Remote monitoring without a Nest or similar stat

Roddy

Single pipe steam with simple thermostat.  I like both of these very much as they both work well.  I’d like to monitor my home temp when I’m away without messing with or changing my thermostat.  Want to make sure my older boiler is still working well.  Any suggestions on products available with apps I can download to my iPhone to accomplish this goal?
Thanks,
Rod

Gsmith

https://tempstick.com/?gclid=Cj0KCQiA1rSsBhDHARIsANB4EJZnnRKMMBPj6t88qFNggHF6E5qWKEGjyRF5tQLH2YRVjwhQjfveg5IaAoiYEALw_wcB

Kinda pricey, but works well, I've had a few for 2+ years, still on the original batteries, will send alerts at whatever temperature you want.

holograham

https://www.amazon.com/Govee-Temperature-H5179-Thermometer-Notification/dp/B0C39TSV2W/ref=sr_1_1_sspa?crid=2UX5SHVL9G61C&keywords=govee+thermometer/hygrometer&qid=1703775801&sprefix=govee+ther,aps,137&sr=8-1-spons&ufe=app_do:amzn1.fos.18ed3cb5-28d5-4975-8bc7-93deae8f9840&sp_csd=d2lkZ2V0TmFtZT1zcF9hdGY&th=1

I use these - have one in nearly every major room of my house. Good battery life. Easy to use app.