# Optimal° vs Control 365

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.

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.

## The numbers

| Metric | Optimal° | Control 365 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.9 (7 ratings)](https://appshunter.io/ios/app/optimal/id6473653236/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/control-365/id6743322860/reviews)** |
| Number of ratings | **7** | 1 |
| Positive reviews | 60.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 months** | Every 14 months |
| Monetization | Free | Free |
| Size | 19 MB | 40 MB |
| Requires iOS | **15.1** | 16.4 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [Its Optimal LLC](https://appshunter.io/developer/1719356914) | [Eagle Mountain](https://appshunter.io/developer/1802219001) |

## What reviewers say

### Optimal°

[App page](https://appshunter.io/ios/app/optimal/id6473653236)

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.

**Highlights:** 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

**In-app purchases:** none


### Control 365

[App page](https://appshunter.io/ios/app/control-365/id6743322860)

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.

**Highlights:** Remote HVAC system control, Smart home management, Business system monitoring, Mobile access, Anytime, anywhere control

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Optimal° free?

Optimal° is free to download, with no in-app purchases.

### Is Control 365 free?

Control 365 is free to download, with no in-app purchases.

### Which has better reviews, Optimal° or Control 365?

Control 365 is rated higher. Optimal° averages 4.9 out of 5 from 7 ratings, while Control 365 averages 5.0 from 1 ratings.

### Do Optimal° or Control 365 have ads?

Neither Optimal° nor Control 365 shows ads.

### Which is updated more often, Optimal° or Control 365?

Optimal° ships an update every 5 months, and Control 365 every 14 months. Most recently, Optimal° was updated on September 29, 2026 and Control 365 on October 3, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*