---
title: "OJ Microline® UWG4 - Reviews, Revenue and Downloads in United States | Apple App Store"
description: "The OJ Microline® UWG4 app lets you make the most of your OJ Microline® UWG4 Touch thermostats: use the app to remote control your home heating system from any location.   Like the thermostats themsel"
---

# OJ Microline® UWG4 — United States

![OJ Microline® UWG4 App Icon](https://is1-ssl.mzstatic.com/image/thumb/Purple211/v4/ad/1c/13/ad1c1340-8081-637c-5b1f-aae5d0000b1b/Microline-0-0-1x_U007emarketing-0-9-0-85-220.jpeg/434x0w.png)

**Developer:** [OJ ELECTRONICS](https://apptail.io/developer/oj-electronics-bgLb)
**Category:** Lifestyle
**Rating:** 2.1/5 (26 ratings)
**Price:** Free
**Bundle ID:** com.ojelectronics.microline
**Store:** Apple App Store
**Country:** United States
**Version:** 1.8.0 (released 2025-09-15)
**Original Release:** 2015-10-15
**Languages:** English, French, Spanish

**App Store Link:** [Download on Apple App Store](https://apps.apple.com/us/app/app/id1046778776)
**AppTail Page:** [https://apptail.io/app/oj-microline-uwg4-ENh/united-states](https://apptail.io/app/oj-microline-uwg4-ENh/united-states)

## OJ Microline® UWG4 Description
The OJ Microline® UWG4 app lets you make the most of your OJ Microline® UWG4 Touch thermostats: use the app to remote control your home heating system from any location. 

Like the thermostats themselves, the app is entirely intuitive and easy to handle – making it simpler than ever to ensure maximum savings on your heating bill while still enjoying a warm welcome every time you step into your home. 

• View and set temperatures
• View your heating schedule – and change it
• Set your heating system to vacation mode
• View your energy log 

View and set temperatures: You can instantly see the current temperature in all your rooms and locations fitted with OJ Microline® UWG4 Touch thermostats. And make any adjustments you want. Want your beach house heated for your weekend visit? Need the guest bedroom warmed up for an unexpected visitor? Or your bathroom ready for a nice, long soak when you get home? No problem. 

View and change your heating schedule: One of the key benefits of your OJ Microline® Touch thermostat is its schedule function, where the thermostat automatically adjusts heating levels to match your usual timetable. However, sometimes you need a bit of flexibility, and this app lets you override the schedule to adjust temperatures as you wish – from any location including your home.

1. Fast-forward to the next scheduled change (e.g. to turn up the heat because you’re coming home early)
2. Make instant temporary adjustments  (for example, you might want to turn down the heat everywhere for a good spring cleaning where every window is open)

Set your heating system to vacation mode: At times your heating schedule will need adjusting because you’re going away on vacation or on business. With the OJ Microline® UWG4 app you can plan those adjustments whenever you have a spare moment – and time them to take effect when you need them to. That way, you can walk out the door safe in the knowledge that you won’t waste money on heating an empty house – and that you’ll still get a warm welcome on your return. 

View your energy log: The app lets you monitor your heating system’s current and past energy consumption at any time and from any location.

The app works with the WLAN version of OJ Microline® Touch thermostats (UWG4)

• View and change your heating schedule 
• View and change heating settings
• View and set indoor temperatures
• Access multiple OJ Microline® Touch thermostats 
• Access multiple locations fitted with OJ Microline® Touch thermostats
• Set units to Standard US or Metric
• Choose between Fahrenheit or Celsius
• 24-hour or 12-hour clock


## OJ Microline® UWG4 Rating Breakdown in United States
- 5 stars: 2 (8%)
- 4 stars: 3 (12%)
- 3 stars: 4 (15%)
- 2 stars: 3 (12%)
- 1 stars: 14 (54%)

## OJ Microline® UWG4 Reviews in United States

### *---- "Won’t work on ioad"
Useless and confusing..nice thermostat but WiFi feature is of no value
-- mrbok39, 2024-12-09

### **--- "Limited, clunky app. You"
It doesn’t have a weekly input if you want to change the schedule for the whole week .  You have to change every day.
-- M Colbert, 2024-11-25

### *---- "Unusable"
I have two. One won’t connect to wifi. Both won’t let me adjust the schedules. I have toggled them off and hit save 100 times now. They always toggle back on. It’s actually obscene!
-- Papnic2234, 2024-04-20

