O3 Alarm vs GPS SMS Commands
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
O3 Alarm
This security system app provides 360° protection for homes and small businesses. It allows remote monitoring, control of sensors, and customizable alerts for intrusions, floods, smoke, or gas. Manage your system, set routines, and receive notifications for enhanced safety and convenience.
- 360° protection with up to 50 wireless sensors
- Intrusion, flood, smoke, and gas detection alerts
- Customizable entry and exit delays
- Adjustable siren duration and volume (up to 95 dB)
- Smartphone, remote control, and panel interaction
- RFID tag management and SMS notifications
- Supports multiple users and smartphones
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Another signature system design from award-winning Chuango Security Technology Corporation, the O3 comes with world-class aesthetics and German-style precision craftsmanship. Chuango O3 is your 21st century security guard in disguise, made for wireless DIY comfort and convenience, and is particularly suitable for residential and small commercial applications. All you need is a Chuango O3 set and a regular SIM card. What your wire-free Chuango O3 can do for your home or small shop/SOHO: [360° Protection] Ideal for DIY home/shop improvement projects, the O3 can accommodate up to 50 wireless sensors and accessories, which can be easily “mounted” on walls or door/window frames with double-sided stickers. You will be the first to know – via this App – upon detection of intrusion, flood, smoke or gas. [360° Convenience] You can set exit and entry delays as you wish, so you and your family can go out and come back home at your own pace, without having to fumble around in your pocket for your mobile phone or remote control, to arm or disarm your Chuango O3. Pre-set routines can be entered so that your O3 will automatically guard your small shop or welcome you home right on the dot. Specific delays for specific zones are also possible. [360° Deterrence] Siren duration and volume can be adjusted per your need, with the maximum volume at 95 decibels. [360° Interaction] You can manage and interact with your O3 on your smartphone App, via your remote control, or directly on the panel. It can also double as a house phone to make or receive calls. [360° Sweet Home] The RFID tags can be renamed at will, and when used to disarm your O3 system, you immediately get an SMS text notification of who just came home. Multiple users and smartphones can be enabled to control and interact with one single O3 system once paired. You can take turns watching over your property and loved ones back home. Download your free Chuango O3 App and activate your smart and secure home now!
GPS SMS Commands
Configure your GPS tracking device remotely using SMS messages. This app provides a comprehensive database of commands, allowing you to search by device model and easily send configurations. Persist your device information for quick access.
- Persist GPS devices
- Database of SMS commands
- Search commands by device model
- Easy SMS sending
- Remote configuration changes
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Easy remote solution for configuring your GPS tracking device. Access your GPS/GPRS tracking device with SMS messages communication. List of features • Persist your GPS devices • Complete database of SMS Commands • Search commands by device model • Easy send to device • Easy remote configuration changes
Screenshots
Verdict
The clearest difference is update cadence: O3 Alarm at every 7 months against GPS SMS Commands's every 47 months. O3 Alarm also leads on iOS requirement (7.0 vs 13.0). On price, review sentiment, ads and in-app purchases 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.
O3 Alarm ships an update every 7 months, GPS SMS Commands every 47 months. The most recent releases landed on October 24, 2026 and October 19, 2026 respectively.
| Parameter | O3 Alarm | GPS SMS Commands |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Positive reviews | 0.0% of reviews | 0.0% of reviews |
| Number of ratings | 1 — better | — |
| Update frequency | Every 7 months — better | Every 47 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 7.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 71 MB | 16 MB |
| Age rating | 4+ | 4+ |
| Developer | Chuango Security Technology Corporation | Dimitar Stefanovski |
Customer experience
O3 Alarm
GPS SMS Commands
In-app purchases
O3 Alarm
No in-app purchases
GPS SMS Commands
No in-app purchases
