# Shiku IM vs RainbowChat

The clearest difference is update cadence: Shiku IM at every 3 weeks against RainbowChat's every 2 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Shiku IM ships an update every 3 weeks, RainbowChat every 2 months. The most recent releases landed on August 9, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | Shiku IM | RainbowChat |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/shiku-im/id1160132242/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 2 months |
| Monetization | Free | — |
| Size | 176 MB | 33 MB |
| Requires iOS | 13.0 | **12.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 17+ |
| Developer | [Shenzhen Shiku information technology co., LTD](https://appshunter.io/developer/474681307) | [顺 江](https://appshunter.io/developer/1423024211) |

## What reviewers say

### Shiku IM

[App page](https://appshunter.io/ios/app/shiku-im/id1160132242)

A secure and feature-rich instant messaging application designed for high concurrency and availability. It offers a comprehensive suite of communication tools, including text, voice, and video conferencing, with robust privacy features and private cloud support.

**Highlights:** High concurrency and availability, End-to-end encryption, Private cloud support, Voice and video conferencing, Burn after reading messages, Group chat up to 10,000 members, Shared desktop functionality

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

**In-app purchases:** none


### RainbowChat

[App page](https://appshunter.io/ios/app/rainbowchat/id1423024212)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Shiku IM free?

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

### Is RainbowChat free?

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

### Do Shiku IM or RainbowChat have ads?

Neither Shiku IM nor RainbowChat shows ads.

### Which is updated more often, Shiku IM or RainbowChat?

Shiku IM ships an update every 3 weeks, and RainbowChat every 2 months. Most recently, Shiku IM was updated on August 9, 2026 and RainbowChat on September 14, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*