密九通 vs DCast
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
密九通
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密九通是基于标识密码(SM9)技术对移动智能终端重要数据的传输、存储和分享进行加密保护。 实现了语音通话、通讯录、短信、照片、文件和即时通讯消息的加密保护。 防止攻击者利用系统漏洞、恶意监听、植入病毒木马等手段盗取敏感数据，保障移动智能终端数据安全。 为政府、金融、能源、军队、运营商和大型企业等行业提供移动智能终端数据的安全保障服务。
DCast
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DCast 重新定义智能手机与智能白板的交互方式，以无线多屏互动技术赋能高效协作，适用于课堂、会议室、创意工坊等多种场景。 1 一键投屏：手机画面、音视频实时同步至白板大屏，无需VGA/HDMI线，告别繁琐布线，3秒开启沉浸式共享体验。 2 双向交互：白板画面直传手机，指尖轻触即可反向操控白板！手机就是你的智能遥控器 3 文件推送：音乐、视频、图片、PPT/PDF文档……手机本地文件直达白板，会议教学从此告别U盘焦虑。
Screenshots
Verdict
The clearest difference is update cadence: DCast at every 4 months against 密九通's every 11 months. 密九通's advantage is iOS requirement (10.0 vs 14.2). 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.
密九通 ships an update every 11 months, DCast every 4 months. The most recent releases landed on August 31, 2026 and September 9, 2026 respectively.
| Parameter | 密九通 | DCast |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 11 months | Every 4 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 10.0 — better | 14.2 |
| Further details — not scored | ||
| Size | 91 MB | 57 MB |
| Age rating | 4+ | 4+ |
| Developer | ShenZhen AoLian Information Security Technology Co.,Ltd. | Zhejiang Dahua Vision Technology Co.,Ltd. |
In-app purchases
密九通
No in-app purchases
DCast
No in-app purchases
