# e vs RainbowOne

The clearest difference is in-app purchases: e at none against RainbowOne's 6. RainbowOne's advantage is device support (3 vs 1) and iOS requirement (12.0 vs 15.6). On price, rating, ratings volume and update cadence there is nothing between them.

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.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on August 17, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | e | RainbowOne |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (2 ratings)](https://appshunter.io/ios/app/e-smart20/id833357108/reviews) | [4.0 (2 ratings)](https://appshunter.io/ios/app/rainbowone/id1019429184/reviews) |
| Number of ratings | 2 | 2 |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 75 MB | 287 MB |
| Requires iOS | 15.6 | **12.0** |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [POPULAR E-LEARNING (H.K.) LIMITED](https://appshunter.io/developer/518263638) | [Open Knowledge Association Ltd.](https://appshunter.io/developer/868011308) |

## What reviewers say

### e

[App page](https://appshunter.io/ios/app/e-smart20/id833357108)

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.

**Highlights:** Unified interface for teaching resources, Classroom management for teachers, Student homework record overview, Teacher messaging for interaction, Digital textbook reader, Optimized content interface

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### RainbowOne

[App page](https://appshunter.io/ios/app/rainbowone/id1019429184)

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.

**Highlights:** 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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 8個金幣 | $0.99 | one-time |
| 48個金幣 | $5.99 | one-time |
| 98個金幣 | $12.99 | one-time |
| 218個金幣 | $27.99 | one-time |
| 368個金幣 | $46.99 | one-time |
| 688個金幣 | $89.99 | one-time |


## Frequently asked questions

### Is e free?

e is free to download, with no in-app purchases.

### Is RainbowOne free?

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

### Which has better reviews, e or RainbowOne?

e and RainbowOne are both rated 4.0 out of 5 on the App Store, from 2 and 2 ratings respectively.

### Do e or RainbowOne have ads?

Neither e nor RainbowOne shows ads.

### Which is updated more often, e or RainbowOne?

e ships an update every 2 months, and RainbowOne every 2 months. Most recently, e was updated on August 17, 2026 and RainbowOne on September 8, 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.*