# QuietCool Smart Control vs Optimal°

The clearest difference is ratings volume: QuietCool Smart Control at 15K against Optimal°'s 7. QuietCool Smart Control also leads on update cadence (every 2 months vs every 5 months) and iOS requirement (13.0 vs 15.1). Optimal°'s advantage is review sentiment (60% vs 39%). 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.

Optimal° holds the better App Store score, 4.9 against 4.7. That said, the two scores are not equally well evidenced: QuietCool Smart Control has 15K ratings behind it against 7, so its average is the more settled of the two. Written reviews point the same way: 39% of QuietCool Smart Control's written reviews are positive against 60% of Optimal°'s.

QuietCool Smart Control ships an update every 2 months, Optimal° every 5 months. The most recent releases landed on October 15, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | QuietCool Smart Control | Optimal° |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (15K ratings)](https://appshunter.io/ios/app/quietcool-smart-control/id1481132594/reviews) | **[4.9 (7 ratings)](https://appshunter.io/ios/app/optimal/id6473653236/reviews)** |
| Number of ratings | **15K** | 7 |
| Positive reviews | 38.7% of reviews | **60.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 5 months |
| Monetization | Free | Free |
| Size | 145 MB | 19 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [QC Manufacturing, Inc](https://appshunter.io/developer/1210475874) | [Its Optimal LLC](https://appshunter.io/developer/1719356914) |

## What reviewers say

### QuietCool Smart Control

[App page](https://appshunter.io/ios/app/quietcool-smart-control/id1481132594)

Manage your QuietCool attic fans remotely. Adjust fan speed, set run times, and monitor attic temperature and humidity. Utilize Smart Mode for automated adjustments and create custom presets for effortless control. View detailed analytics on fan performance and environmental conditions.

**Highlights:** Control fan speed, Set fan run times, View temperature and humidity, Enable Smart Mode, Add custom presets, View analytics

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

**In-app purchases:** none

**What reviewers like**

- 🚀 Works smoothly and reliably
- 👍 User-friendly and intuitive interface
- 🚀 Easy setup and installation
- 👍 No account required
- 🚀 Impressive Bluetooth range

**What reviewers complain about**

- 🐛 Connectivity issues after app updates
- 🔒 Limited remote access (Bluetooth-only)
- 🐛 Pairing issues with multiple devices
- 🐛 Bugs with smart mode and temperature settings
- 🐛 Unreliable WiFi connectivity

**Reported bugs**

- Firmware updates breaking existing functionality
- Inconsistent behavior with temperature and humidity settings
- Inability to stay connected after pairing a new device
- App failing to recognize the fan after updates

**Requested features**

- Add 'Quiet' mode to turn off fan during specified hours
- Integrate with weather data or allow time-of-day control
- Provide temperature/humidity history and trending
- Enable remote monitoring and control via WiFi or internet
- Allow multiple users to control the same fan


### 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


## Frequently asked questions

### Is QuietCool Smart Control free?

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

### Is Optimal° free?

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

### Which has better reviews, QuietCool Smart Control or Optimal°?

Optimal° is rated higher. QuietCool Smart Control averages 4.7 out of 5 from 15K ratings, while Optimal° averages 4.9 from 7 ratings.

### Do QuietCool Smart Control or Optimal° have ads?

Neither QuietCool Smart Control nor Optimal° shows ads.

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

QuietCool Smart Control ships an update every 2 months, and Optimal° every 5 months. Most recently, QuietCool Smart Control was updated on October 15, 2026 and Optimal° on September 29, 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.*