### *---- "Account activation instructions wrong"
When you try to login you are prompted to do some account activation on your thermostat. ‘Follow those instructions for activation, WiFi’. But, the thermostat gives no instructions! It’s attached to WiFi and that’s it. Can’t connect app
-- jamiebeth1, 2024-01-27

### *---- "Update this app please"
It does not work. My network can’t find the thermostat and I can’t login. What’s the use.
-- THE REAL NYPR, 2023-02-01

### **--- "Why doesn’t UWG4 version connect to Google Home?"
I’ve been using this app for almost two years but recently decided to connect this to my Google Home Control Center for convenience for my entire home. However, UWG4 is not listed even though the sister app that ends in “5” is.  This is troubling and may force me to discard this thermostat controller for my floor heat in my sunroom and buy a Watts Water product to consolidate my house control. That is very unfortunate and therefore deserves a decrease in rating.
-- Doug Bubba Gessford, 2022-09-25

### **--- "App broke functionality in this latest version."
After updating the app on an iPhone13, functionality has regressed.   The title bar is no longer showing up properly.  This makes it difficult or impossible to navigate after a thermostat is selected or when I want to go to the settings page.
-- avoid-app, 2022-07-22

### *---- "Works fine until you get logged out"
The app was working fine for me (it is basic but fonctional) until I got logged out and was not able to log back in. There is absolutely nowhere to retrieve your login information (no “Forgot password” button) and now my fancy WiFi thermostat is just a thermostat. No WiFi access… 
It is very unfortunate in this day and age that developers are not more on point with the technology and user-friendly interface.
There is also nowhere to go on their website either, no FAQs page or anywhere to get help.
I have contacted OJ Electronics and waiting for their answer. Will add stars if they respond and solve this issue…
-- AL in Brooklyn, 2022-07-09

### *---- "Signing in"
There is no where on this app to set up an account. You can login or view the demo. I can’t run the app if I can’t find a way to set up an new email and password. Basically it’s worth what I paid for it. Nothing.
-- Jotnip, 2022-05-24

### ***-- "Very basic"
Well, interface looks very similar to what you see in the actual device, but only for the schedule setup, other settings have to be change directly on the thermostat. On the other hand what I most change is the schedule so… it’s a fair app.
-- JalaVer, 2021-05-19

[View all OJ Microline® UWG4 reviews and detailed analytics on AppTail](https://app.apptail.io/signup?utm_campaign=ai-crawl&utm_content=reviews)




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## OJ Microline® UWG4 Available In
- [United States](https://apptail.io/app/oj-microline-uwg4-ENh/united-states)
- [Denmark](https://apptail.io/app/oj-microline-uwg4-ENh/denmark)
- [Germany](https://apptail.io/app/oj-microline-uwg4-ENh/germany)
- [Dominican Republic](https://apptail.io/app/oj-microline-uwg4-ENh/dominican-republic)
- [Algeria](https://apptail.io/app/oj-microline-uwg4-ENh/algeria)
- [Ecuador](https://apptail.io/app/oj-microline-uwg4-ENh/ecuador)
- [Indonesia](https://apptail.io/app/oj-microline-uwg4-ENh/indonesia)
- [Israel](https://apptail.io/app/oj-microline-uwg4-ENh/israel)
- [India](https://apptail.io/app/oj-microline-uwg4-ENh/india)
- [Italy](https://apptail.io/app/oj-microline-uwg4-ENh/italy)
- [Lebanon](https://apptail.io/app/oj-microline-uwg4-ENh/lebanon)
- [Latvia](https://apptail.io/app/oj-microline-uwg4-ENh/latvia)
- [Malaysia](https://apptail.io/app/oj-microline-uwg4-ENh/malaysia)
- [Nigeria](https://apptail.io/app/oj-microline-uwg4-ENh/nigeria)
- [Türkiye](https://apptail.io/app/oj-microline-uwg4-ENh/turkey)
- [Ukraine](https://apptail.io/app/oj-microline-uwg4-ENh/ukraine)
- [Belgium](https://apptail.io/app/oj-microline-uwg4-ENh/belgium)
- [South Africa](https://apptail.io/app/oj-microline-uwg4-ENh/south-africa)
- [China](https://apptail.io/app/oj-microline-uwg4-ENh/china)

---

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