RainbowChat vs RustFan
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
RainbowChat
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RainbowChat为自主知识产权的产品级即时通讯工程，可方便打算基于MobileIMSDK开发全功能IM的开发者，能站在既有的成果上直接2次开发，从而快速掌握自主开发全功能IM的能力、加快项目进度、同时降低项目开发的不可控风险。
RustFan
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A technical community built for Rust programming enthusiasts, dedicated to sharing knowledge, exchanging ideas, and helping developers grow.
Screenshots
Verdict
The clearest difference is update cadence: RustFan at every 10 days against RainbowChat's every 2 months. RainbowChat's advantage is iOS requirement (12.0 vs 15.1). On price, ads, in-app purchases 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
RainbowChat ships an update every 2 months, RustFan every 10 days. The most recent releases landed on October 2, 2026 and October 6, 2026 respectively.
| Parameter | RainbowChat | RustFan |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 months | Every 10 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 12.0 — better | 15.1 |
| Further details — not scored | ||
| Size | 33 MB | 41 MB |
| Age rating | 17+ | 17+ |
| Developer | 顺 江 | Jun Li |
In-app purchases
RainbowChat
No in-app purchases
RustFan
No in-app purchases
