As you know probably that wifi thermostat are not cheap.They easily cross the 100 $ range.But in an age when everything is becoming smart device controlled like Alexa or Google assistant one would naturally gravitate towards a wifi thermostat that could be used with such devices in your home.
However finding a affordable wifi thermostat could be a pain when looking at so many models.So we have compiled a list of some good and cheap wifi thermostat that you could get from amazon.Based on customer reviews and experience using them the thermostats listed below are a decent value for your money.
One thing we would like to point out is that most of the time you don’t require a smart learning thermostat like Nest.This is because of the complexities of using such features.Your wifi thermostat may or may not have smart features like Geofencing.IFTT,Auto adjustment of schedule based on your past setting and other conditions like wether hmidity etc. But these are hardly the features most of the people will use.For example Geofencing which lets you change temperature with geolocation is hardly of any use if you routine is same on most of the days of the week.So a simple 5-2 days schedule will solve the same purpose.Also adjusting temperature multiple time whether automatically like in smart thermostat or manually is damaging to you hvac instruments and may cause higher energy consumption.So predominantly a thermostat which you can program and control remotely through app or your voice is the most desired features that will be more than you want to use in wifi thermostats.The prices of these thermostat will reflect according to these feature on the thermostats.
1.)Vine WiFi Programmable Smart Home Thermostat – 2nd Gen
Vine thermostat can be bought for about 70 dollars and it has all the feature of a wifi controlled thermostat.However it does not have few of the features like Geofencing and auto schedule feature of AI that learns your pattern.You have to manually program the thermostat for different setting you want.Other than that this device can be connected to any of you smart devices like tablet phone and can be accessed remotely. It can connect with home automation devices like Amazon Alexa and Google home assistant.
It is compatible with most of the HVAC devices common in US and Canada and comes with weather forecasting up to five days through its cloud compatibility.It also has humidity indicator.Amazon offers tech support or the product for upto 90 days and it also comes up with 30 days return no question asked and get repair service for 3 years and a lifetime technical support.Vine also claims to give feedback within two working days.
Click here for more detail, price , reviews and ratings of Vine WiFi Thermostat
2.)Radio Thermostat CT50 7-Day Programmable Thermostat
This 7 day programmable thermostat works with most of the HVAC units whether single or multi stages.It is the cheapest thermostat in the list and can be bought for about 55 $.It can be powered by using either 3 AA batteries or a C wire.The good feature we like is that you have the option of Geofencing with this thermostat along with other features which are common with others like remote access with smart phone tablet or home assistant devices.The thermostat can be accessed by multiple phone so that more than one family member can adjust temperature from anywhere as long as you have internet.It comes with pre built energy saving program that you can alter as your requirement. However it is not compatible with home automation devices.
This device may not be compatible with windows 10. This video explains how you can overcome that.
Click here for more detail, price , reviews and ratings Radio Thermostat
3.)Emerson Sensi Wi-Fi Smart Thermostat for Smart Home, DIY.
The thermostat is an old model of Emerson and can be bought for 97 $.It offers most of the feature of a smart thermostat like Geofencing,smart alerts for extreme temperature or humidity.The installation instruction is provided in the app with which you can manually install the thermostat in minimum of 30 minutes.The thermostat is also compatible with most hvac instrument.You can check compatibility from here.
The thermostat is Geofencing enabled through Sensi phone app and is compatible with most home automation like Apple home kit Amazon alexa or samsung smart kit.
Click here for more detail, price , reviews and ratings of Emerson Sensi Wifi Thermostat
4.)Sensi lite smart thermostat
If you want to save another twenty dollars you can buy Emerson sensi lite thermostat. It is a ow end model of Sensi touch smart thermostats.
It has all the smart feature like Geofencing, Voice control thorough Amazon Alexa oe Google Home assistant.
In addition it has plus side that it has touch screen.
The only downside is it is not compatible with humidifiers or dehumidifiers like other Sensi smart thermostats.
Click here for more detail, price , reviews and ratings of Sensi lite smart thermostat on Amazon
5.)AirPatrol WiFi Smart Air Conditioner Controller
This thermostat is on our list because this thermostat will not require you to have any changes in your current AC system even if your AC system is old.The only exception is wired central ac system that do not use ir remote control. It can connect to 10,000 different AC and heat pump models.If you consider the cost of buying a new Ac system because your contemporary thermostat wont connect to it this a deal in terms of money.If your AC is multi split you can add multiple thermostats and control all of them with one app on a single phone.It has Fahrenheit as well as Celsius reading option.Most customer found it easy toset up some even in 5 minutes.
Also this is a smart thermostat as it allows IFTT and geolocation(Geofencing) to control your temperature.All that for $100.
Click here for more detail, price , reviews and ratings of AirPatrol WiFi Air Conditioner Controller
6.)LUX CS1 Smart Programmable Digital Wi-Fi Thermostat
Although a smart thermostat with impressive features like smart learning- A feture that enables it to adjust the seeting by learning your preference like in the Nest thermostat and other features like Geofencing and Home away this thermostat comes at only around sixty dollars. Being a wifi thermostat it is compatible with phone App and also has voice controlling features using Amazon Alexa or Google Home assistant and even has IFTT compatibility.
You can manage multiple thermostats, user and locations using thermostat manager.
Smart alerts like temperature and filter change and also energy usage and utility cost report are also noteworthy features of this thermostat for your the price.
7.)Wyze Programmable Smart WiFi Thermostat
Wyze Smart Thermostat is one of the most popular and talked about wifi thermostat with manny smart features industry mainly because of its affordability some smart features. Here are its key features:
- Easy DIY Installation: With clear instructions, most installations can be completed in under 30 minutes.
- It is compatible with 90% of home systems, and a C-wire adapter is included for homes without a C-wire.
