Older Nest Learning Thermostats lost app support in 2025: what still works, and Google's update policy

Owners of the oldest Nest thermostats lost the app in October 2025. From October 25, 2025, according to Google's help page on the change, the Nest Learning Thermostat (1st gen, 2011), the Nest Learning Thermostat (2nd gen, 2012) and the European version of the second generation (2014) no longer work with the Google Nest app or the Google Home app. The page presents this as Nest's announcement of the end of support for those models. This guide sets out what the end of support changed, what still works, and what Google says about how long its newer smart home devices receive security updates. It does not assess any thermostat.

What stopped on October 25, 2025

Google says each affected thermostat was unpaired and removed from the Nest or Home app on that date. Owners can no longer check the thermostat's status or change its settings from a phone or tablet. The change also removed third-party assistants and other connected or cloud-based features, and Google names two of them: Home/Away Assist, and Eco mode control across several devices.

One change reaches beyond the thermostat. Google says Nest Protect alarms also disconnect from these thermostats, and that the emergency shut-off no longer runs. Anyone who relied on that link between the two devices has lost it, according to Google's description.

What still works

The thermostats keep running on their own. Google says owners can still use the controls on the thermostat itself: they can manage auto-schedule settings, existing schedules carry on running without interruption, they can switch temperature modes, and every other on-device feature and setting stays available.

What they no longer get is software. Google says the devices will get no further software or security updates, warns that their performance may decline the longer they are used, and says they still send logs used to diagnose problems. In our reading of Google's published update history for the older Learning Thermostats, the most recent entry that names the first and second generations is version 5.9.4-5, released on October 10, 2019, which added short-cycling and power-loss mitigation for those two models only.

Google says owners of affected thermostats received an email with an offer. The only offer its help page spells out, as we read it, is for the EU: eligible users were offered a 50% discount on the latest tado° thermostat, valid until November 30, 2025, with emailed codes for up to three thermostats per home and Google Support for eligible users who needed more. On November 13, 2026, the page also offered a postage-paid shipping label for recycling the thermostats through a third-party partner. Google says the model, serial number and software version can be confirmed in the thermostat information menu of the Nest or Home app.

Google's update policy for its other devices

For the rest of its smart home range, Google publishes a minimum. Its security update page says Google Nest connected home devices will receive automatic security updates for at least five years from the date Google starts selling them on the US Google Store. Google says the updates cover critical issues it knows about that a remote software update can fix. For each device, the page gives a release date, the five-year minimum and whether it is currently receiving critical security updates.

In our reading of the full table, the first Chromecast is the only device marked as no longer receiving critical security updates, and every thermostat listed is still marked as receiving them, three of them past their five-year minimum. The first- and second-generation Learning Thermostats do not appear in the table.

Google's thermostat update history shows releases continuing past those minimums. Version 6.5 reached the third-generation Learning Thermostat and the Nest Thermostat E in the US on October 21, 2026, and version 2.2-9 reached the Nest Thermostat on March 24, 2026. The fourth-generation model, still within its minimum, received version 2.4 on April 30, 2026.

Reading a five-year minimum

Google measures its minimum from the date it starts selling a device on its US store, not from the day a particular unit is bought. As we read that, a thermostat bought late in a model's run carries less of the guarantee than one bought at launch, and the table, not the purchase date, shows where a model stands. A minimum is also only a floor: as the table shows, Google has kept updating some devices well past theirs, and, by our count, the most recent entry in Google's update history that names the first and second generations was six years old when their app support ended.

For what FTC staff found when they looked for update periods on 184 smart product pages, and for the UK and FCC disclosure rules, see our guide to smart device update periods.