Best Free Indoor Thermometer Apps

246+ iOS apps curated and reviewed

4.0 avg rating
20 free apps
Updated October 2026

Thermometer is the household name in free indoor thermometer, but it's far from the only option. We track 246+ alternatives and competitors on iOS — many free, many higher-rated than you'd expect.

Compare top Free Indoor Thermometer Apps (October 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Thermometer: Digital RoomThermometer: Digital RoomFree3.8★ (79)NoYesNov 2026
2Thermometer - Indoor & OutdoorThermometer - Indoor & OutdoorFree4.2★ (3.3K)YesNoNov 2026
3Indoor ThermometerIndoor ThermometerFree4.2★ (2.9K)YesNoNov 2026
4HD Thermometer ⊎HD Thermometer ⊎Free4.3★ (13K)YesYesNov 2026
5Thermometer-Room&Indoor TrackThermometer-Room&Indoor TrackFree4.5★ (394)YesNoOct 2026
6ThermometerThermometerFree4.4★ (4.4K)YesYesNov 2026
7Indoor Thermometer: Room TempIndoor Thermometer: Room TempFree—YesYesOct 2026
8Room Thermometer: TemperatureRoom Thermometer: TemperatureFree—YesYesNov 2026

Top Picks for Free Indoor Thermometer

Thermometer: Digital Room#1

Thermometer: Digital Room by Tirin

Check indoor heat & weather!
Editor's Choice
☀️ Weather
3.8(79 ratings)
FreeIn-App Purchases
Thermometer: Digital Room screenshot 1
Thermometer: Digital Room screenshot 2
Thermometer: Digital Room screenshot 3
Thermometer: Digital Room screenshot 4
Thermometer: Digital Room screenshot 5
Thermometer: Digital Room screenshot 6

This app transforms your smartphone into a precise digital thermometer. It displays real-time indoor room temperature, outdoor weather, and humidity levels with a classic retro interface. Customize themes and switch between Celsius and Fahrenheit for easy climate monitoring.

Thermometer - Indoor & Outdoor#2
4.2(3.3K ratings)
FreeAds
#71in Weather
Thermometer - Indoor & Outdoor screenshot 1
Thermometer - Indoor & Outdoor screenshot 2
Thermometer - Indoor & Outdoor screenshot 3
Thermometer - Indoor & Outdoor screenshot 4
Thermometer - Indoor & Outdoor screenshot 5
Thermometer - Indoor & Outdoor screenshot 6

This app provides real-time temperature readings for both indoor room environments and outdoor locations worldwide. It offers detailed weather forecasts, including hourly and daily predictions, wind speed, humidity, and sunrise/sunset times. Easily monitor your home comfort or plan your travels with location-based weather information.

Indoor Thermometer#3

Indoor Thermometer by Ravibhai Ramani

Indoor temp, outfit & tips
Worth Considering
☀️ Weather
4.2(2.9K ratings)
FreeAds
#24in Weather
Indoor Thermometer screenshot 1
Indoor Thermometer screenshot 2
Indoor Thermometer screenshot 3
Indoor Thermometer screenshot 4
Indoor Thermometer screenshot 5
Indoor Thermometer screenshot 6

This app provides accurate indoor temperature readings in Celsius and Fahrenheit, along with outdoor weather context. It offers outfit suggestions, seasonal lifestyle tips, and the ability to create and share custom temperature cards with themed wallpapers.

More Free Indoor Thermometer apps to explore

FAQ about Free Indoor Thermometer

What are the best free indoor thermometer apps for iPhone?
Thermometer: Digital Room tops our free indoor thermometer apps ranking as of October 2026, with a 3.8-star average from 79 App Store ratings, and it's free to download.
Thermometer: Digital Room has no ads and offers in-app purchases, according to its App Store listing as of October 2026.
We track 246+ free indoor thermometer apps on the iOS App Store as of October 2026, ranked by rating, recency, and analysis of real user reviews.