# Symphony by WaterFurnace vs Control4

The clearest difference is rating: Control4 at 3.5 against Symphony by WaterFurnace's 2.2. Control4 also leads on update cadence (fortnightly vs every 3 months) and review sentiment (38% vs 16%). Symphony by WaterFurnace's advantage is iOS requirement (15.0 vs 18.0). On price, ratings volume, 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.

Control4 holds the better App Store score, 3.5 against 2.2. Both are backed by a comparable volume of ratings — 64 and 74 respectively. Written reviews point the same way: 16% of Symphony by WaterFurnace's written reviews are positive against 38% of Control4's.

Symphony by WaterFurnace ships an update every 3 months, Control4 fortnightly. Both last shipped on October 24, 2026.

## The numbers

| Metric | Symphony by WaterFurnace | Control4 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.2 (64 ratings)](https://appshunter.io/ios/app/symphony-by-waterfurnace/id940139734/reviews) | **[3.5 (74 ratings)](https://appshunter.io/ios/app/control4/id6618112371/reviews)** |
| Number of ratings | 64 | **74** |
| Positive reviews | 16.3% of reviews | **38.2% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Fortnightly** |
| Monetization | Free | Free |
| Size | 18 MB | 253 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [WaterFurnace International](https://appshunter.io/developer/940139733) | [Snap One, LLC](https://appshunter.io/developer/417819127) |

## What reviewers say

### Symphony by WaterFurnace

[App page](https://appshunter.io/ios/app/symphony-by-waterfurnace/id940139734)

Control your geothermal heating and cooling system remotely with this WiFi-enabled platform. Monitor system performance, adjust temperatures across multiple zones, and track energy usage from any device. Receive alerts and service reminders for proactive maintenance.

**Highlights:** Remote system control, Real-time system feedback, Multi-zone temperature control, Energy usage tracking, Equipment alerts and reminders, Cloud-based access

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

**In-app purchases:** none

**What reviewers like**

- 👍 Handles primary functions well
- 👍 Works well for control of the thermostat
- 👍 No delay when inputting a change of heat
- 👍 Works great for my Water Furnace

**What reviewers complain about**

- 🐛 Extremely basic and not useful
- 🐛 Frustrating, annoying, yet easily fixable
- 🐛 Glitchy and inconsistent performance
- 🐛 Unusable due to bugs
- 🐛 Terrible app

**Reported bugs**

- Cannot log in
- App crashes when attempting to set a schedule
- Struggles to connect reliably
- App crashes on new iOS versions (e.g., iOS 18)
- App will not load after iOS upgrade

**Requested features**

- Dark mode option
- More detailed metrics (loop temps, intake/supply temps)
- Ability to change humidity set point
- Remember user selections (username, password, cost per kWh)
- Consolidate data across multiple devices


### Control4

[App page](https://appshunter.io/ios/app/control4/id6618112371)

Manage your smart home devices like lighting, music, and security from a single, intuitive interface. Customize your home screen and create automated routines for seamless control. Integrates with Apple HomeKit for Siri voice commands.

**Highlights:** All-in-one home screen control, Customizable favorites and widgets, Automated routines and scenes, Multiroom entertainment management, Live camera views and security alerts, Apple HomeKit and Siri integration

**Features:** macOS Compatibility, Apple Wallet, Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Symphony by WaterFurnace free?

Symphony by WaterFurnace is free to download, with no in-app purchases.

### Is Control4 free?

Control4 is free to download, with no in-app purchases.

### Which has better reviews, Symphony by WaterFurnace or Control4?

Control4 is rated higher. Symphony by WaterFurnace averages 2.2 out of 5 from 64 ratings, while Control4 averages 3.5 from 74 ratings.

### Do Symphony by WaterFurnace or Control4 have ads?

Neither Symphony by WaterFurnace nor Control4 shows ads.

### Which is updated more often, Symphony by WaterFurnace or Control4?

Symphony by WaterFurnace ships an update every 3 months, and Control4 fortnightly. Most recently, Symphony by WaterFurnace was updated on October 24, 2026 and Control4 on October 24, 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.*