Which mobile devices work with my S40 Smart Thermostat and app?
FAQ , Thermostats , Troubleshooting Modified: March 19, 2026
The Lennox Home App is compatible with Apple smart phones and tablets and Android smart phones and tablets. The versions that are currently supported are:
• Latest iOS + the 2 previous versions
• Latest Android + the 3 previous versions
Older versions are available, however, they will not be supported and/or updated. You can use these versions at your own risk.
Find a Local Pro
Enter your zip code to find a Lennox® dealer near you for service, support, or installation.