# Caldera® Spas vs ECHO Water

The clearest difference is rating: ECHO Water at 4.6 against Caldera® Spas's 2.6. ECHO Water also leads on update cadence (every 3 weeks vs every 3 months) and review sentiment (20% vs 0%). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ECHO Water holds the better App Store score, 4.6 against 2.6. That said, the two scores are not equally well evidenced: ECHO Water has 138 ratings behind it against 5, so its average is the more settled of the two. Written reviews point the same way: 0% of Caldera® Spas's written reviews are positive against 20% of ECHO Water's.

Caldera® Spas ships an update every 3 months, ECHO Water every 3 weeks. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Caldera® Spas | ECHO Water |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.6 (5 ratings)](https://appshunter.io/ios/app/caldera-spas/id6502303368/reviews) | **[4.6 (138 ratings)](https://appshunter.io/ios/app/echo-water/id6739596759/reviews)** |
| Number of ratings | 5 | **138** |
| Positive reviews | 0.0% of reviews | **20.3% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Monetization | Free | Free |
| Size | 48 MB | 49 MB |
| Requires iOS | 18.0 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [Watkins Manufacturing Corporation](https://appshunter.io/developer/662341471) | [Echo Water](https://appshunter.io/developer/1786253277) |

## What reviewers say

### Caldera® Spas

[App page](https://appshunter.io/ios/app/caldera-spas/id6502303368)

Remotely manage your spa's lighting, jets, and temperature. Monitor energy saving modes and cleaning cycles for an enhanced spa experience. Enjoy 24/7 AI support for peace of mind.

**Highlights:** Remote control of lighting, jets, and temperature, Manage Clean Cycle and Energy Saving Modes, Control FreshWater® IQ with dosing, 24/7 AI support, Monitor spa from anywhere

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

**In-app purchases:** none


### ECHO Water

[App page](https://appshunter.io/ios/app/echo-water/id6739596759)

This app provides a streamlined and dependable interface for operating your Echo Flask. It offers a simplified user experience for managing hydrogen water generation.

**Highlights:** Simplified operation, Reliable performance, Echo Flask management, Hydrogen water generation

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 🚀 Sleek and compact design
- 💡 Customizable color options

**What reviewers complain about**

- 🐛 Connectivity issues with app
- 🐛 Inaccurate water tracking
- 🐛 Firmware update problems
- 🔋 Unreliable battery life

**Reported bugs**

- App unable to sync with water bottle
- Inconsistent flask counting
- Bluetooth pairing problems

**Requested features**

- Ability to manually log water intake
- Scheduling options for hydrogen water
- Improved app performance and stability


## Frequently asked questions

### Is Caldera® Spas free?

Caldera® Spas is free to download, with no in-app purchases.

### Is ECHO Water free?

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

### Which has better reviews, Caldera® Spas or ECHO Water?

ECHO Water is rated higher. Caldera® Spas averages 2.6 out of 5 from 5 ratings, while ECHO Water averages 4.6 from 138 ratings.

### Do Caldera® Spas or ECHO Water have ads?

Neither Caldera® Spas nor ECHO Water shows ads.

### Which is updated more often, Caldera® Spas or ECHO Water?

Caldera® Spas ships an update every 3 months, and ECHO Water every 3 weeks. Most recently, Caldera® Spas was updated on October 25, 2026 and ECHO Water 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.*