Optimal° vs Control 365
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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
Control 365
Manage your smart home or business's hydronic HVAC systems remotely. Adjust settings and monitor your environment from your phone or tablet, offering convenience and control from any location.
- Remote HVAC system control
- Smart home management
- Business system monitoring
- Mobile access
- Anytime, anywhere control
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Control 365 puts complete control of your smart home or business in your hands. Control your systems from your phone or tablet, anywhere, anytime.
Screenshots
Verdict
The clearest difference is update cadence: Optimal° at every 5 months against Control 365's every 14 months. Optimal° also leads on ratings volume (7 vs 1). On price, rating, 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.
On the App Store both sit at effectively the same score — 4.9 for Optimal° against 5.0 for Control 365. That said, the two scores are not equally well evidenced: Optimal° has 7 ratings behind it against 1, so its average is the more settled of the two.
Optimal° ships an update every 5 months, Control 365 every 14 months. The most recent releases landed on September 29, 2026 and October 3, 2026 respectively.
| Parameter | Optimal° | Control 365 |
|---|---|---|
| Price | Free | Free |
| Rating | 4.9 (7 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 60.0% of reviews | — |
| Number of ratings | 7 — better | 1 |
| Update frequency | Every 5 months — better | Every 14 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 15.1 — better | 16.4 |
| Further details — not scored | ||
| Size | 19 MB | 40 MB |
| Age rating | 17+ | 4+ |
| Developer | Its Optimal LLC | Eagle Mountain |
Customer experience
Optimal°
Control 365
In-app purchases
Optimal°
No in-app purchases
Control 365
No in-app purchases
