X vs Optimal°
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
X
Easily connect and manage smart home security devices. Receive instant alerts for potential dangers and remotely monitor your home's status from anywhere. Share device access with family for collective peace of mind.
- Remote device setup and testing
- Real-time push notifications for alerts
- Share device access with family
- 24/7 fire dispatch (Protect+ Plan)
- Monitor home status remotely
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X-Sense Home Security makes connecting all smart devices in your house a breeze, allowing you to check your home's status at any time, no matter where you are. You can remotely set up and test devices to ensure they are working properly. In case of danger, the app will send you push notifications, enabling you to react quickly. You can also share smart devices with your family members, making it possible for them to keep an eye on your home's security as well. Meanwhile, our Protect+ Plan is available in the United States. It provides 24/7 fire dispatch to fully protect your life, family, and property. Learn more about Protect+ Plan in the app.
Optimal°
This app provides remote control and monitoring for a specific brand of tankless water heaters. Users can adjust temperature, track performance metrics, and receive diagnostic information for efficient hot water management.
- Set water heater output temperature
- Monitor unit activity state
- Track flow rate and energy consumption
- View inlet and outlet water temperatures
- Access diagnostics and error codes
- Enable Vacation Mode
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Control and Monitor your Optimal Opti Tankless Water Heater with the Optimal° connected app. Optimal° app allows you to control temperature, monitor performance and unit diagnostics, giving you full control of our hot water services. Optimal's patent pending ultrasonic flow sensors allow you to add your water heater to your smart home intelligence. Optimal° allows you to precisely customize how hot water is delivered to your faucets. Save money, be efficient and that's Optimal. Current App Version functionality. - Set water heater output temperature - Unit activity state (heating / not heating) - Gallons / min flow rate - Kilowatts per hour rate - Inlet Water Temperature - Outlet Water Temperature - Input Voltage - Available Flow Rate - Heater Capacity - Vacation Mode - Diagnostics / Error Code Reporting
Screenshots
Verdict
The clearest difference is rating: X at 4.8 against Optimal°'s 3.9. X also leads on review sentiment (91% vs 60%) and ratings volume (3.5K vs 9). On price, ads, in-app purchases and monetization model 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.
X holds the better App Store score, 4.8 against 3.9. That said, the two scores are not equally well evidenced: X has 3.5K ratings behind it against 9, so its average is the more settled of the two. Written reviews point the same way: 91% of X's written reviews are positive against 60% of Optimal°'s.
X ships an update monthly, Optimal° every 5 months. The most recent releases landed on November 1, 2026 and October 24, 2026 respectively.
| Parameter | X | Optimal° |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (3.5K ratings) — better | 3.9 (9 ratings) |
| Positive reviews | 91.0% of reviews — better | 60.0% of reviews |
| Number of ratings | 3.5K — better | 9 |
| Update frequency | Monthly — better | Every 5 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 13.0 — better | 15.1 |
| Further details — not scored | ||
| Size | 333 MB | 19 MB |
| Age rating | 12+ | 17+ |
| Developer | X-sense USA LLC | Its Optimal LLC |
Customer experience
X
Optimal°
Bugs and requests
X
Reported bugs
3 issues- Devices going offline unexpectedly
- Firmware update failures
- Inconsistent sensor behavior
Requested features
5 requests- Ability to test alarms from app
- Option to silence alarms remotely
- Support for multiple user logins
- Customizable notification tones
- Expanded location management
Optimal°
Not enough reviews yet to summarise bugs or requests.
In-app purchases
X
No in-app purchases
Optimal°
No in-app purchases
