Comparison

RU eBook Store vs TwentyElement

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head

Learning first 20 elements

Free

📚 Education

No ratingsView app →

About

RU eBook Store

Organize and categorize your digital library, including books, magazines, and newspapers. Offers multiple display options and a realistic page-turning experience with zoom functionality for easy reading. Find titles quickly with search by name, author, or publisher.

Highlights

Categorize books, magazines, newspapers
Multiple display modes (cover, spine, detail)
Search by title, author, publisher
Realistic page-turning animation
Zoom functionality for content

Features

Read full description

โปรแกรม RU eBook Store ผู้ใช้สามารถจัดเก็บและจัดเรียงประเภทของหนังสือเพื่อง่ายต่อการใช้งาน เช่น หนังสือ; นิตยสาร; หนังสือพิมพ์; อัลบั้มภาพและแคตตาล็อก ผู้ใช้สามารถที่จะเลือกรูปแบบการแสดงได้หลากหลาย เช่น การแสดงแบบปก, การแสดงแบบสัน และการแสดงแบบรายละเอียด เพื่อง่ายต่อการเลือกหนังสือโปรแกรมมีฟังก์ชันการค้นหาชื่อหนังสือ , ชื่อผู้แต่ง และชื่อสำนักพิมพ์ รูปแบบการเปิดอ่านเป็นเหมือนการพลิกหน้าหนังสือจริง ผู้ใช้สามารถซูม-ย่อขยายเนื้อหาได้

About

TwentyElement

Features

Read full description

Master the First 20 Elements with Elemental Memory Trainer! Elevate your chemistry knowledge with our interactive learning app. Test and improve your understanding of the periodic table's first 20 elements through engaging memory challenges. Features include: Comprehensive testing across atomic number, mass number, symbols, and groups Detailed performance tracking with precise percentage-based progress Customizable test modes to target your learning needs Intuitive interface designed for students and chemistry enthusiasts Challenge yourself, track your progress, and become a periodic table pro! Perfect for students, educators, and science lovers looking to strengthen their elemental knowledge.

Screenshots

RU eBook Store1 screens

TwentyElement4 screens

Verdict

The call

The clearest difference is in-app purchases: RU eBook Store at none against TwentyElement's 1. RU eBook Store also leads on iOS requirement (6.0 vs 16.6). TwentyElement's advantage is update cadence (weekly vs every 4 months). On price, 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. TwentyElement sells 1 one-off in-app purchase. RU eBook Store asks for nothing beyond the download.

UpkeepUpdate frequency

RU eBook Store ships an update every 4 months, TwentyElement weekly. The most recent releases landed on October 11, 2026 and October 5, 2026 respectively.

Scorecard3 real differences · 5 level

RU eBook Store versus TwentyElement: the parameters behind the verdict, then further details
Parameter	RU eBook Store	TwentyElement
Price	Free	Free
Positive reviews	33.3% of reviews	—
Update frequency	Every 4 months	Weekly — better
Ads	No	No
In-app purchases	No — better	Yes
Monetization	Free	—
Devices	iPhone, iPad, iPod — better	iPhone, iPad
Requires iOS	6.0 — better	16.6
Further details — not scored
Size	29 MB	2 MB
Age rating	4+	4+
Developer	Openserve Co.,Ltd.	Jatuphol Jaturapat

In-app purchases

None

RU eBook Store

No in-app purchases

1 purchases

TwentyElement

One-time1

Unlock all features$0.99

Questions

Is RU eBook Store free?

RU eBook Store is free to download, with no in-app purchases.

Is TwentyElement free?

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

Do RU eBook Store or TwentyElement have ads?

Neither RU eBook Store nor TwentyElement shows ads.

Which is updated more often, RU eBook Store or TwentyElement?

RU eBook Store ships an update every 4 months, and TwentyElement weekly. Most recently, RU eBook Store was updated on October 11, 2026 and TwentyElement on October 5, 2026.