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Chargerless Ray
A 7 g solar-powered wellness tracker with no charging port or subscription. Track sleep, heart rate, HRV, temperature and steps.
wearablesolar-poweredwellnesssleep trackingheart rateHRVsubscription-freehardware
A
Editor's Take
Curated by Startup List teamChargerless Ray is a 7 g solar-powered wellness tracker designed for continuous wear. It tracks sleep, heart rate, heart-rate variability, temperature, steps, activity and light without a charging port or subscription. Ray works with iPhone and Android.
About one minute of direct outdoor sunlight per day keeps Ray powered, with roughly 60 days of reserve in darkness depending on use. Its lightweight, jewelry-like design makes wellness tracking part of everyday wear without routine charging breaks.
Ray starts at US$219. Batch 3 is available for preorder, with shipping expected December 2026–January 2027.
Chargerless is based in San Francisco and was founded in July 2025 by Andy Kong, who studied at MIT and previously worked at Google. Chargerless is bootstrapped.
Photo credit: Chargerless.
Key Highlights
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HealthTech
Category classification
Listed Nov 2026
On Startup List since launch
What's Great
- ✓Solar-powered
- ✓No charging port
- ✓No subscription
- ✓Lightweight 7 g
- ✓iPhone and Android support
What Could Improve
- ✗Currently on preorder for December 2026–January 2027 shipping
- ✗Solar replenishment needs direct outdoor sunlight
Use Cases
Visual Content
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Team Productivity
Integrate Chargerless Ray into your workflow to save hours every week.
Startup Operations
Give your startup the output of a much larger team with AI-powered automation.
Best For
- •Founders in HealthTech who need a practical tool for execution
- •Teams that want faster output with less operational overhead
- •Operators looking for actionable insights and repeatable workflows
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Chargerless Ray FAQs
What is Chargerless Ray best used for?
A 7 g solar-powered wellness tracker with no charging port or subscription. Track sleep, heart rate, HRV, temperature and steps.
Is Chargerless Ray suitable for early-stage startups?
Chargerless Ray can be suitable for early-stage teams, especially when speed and focused execution matter more than large team complexity.
How does Chargerless Ray compare to alternatives?
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Alternatives to Chargerless Ray
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| Chargerless RayThis | HealthTech | paid | — |
 Peptide Tracker | HealthTech | free | — |
 AgendaPlus | HealthTech | free | — |
 Kalance | HealthTech | freemium | — |
B BastionGPT | HealthTech | paid | — |
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