.

### Is ONE PIECE BASE(EN) free?

ONE PIECE BASE(EN) is free to download, with in-app purchases available.

### Which has better reviews, UNION ARENA Tutorial App or ONE PIECE BASE(EN)?

UNION ARENA Tutorial App is rated higher. UNION ARENA Tutorial App averages 4.4 out of 5 from 32 ratings, while ONE PIECE BASE(EN) averages 3.6 from 37 ratings.

### Do UNION ARENA Tutorial App or ONE PIECE BASE(EN) have ads?

Neither UNION ARENA Tutorial App nor ONE PIECE BASE(EN) shows ads.

### Which is updated more often, UNION ARENA Tutorial App or ONE PIECE BASE(EN)?

UNION ARENA Tutorial App ships an update every 3 months, and ONE PIECE BASE(EN) every 5 weeks. Most recently, UNION ARENA Tutorial App was updated on September 19, 2026 and ONE PIECE BASE(EN) on September 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.*