Comparison

HT400 vs E.C.A. Poly Smart

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

HT400

This smart thermostat app allows you to remotely control your home's temperature with precise accuracy. Save on energy bills by creating custom schedules and utilizing intelligent modes. Monitor historical data and manage multiple homes or family members from a single application.

Highlights
  • Remote temperature control worldwide
  • Daily/weekly program creation
  • Six distinct control modes
  • Location-based temperature adjustment
  • Historical heating reports
  • Multi-home and family sharing
Features
Read full description

How does HT 400 SMART ROOM THERMOSTAT WORKS? HT 400 Smart room thermostat with its 0,1-degree​ measurement accuracy sets your home temperature via application as you desired. You can save up to %30 of your gas bill by preventing boiler work unnecessary. What are the advantages of HT 400 Smart Room Thermostat? - With Smart room thermostat, you can control your home temperature by app wherever you are in the world. - Create daily or weekly programs easily by your Smart Room Thermostat App. - You can choose one of the 6 different modes which suit your situation and control your home temperature. (Home Mode-Sleep Mode-Outside Mode-Program Mode-Location Mode-Manual Mode) - Using Location Mode reduces the temperature of your home when you move away from home or increases the temperature when you approach your home. - Depending on the date range selected from the smart room thermostat's mobile application, you can get a historical report of your heating unit's working hours, the temperature of your home and the outside temperature gracefully. - You can add more than one home to your app and can control all with one app. - You can invite your family members to app and share control of your home. - HT 400 Smart Room Thermostat is only compatible with On/Off boilers.

About

E.C.A. Poly Smart

Control your home's heating remotely with this smart thermostat application. Set custom schedules, monitor temperature with open window detection, and save on energy bills. Manage multiple properties and share access with family members.

Highlights
  • Remote temperature control
  • Daily and weekly scheduling
  • Open window detection
  • Multiple home management
  • Family sharing
  • Comfort, Economy, Holiday modes
Features
Read full description

E.C.A. POLY SMART THERMOSTAT E.C.A. POLY SMART Thermostat keeps the temperature of your home constant at the temperature you set via the application with a minimum 0.1 degree adjustable operating sensitivity. Thus, it saves up to 30% on your natural gas bills by preventing unnecessary operation of your boiler. It measures the sudden temperature changes in your home with its open window detection feature and prevents unnecessary energy consumption by switching off the boiler. - You can practically create daily and weekly schedules from the application of your smart room thermostat. - By adding more than one house to your application, you can control your other houses through a single application. - You can share home management by sending invitations to your family members with the application. - E.C.A. POLY SMART Thermostat; Thanks to its open window detection feature, if it detects a sudden decrease in room temperature that may occur if the door or window is opened, it switches to alarm state and switches off the boiler. - You can choose the most suitable mode for your situation and manage the temperature of your home with Comfort, Economy, Holiday, and Program modes of E.C.A. POLY SMART Thermostat. If you wish, you can manually provide instant temperature change. E.C.A. POLY SMART Thermostat Usage Modes - Comfort: Keeps the temperature of your home constant at the set value. You can use it during the periods when you are usually at home. - Economy: Provides a comfortable sleep. You can use it between 23:00-07:00, which is usually sleeping hours. - Holiday: This is the mode you can choose when you will be away from home for a short or long time. You save money when you are not at home. - Weekly Program: You can create daily or weekly schedules for the time periods you want. Thus, E.C.A. POLY SMART automatically adjusts the set temperature changes on its own.

Screenshots

HT4004 screens
E.C.A. Poly Smart4 screens

Verdict

The call

The clearest difference is iOS requirement: HT400 at 8.0 against E.C.A. Poly Smart's 12.0. On price, review sentiment, update cadence and ads there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

HT400 ships an update every 3 months, E.C.A. Poly Smart every 4 months. The most recent releases landed on October 6, 2026 and October 1, 2026 respectively.

Scorecard1 real difference · 9 level
HT400 versus E.C.A. Poly Smart: the parameters behind the verdict, then further details
ParameterHT400E.C.A. Poly Smart
PriceFreeFree
Rating1.0 (1 ratings) — better—
Positive reviews0.0% of reviews0.0% of reviews
Number of ratings1 — better—
Update frequencyEvery 3 months — betterEvery 4 months
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPodiPhone, iPod
Requires iOS8.0 — better12.0
Further details — not scored
Size28 MB172 MB
Age rating4+4+
DeveloperISIPARK IC VE DIS TICARET INSAAT ISITMA SISTEMLERI OTOMOTIV SANAYI ANONIM SIRKETIEMAS MAKINA SANAYI ANONIM SIRKETI

Customer experience

HT400

All ratings1 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews3 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

E.C.A. Poly Smart

Written reviews7 reviews
Positive0.0%
Neutral14.3%
Negative85.7%

In-app purchases

None

HT400

No in-app purchases

None

E.C.A. Poly Smart

No in-app purchases

Questions

Is HT400 free?
HT400 is free to download, with no in-app purchases.
Is E.C.A. Poly Smart free?
E.C.A. Poly Smart is free to download, with no in-app purchases.
Do HT400 or E.C.A. Poly Smart have ads?
Neither HT400 nor E.C.A. Poly Smart shows ads.
Which is updated more often, HT400 or E.C.A. Poly Smart?
HT400 ships an update every 3 months, and E.C.A. Poly Smart every 4 months. Most recently, HT400 was updated on October 6, 2026 and E.C.A. Poly Smart on October 1, 2026.

Other comparisons