e vs RainbowOne
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
e
This app provides a unified interface for accessing educational resources and managing classroom activities. Teachers can oversee student access to digital textbooks and system functions, while students can view homework records. It enhances teacher-student interaction with messaging and student list features.
- Unified interface for teaching resources
- Classroom management for teachers
- Student homework record overview
- Teacher messaging for interaction
- Digital textbook reader
- Optimized content interface
Read full descriptionHide full description
e-Smart 2.0 version 1.0 1. 一站式介面，方便用戶快捷開啓各科教學資源 2. 課堂管理功能提升，老師可全面管理學生打開電子課本及系統 3. 新增老師概覽及學生手冊，用戶可一覽各系統的功課記錄 4. 新增老師訊息、查看學生名單，增進師生互動 EPH Reader version 5.0： 1. 新電子書目錄介面，整合電子課本的書目顯示 2. 優化內容介面，避免書頁內容與工具列重疊 3. 新增使用提示，插入資源時顯示提示句，使用時更清晰
RainbowOne
Create and deliver interactive e-learning materials with a powerful e-book editor. Engage students through cross-platform lessons, auto-corrected exercises, and instant learning data analysis. Share and discover educational content in a dedicated bookstore.
- Innovative e-book editor with 80+ tools
- Cross-platform interactive lessons
- Auto-corrected exercises
- Instant learning data analysis
- Bookstore for sharing and editing e-books
- Class management tools
Read full descriptionHide full description
Your e-books, your pedagogy. Cater your student's need. RainbowOne lets you create your own e-Learning materials and hold a truly interactive and engaging e-lesson. E-books can be easily created and adjusted freely to suit your needs. Our interactive e-lesson equipped with functions which helps you to save time. Exercises can be auto-corrected, and the learning data are analyzed to let you know more about your students’ ability. And the most important is, it is fun! Innovative e-Book Editor: Total Design Freedom We offer 80+ comprehensive tool and 10000+ images for you to tailor-make your e-books. You can start with a free canvas or choose from our templates. With easy drag and drop you can customize anything. Cross-platform lesson: Interact with your students Lesson can be held in a cross-platform environment. You can group your students and hold a competition, voting or discussion. We also provide page-sync, black-out screen and other functions that helps you manage your class. Instant Charts: Know your students well All questions with pre-set answers are instantly corrected. Learning data are automatically collected and analyzed. You can easily find out the learning difficulties of your students. Bookstore with editable e-books Share your knowledge! Here we have a bookstore for you to share your materials in public, and you can read the e-books from the bookstore to get some inspiration, or even download and edit it to suit your needs.
Screenshots
Verdict
e and RainbowOne both sit at 4.0 stars, but that hides the real split: 100% of RainbowOne's written reviews are positive against 22% of e's. RainbowOne also leads on device support (3 vs 1) and iOS requirement (12.0 vs 15.6). e's advantage is in-app purchases (none vs 6). On price, rating, ratings volume and update cadence 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. RainbowOne sells 6 one-off in-app purchases. e asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 4.0 for e against 4.0 for RainbowOne. Both are backed by a comparable volume of ratings — 2 and 2 respectively. Written reviews are what separate them: 22% of e's written reviews are positive against 100% of RainbowOne's.
Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on October 5, 2026 and October 10, 2026 respectively.
| Parameter | e | RainbowOne |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (2 ratings) | 4.0 (2 ratings) |
| Positive reviews | 22.2% of reviews | 100.0% of reviews — better |
| Number of ratings | 2 | 2 |
| Update frequency | Every 2 months | Every 2 months |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPad | iPhone, iPad, iPod — better |
| Requires iOS | 15.6 | 12.0 — better |
| Further details — not scored | ||
| Size | 75 MB | 287 MB |
| Age rating | 4+ | 4+ |
| Developer | POPULAR E-LEARNING (H.K.) LIMITED | Open Knowledge Association Ltd. |
Customer experience
e
RainbowOne
In-app purchases
e
No in-app purchases
RainbowOne
- 8個金幣$0.99
- 48個金幣$5.99
- 98個金幣$12.99
Show 3 moreShow fewer
- 218個金幣$27.99
- 368個金幣$46.99
- 688個金幣$89.99
