Good Day OS Seeks 10 Founding Facilities for Sauna and Cold-Plunge Software Pilot

Denver-based Good Day | Thermal Care & Operations (Good Day TCO) is recruiting approximately 10 founding facilities for the initial pilot of Good Day OS, its operations software for venues with saunas, cold plunges, steam rooms and hot tubs. Founder Dan Mills told SaunaNews on October 27 that the software is operational, demonstrations are available and interested operators can join the pilot through the company.

Good Day began with specialized sanitation and now also provides operations support and maintenance coordination. Mills says its hands-on work remains Colorado-based: it has three facilities contracted for certified pool operator (CPO) oversight and one sanitation service client, all in the Denver market. Good Day OS is being developed for a national market.

From sticky notes and paper logs to a shared operations record

Mills said he repeatedly found water-chemistry logs, maintenance schedules, sanitation procedures, equipment issues and staff responsibilities scattered across sticky notes, texts, missed Slack messages and paper logs while working inside thermal facilities.

“I didn’t set out to build software. I set out to solve the operational problems I kept seeing inside thermal facilities. The more I worked on the physical care side, the more obvious it became that the industry needed better systems behind the scenes,” Mills said.

What Good Day OS does today

According to Mills, current functions include facility dashboards, amenity management, recurring inspections and sanitation checklists, water-chemistry documentation, filter maintenance tracking, issue reports and operational history. Separate owner and operator views let frontline staff document their work while management reviews facility operations.

The platform distinguishes completed work from checks that were missed or never documented. The company’s October 22 overview shows a demonstration dashboard with tasks still due, open issues, water readings to review, filters due soon or overdue, and checks missed in the last seven days. Those screens represent a fictional facility, not an identified pilot customer.

Sensors and remote controls are development plans

Mills described live water-chemistry sensor integration, CO₂ and indoor air-quality monitoring, and remote equipment management as planned development directions. His longer-term goal includes letting authorized operators adjust sauna and other thermal equipment settings from a phone or computer where compatible control systems support it. These are plans, not capabilities currently available across the platform.

Documentation still has to fit local requirements

Good Day’s overview says the software supports operations workflows and documentation “but is not itself a compliance certification.” Operators remain responsible for their local requirements. Our reporting on the three legal identities a cold plunge can have and cold-plunge guidance on chlorine, turnover and signage explains why those requirements vary.

Before choosing any logging software, operators can ask their health department what records it requires and ask the vendor to demonstrate how a month of water readings can be retrieved and supplied in that format. Missed-check handling, notifications and the treatment of late entries also deserve a demonstration. These are questions to verify, not confirmed Good Day OS features.