GSM Alarm vs DCast
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
GSM Alarm
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This is a type of GSM alarm app,You can easy query your device status wherever and whenever your are,such as arm,disarm,for home arm and so on.Also you can receive cellphone message when there is any warning at you house...It's easy for use.
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: GSM Alarm at monthly against DCast's every 4 months. GSM Alarm also leads on iOS requirement (9.0 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.
GSM Alarm ships an update monthly, DCast every 4 months. The most recent releases landed on November 1, 2026 and October 30, 2026 respectively.
| Parameter | GSM Alarm | DCast |
|---|---|---|
| Price | Free | Free |
| Update frequency | Monthly — better | Every 4 months |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 9.0 — better | 14.2 |
| Further details — not scored | ||
| Size | 1 MB | 57 MB |
| Age rating | 4+ | 4+ |
| Developer | 亚钢 蔡 | Zhejiang Dahua Vision Technology Co.,Ltd. |
In-app purchases
GSM Alarm
No in-app purchases
DCast
No in-app purchases
