# Sunlighten vs ECHO Water

The clearest difference is update cadence: ECHO Water at every 3 weeks against Sunlighten's every 4 months. On price, rating, review sentiment and ratings volume 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 — 2.8 for Sunlighten against 2.7 for ECHO Water. Both are backed by a comparable volume of ratings — 77 and 52 respectively. Written reviews are what separate them: 19% of Sunlighten's written reviews are positive against 20% of ECHO Water's.

Sunlighten ships an update every 4 months, ECHO Water every 3 weeks. The most recent releases landed on September 7, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | Sunlighten | ECHO Water |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.8 (77 ratings)](https://appshunter.io/ios/app/sunlighten/id1634410434/reviews)** | [2.7 (52 ratings)](https://appshunter.io/ios/app/echo-water/id6739596759/reviews) |
| Number of ratings | **77** | 52 |
| Positive reviews | 19.0% of reviews | **20.3% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 weeks** |
| Monetization | Free | Free |
| Size | 53 MB | 49 MB |
| Requires iOS | 15.1 | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Sunlighten Inc](https://appshunter.io/developer/1634410436) | [Echo Water](https://appshunter.io/developer/1786253277) |

## What reviewers say

### Sunlighten

[App page](https://appshunter.io/ios/app/sunlighten/id1634410434)

Optimize your well-being with this app, designed to enhance your light therapy and sauna experiences. Create personalized wellness programs, track sessions in real-time, and control your devices remotely for a seamless health journey.

**Highlights:** Science-based wellness programs, Personalized program creation, Real-time session tracking, Remote sauna control (Wi-Fi), Audio and lighting management, Red light therapy panel programs

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

**In-app purchases:** none

**What reviewers like**

- 🚀 Convenient remote control
- 👍 Customizable programs
- 🚀 Easy to use app
- 👍 Enhances sauna experience

**What reviewers complain about**

- 🐛 Unreliable app connectivity
- 🔒 Privacy concerns with data collection
- 🐛 Inconsistent scheduling and remote start
- 🐛 Buggy and glitchy app
- 👎 Limited remote functionality

**Reported bugs**

- App fails to connect to sauna
- Scheduled programs not running as expected
- Inconsistent lighting controls
- Tablet frequently restarts or loses connection

**Requested features**

- Remote start and preheat capability
- Improved app stability and reliability
- Better integration between app and sauna
- More customization options


### 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 Sunlighten free?

Sunlighten 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, Sunlighten or ECHO Water?

Sunlighten is rated higher. Sunlighten averages 2.8 out of 5 from 77 ratings, while ECHO Water averages 2.7 from 52 ratings.

### Do Sunlighten or ECHO Water have ads?

Neither Sunlighten nor ECHO Water shows ads.

### Which is updated more often, Sunlighten or ECHO Water?

Sunlighten ships an update every 4 months, and ECHO Water every 3 weeks. Most recently, Sunlighten was updated on September 7, 2026 and ECHO Water on September 21, 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.*