UNION ARENA Tutorial App vs ONE PIECE BASE(EN)
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
UNION ARENA Tutorial App
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.
- Learn basic rules
- Tutorial Mode
- Free Battle Mode
- Practice with decks
- Experience trading card game
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Let’s learn how to play UNION ARENA! A tutorial app that lets you experience the brand-new trading card game " UNION ARENA" is now available! •Learn how to play UNION ARENA English version! First use the "Tutorial Mode" to learn and get used to the basic rules of the game, and then start playing freely in the "Free Battle Mode"! You can use the HUNTER×HUNTER deck to learn the rules and enjoy battling! In "Free Battle Mode",You can use the BLEACH: Thousand-Year Blood War, JUJUTSU KAISEN, CODE GEASS: Lelouch of the Rebellion, and SOLO LEVELING decks as well. Experience the excitement of Union Arena with the Tutorial App!
ONE PIECE BASE(EN)
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.
- Read entire One Piece manga
- Video story summaries
- One Piece-style portrait generator
- Create custom wanted posters
- Pick up where you left off
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Read One Piece anytime, anywhere! Start reading from the beginning, pick up where you left off, or revisit your favorite parts! This is the new manga app exclusively for One Piece! ■Relive One Piece with ONE PIECE BASE! This app contains the entire One Piece adventure so far — a story spanning over 1,000 chapters! Reread any of your favorite moments anytime, anywhere! ■Learn More About the Story Through ONE PIECE BASE! Watch video summaries that help you understand and follow along with each saga! Dive deeper into the story! ■One Piece Portrait Generator! Ever wanted an Eiichiro Oda-style illustration of yourself?! Check out the One Piece Portrait Generator only available on ONE PIECE BASE! Convert photos of you or your friends into One Piece-style portraits and create your very own wanted posters! Bandai Namco Entertainment Inc. Website: https://bandainamcoent.co.jp/english/ By downloading or installing this app, you agree to the Bandai Namco Entertainment Terms of Service. Terms of Service: https://legal.bandainamcoent.co.jp/terms/ Privacy Policy: https://legal.bandainamcoent.co.jp/privacy/ Note: This game contains some items available for in-app purchase that can enhance gameplay and speed up your progress. In-app purchases can be disabled in your device settings, see https://support.apple.com/en-us/HT201304 for more details. This application is distributed under the official rights from the license holder.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | UNION ARENA Tutorial App | ONE PIECE BASE(EN) |
|---|---|---|
| Price | Free | Free |
| Rating | 4.4 (32 ratings) — better | 3.6 (37 ratings) |
| Positive reviews | 90.9% of reviews — better | 35.7% of reviews |
| Number of ratings | 32 | 37 — better |
| Update frequency | Every 3 months | Every 5 weeks — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 11.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 216 MB | 146 MB |
| Age rating | 4+ | 12+ |
| Developer | BANDAI Co., Ltd. | Bandai Namco Entertainment Inc. |
Customer experience
UNION ARENA Tutorial App
ONE PIECE BASE(EN)
Bugs and requests
UNION ARENA Tutorial App
Not enough reviews yet to summarise bugs or requests.
ONE PIECE BASE(EN)
Reported bugs
2 issues- Laggy and buggy performance
- Compatibility issues with older devices
Requested features
3 requests- Make manga chapters free to read
- Add more interactive and creative content
- Improve overall app quality and performance
In-app purchases
UNION ARENA Tutorial App
No in-app purchases
ONE PIECE BASE(EN)
- Conversion_ticketA$2.99
- Conversion_ticketB$5.99
- BerryA$6.99
Show 3 moreShow fewer
- Conversion_ticketC$8.99
- BerryB$13.99
- BerryC$40.99
Questions
Is UNION ARENA Tutorial App free?
Is ONE PIECE BASE(EN) free?
Which has better reviews, UNION ARENA Tutorial App or ONE PIECE BASE(EN)?
Do UNION ARENA Tutorial App or ONE PIECE BASE(EN) have ads?
Which is updated more often, UNION ARENA Tutorial App or ONE PIECE BASE(EN)?
Other comparisons