- You can share control of the thermostat with guests and family members through the Wyze app.
- Voice Assistant Compatibility: The Wyze Smart Thermostat works seamlessly with popular voice assistants like Alexa and Google Assistant.
- It dooes not have IFTT or Homekit compatibility but you can configure it to work with other Wyze devices like the Wyze Cam V3,Wyze Lock, Wyze Plug, Wyze Cam Floodlight. For ex you can turn heating or cooling On if connected Wyze camera detects motion etc.
- It has Home,Away and sleep temperature preference and also Geofencing also called auto switch feature.
- The Wyze app provides usage tracking capabilities, allowing you to monitor your energy consumption pattern providing identify opportunities for energy savings.
- Energy-Saving Features: It automatically turns on and off based on built-in motion sensors and detects your phone’s location to adjust the temperature accordingly.
- If you input it’s % usage and sizes and expected life time of different filters and it gives you alerts on when it’s time to change them for higher HVAC efficiency.
Note -This thermostat does not have adaptive learning according to your scheduled and routines like high End thermostat like Nest.
8.)Amazon smart thermostat
This thermostat from Amazon comes for only around $70 is a catch if you only have Amazon Alexa at your home as it only works with it for voice commands and not with other automation system like Gogle home asiatant, Apple Home kit or IFTT.
It is an output of collaboration of Amazon and Resideo(Owner of Honeywell home thermostat). Its inside structure is very similar to Honeywell T 5 and T9 thermostats.
It requires C wire and you need to pay extra for power adapter kit if your HVAC device do not have one.
It has built in temperature and humidity sensors but do not have option for remote sensors.
One distinctive feature of this thermostat from other cheap thermostat that claims to be smart is that it has learning capability that anticipated your heating or cooling needs based on your interaction with thermostat and location of your smart phone. It calls them hunches.
So for ex if you leave more often at certain time it will lower the heating or cooling unless someone interfere and change it at your home.
It can also be programmed for standard schedule if you don’t want Amazon thermostat to control via its hunches.
In both case you can use Alexa routine to enable the thermostat to do certain function based on time of the day. The routine can be initiated by input from smart home sevices like compatible temperature sensor, motion sensor or your voice.
You can view energy usage report and estimate of your energy cost with inputs such as home size and your prior monthly heating and cooling costs.
It is east to install and supports most forced air, radiant boilers and multistage 3 heat/2 cool heat pumps but not with duel fuel systems.
Click here for more detail, price , reviews and ratings of Amazon smart thermostat on Amazon
Honeywell RTH6580WF1001 and RET97E5D1005 wifi thermostat
Of all the wifi thermostats by Honeywell these are the cheapest. Both the units have practically the same hardware and have same function but of the two Honeywell RTH6580WF1001 was intended to be sold online while other was not.
But RTH6580WF1001 is recommended as it has more and recent reviews.
Although it used to be sold at $99 it Honeywell has reduced its price to $79. At this price it offers the capability of setting and changing temperature set point using phone or tablet. It also works with Amazon Alexa and Google home assistant and even compatible with IFTT.
It is compatible with most boilers and heat pumps withup to 3 Heat/2 Cool Heat Pump Systems and up to 2 Heat/2 Cool Conventional Systems however you would require C wire.
It is smart response technology oh Honeywell but do not have AI learning capability of your routine or schedule. It also do not have Geofencing enabled or Auto home/Away mode or remote sensors.
If you want those feature you can opt for Honeywell T5 thermostat.
Honeywell T5 RTH8800WF2022 thermostat
Honeywell T series are latest addition to what honeywell calls thermostat and alternatives to lyric 2.0 thermosts which is now discontinued round. T5 is the cheapest of them all.
It has wifi compatibility and works with Apple homekit along with Amazon Alexa, Gogle home kit and Google home assistant which Honeywell RTH6580WF1001 does not support.
It has Geofencing( Auto Home/ Away) feature to control your HVAC based on your location. It can set the temperature when you are not at home automatically or your manually pre set temperatures. It also has smart response/ adaptive recovery technology.
It does not support remote sensors and duel fuel systems. Otherwise it is compatible with most heating and cooling devices upto 2 heat with auxiliary and 2 cool stages and requires C wires. It has a similar but higher version T6 if you want it for duel fuel systems.
It use to be sold for higher price but now available at $99 on Amazon or Honeywell store.
Robertshaw RS10420T Pro Series wifi thermostat 
This is a simple wifi thermostat that will work with most HVAC systems with upto 4 stage heat/2 stage cool systems.
However it is compatible with Amazon Alexa only.
It does not have many features Ike Geofencing, remote sensors AI learning capabilities. Also for its price of around $70 you can can other wifi thermostats with more functions. It is therefore not so popular among customers.
But it is useful in case you want an adjustable differential thermostat. It comes capability to adjust differential temperature from 0.5 to 3 degree. It is the temperature difference between setpoint and next higher or lower temperature to switch On heating or cooling device. It can be useful to prevent short cycling of your HVAC device.
It also has minimum(maximum 5minutes) compressor ON/OFF delay to protect short cycling of compressor.
It requires C wire and do not have battery backup. It is 7 day or 5-2 4 times a day programmable and has warranty of 6 years.
Other than the above thermostats I found few thermostat like the Beca,Beok or Qiao xi pan on which are chinese manufacture selling on Amazon but is available for purchase in Alibaba.These thermostat are not so reliable for obvious reason but if you want a thermostats quite low in price you can find multitude of these thermostats at aliexpress.com and find them or similar other wifi thermostats quite easily there and get it mailed through cheap china post.But as said these thermostat wont have the customer support or maybe clear installation instruction as i read in few of the reviews for models sold on Amazon.