# RainbowStar vs 溝通易 3.0

The clearest difference is in-app purchases: 溝通易 3.0 at none against RainbowStar's 6. RainbowStar's advantage is update cadence (every 5 weeks vs every 3 months) and iOS requirement (12.0 vs 15.0). On price, ads and device support there is nothing between them.

Both are free to download. RainbowStar sells 6 one-off in-app purchases. 溝通易 3.0 asks for nothing beyond the download.

RainbowStar ships an update every 5 weeks, 溝通易 3.0 every 3 months. The most recent releases landed on October 11, 2026 and September 16, 2026 respectively.

## The numbers

| Metric | RainbowStar | 溝通易 3.0 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 50.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 3 months |
| Monetization | — | Free |
| Size | 287 MB | 209 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Open Knowledge Association Ltd.](https://appshunter.io/developer/868011308) | [Hong Chi Association](https://appshunter.io/developer/645391618) |

## What reviewers say

### RainbowStar

[App page](https://appshunter.io/ios/app/rainbowstar/id1251256553)

**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 |


### 溝通易 3.0

[App page](https://appshunter.io/ios/app/30/id1580493278)

This app assists individuals with low verbal abilities or who are non-native Cantonese speakers to communicate using text. It offers customizable communication cards with extensive image libraries, text-to-speech functionality, and a Cantonese Pinyin keyboard to facilitate online and offline interaction.

**Highlights:** Customizable communication files, Over 1500 image cards, Text-to-speech functionality, Cantonese Pinyin keyboard, Three training games, File sharing

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is RainbowStar free?

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

### Is 溝通易 3.0 free?

溝通易 3.0 is free to download, with no in-app purchases.

### Do RainbowStar or 溝通易 3.0 have ads?

Neither RainbowStar nor 溝通易 3.0 shows ads.

### Which is updated more often, RainbowStar or 溝通易 3.0?

RainbowStar ships an update every 5 weeks, and 溝通易 3.0 every 3 months. Most recently, RainbowStar was updated on October 11, 2026 and 溝通易 3.0 on September 16, 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.*