Sunlighten vs Caldera® Spas
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Sunlighten
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.
- 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
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Take your wellness journey to the next level with the Sunlighten app, designed to enhance your Sunlighten sauna and Sunlighten RED Light Therapy Panel experience and optimize your well-being. Stay in control, feel your best, and enjoy the full potential of Sunlighten products. Key Features: • Science-based wellness programs designed to help you reach your health goals. • Create your own personalized programs. • Real-time session tracking. • Schedule your sauna sessions to build a routine. • Remote sauna control for compatible connected saunas • Manage your sauna's audio and lighting settings. • Get the most of our your RED Light Therapy Panel with over 20 scientifically optimized programs and guidance from the leaders in light therapy. Owners of mPulse saunas and RED Light Therapy Panels can enjoy full access to all app features, while owners of Amplify, Signature, and Solo Rise models can take advantage of convenient audio control. Stay connected for exciting updates as we continue to enhance your Sunlighten experience!
Caldera® Spas
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.
- 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
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Introducing the Reimagined Caldera® Spas App Control & Monitor Your Spa from Anywhere Whether you’re home or away, the reimagined Caldera® Spas app keeps you connected to your spa. Designed to enhance your FreshWater® IQ experience, the new Caldera Spas app takes smart, intuitive spa ownership to the next level. With the app, you can: • Control lighting, jets, and temperature • Manage Clean Cycle and Energy Saving Modes • Control FreshWater® IQ with dosing • 24/7 AI support at your fingertips Whether you’re home or away, peace of mind is always within reach. The Caldera Spas app is powered by the newly released Connected Spa Kit 2, a dealer-installed option available on all Utopia® and Paradise® Series spas from 2024 onward, and Vacanza® Series spas from 2025 onward. Connected Spa Kit 2 delivers enhanced functionality and improved usability compared to the original Connected Spa Kit, which operates with the Caldera Spas Legacy app.
Screenshots
Verdict
Sunlighten and Caldera® Spas both sit at 2.7 stars, but that hides the real split: 20% of Sunlighten's written reviews are positive against 0% of Caldera® Spas's. Sunlighten also leads on ratings volume (85 vs 5) and iOS requirement (15.1 vs 18.0). On price, rating, update cadence and ads there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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 — 2.7 for Sunlighten against 2.6 for Caldera® Spas. That said, the two scores are not equally well evidenced: Sunlighten has 85 ratings behind it against 5, so its average is the more settled of the two. Written reviews are what separate them: 20% of Sunlighten's written reviews are positive against 0% of Caldera® Spas's.
Sunlighten ships an update every 4 months, Caldera® Spas every 3 months. The most recent releases landed on October 23, 2026 and October 25, 2026 respectively.
| Parameter | Sunlighten | Caldera® Spas |
|---|---|---|
| Price | Free | Free |
| Rating | 2.7 (85 ratings) — better | 2.6 (5 ratings) |
| Positive reviews | 19.8% of reviews — better | 0.0% of reviews |
| Number of ratings | 85 — better | 5 |
| Update frequency | Every 4 months | Every 3 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.1 — better | 18.0 |
| Further details — not scored | ||
| Size | 53 MB | 48 MB |
| Age rating | 17+ | 17+ |
| Developer | Sunlighten Inc | Watkins Manufacturing Corporation |
Customer experience
Sunlighten
Caldera® Spas
Bugs and requests
Sunlighten
Reported bugs
4 issues- App fails to connect to sauna
- Scheduled programs not running as expected
- Inconsistent lighting controls
- Tablet frequently restarts or loses connection
Requested features
4 requests- Remote start and preheat capability
- Improved app stability and reliability
- Better integration between app and sauna
- More customization options
Caldera® Spas
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Sunlighten
No in-app purchases
Caldera® Spas
No in-app purchases









