Comparison

EMBER Smart Heating Control vs OnSite

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

Head to head
About

EMBER Smart Heating Control

Control multiple heating systems, including radiators and underfloor heating, from your smartphone. Manage multiple zones and homes with intuitive navigation and advanced features like grouping and setback modes.

Highlights
  • Control 4 heating system types
  • Manage multiple zones and homes
  • Zone grouping for simultaneous control
  • Setback mode for energy saving
  • Quick Boost temperature setting
  • Eco Monitor for usage tracking
  • Improved setup and user management
Features
Read full description

One App, Four Systems! EMBER Smart Heating Control has been updated to control a new range of EPH Controls products with the EMBER logo including the smart Radiator System RS and smart Underfloor System US. Ask your installer for EPH EMBER today. With improved and intuitive navigation you will have easier access to your homes heating system and improved control of multiple zones and multiple homes from the palm of your hand. EMBER Smart Heating can control 4 types of heating systems: EMBER PS – Programmer System. Version 1: This system is comprised of our wireless enabled R-Series programmers, thermostats using the GW01 gateway Version 2: This system is comprised of our wireless enabled R-Series version 2 programmers and thermostats using the GW04 gateway. EMBER RS – Radiator System. This system is comprised of our new RF16 controller, eTRV and eTRV-HW using the GW04 gateway. EMBER TS – Thermostat System. Version 1: This system is comprised of our WiFi ready CP4-OT and CP4-HW-OT thermostats using the GW03 gateway. Version 2: This system is comprised of our version 2 WiFi ready CP4v2, CP4D and CP4-HW thermostats using the GW04 gateway EMBER US –Underfloor System. This system is comprised of our new Underfloor heating controller UFH10-RF and thermostats using the GW04 gateway. New Features Grouping It is now possible to group zones to allow control of multiple areas at once, the user can set up to 10 groups and add their zones to these groups for easier control of the whole house. Setback (PS and US only) It is possible to set a heating zone to operate in a setback mode. This will allow the user to set a value from 1-10°C. When the system is timed off it will turn the temperature down by this value and activate if it falls below the lower level. Quick Boost It is now possible to set the Quick Boost temperature for heating zones with an expanded range. Eco Monitor The Eco monitor is now available on the TS and all version 2 products in the EMBER range. It can be activated in the Home Info section of the menu. It will show temperature logs for each zone and overall usage of the system in hours. Advance Function (PS and US only) Advance function can now be activated from the Zone Control screen. Improved Setup process For enhanced security and convenience, this version allows the installer to set up a customer home with their own credentials. When the home owner logs in, the installer will be removed from the home and the home owner will be assigned Super Admin status. Upgraded User Management The user management function has been improved with an extra security layer and more detailed user information. Schedule Overview A complete overview of your programming schedule is now available on the Schedule screen

About

OnSite

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OnSite, run every job like a pro Everything you need for every job, automatically organised. Stop losing photos, forgetting details, or chasing paperwork across different sites. OnSite keeps your jobs, notes, photos, and invoices in one place — and organises them for you based on where you are. Stay organised without thinking about it Create detailed site profiles with addresses, job types, and full service history. Pin important jobs and let OnSite highlight the ones closest to you as you move through your day. No digging. No guessing. Just the right job info when you need it. Photos sorted automatically, right where they belong Take before, after, and progress photos directly on-site. OnSite automatically assigns them to the correct job based on location. Add notes, captions, and drawings to your images so nothing gets missed, and everything is backed up for when you need proof. Never miss a job or an invoice again Stay on top of every service and every payment. OnSite sends smart reminders for upcoming jobs, when you’re due on site, and when it’s time to invoice. It even adjusts for weekends, bank holidays, and your working days so your schedule works around you. Works on real job sites, even without signal No reception? No problem. OnSite works fully offline and syncs everything when you’re back online. Your data is always available, whether you’re on-site, on the road, or at home. All your paperwork in one place Attach PDFs, documents, and files directly to each job. Preview, organise, and share everything without switching between apps. Set up in minutes, not hours Link your existing contacts to job sites instantly. OnSite can automatically match people to the right locations based on your data (saving hours of manual setup). Built for trades, not spreadsheets A clear monthly calendar shows all upcoming jobs and invoices at a glance. OnSite automatically calculates invoice dates and keeps everything on track. Get paid on time, every time Missed jobs mean missed money. OnSite keeps your work organised and your invoices on schedule — so nothing slips through the cracks. **Key Features** * Automatic photo sorting based on location * GPS-based on-site reminders * Full offline support with automatic sync * Service tracking with overdue alerts * Smart invoice scheduling * Photo markup and notes * File and document storage per job * Contact linking and auto-matching * iPhone and iPad support Built for real work. Real sites. Real jobs. OnSite: Show up prepared. Every time.

Screenshots

EMBER Smart Heating Control4 screens
OnSite4 screens

Verdict

The call

The clearest difference is update cadence: OnSite at every 3 days against EMBER Smart Heating Control's every 2 months. EMBER Smart Heating Control's advantage is iOS requirement (12.0 vs 17.0). On price, ads, in-app purchases and device support 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

EMBER Smart Heating Control ships an update every 2 months, OnSite every 3 days. The most recent releases landed on October 24, 2026 and October 12, 2026 respectively.

Scorecard2 real differences · 8 level
EMBER Smart Heating Control versus OnSite: the parameters behind the verdict, then further details
ParameterEMBER Smart Heating ControlOnSite
PriceFreeFree
Rating3.4 (9 ratings) — better—
Positive reviews52.2% of reviews—
Number of ratings9 — better—
Update frequencyEvery 2 monthsEvery 3 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS12.0 — better17.0
Further details — not scored
Size55 MB8 MB
Age rating4+4+
DeveloperEPH Controls LtdNathan Manley

In-app purchases

None

EMBER Smart Heating Control

No in-app purchases

None

OnSite

No in-app purchases

Questions

Is EMBER Smart Heating Control free?
EMBER Smart Heating Control is free to download, with no in-app purchases.
Is OnSite free?
OnSite is free to download, with no in-app purchases.
Do EMBER Smart Heating Control or OnSite have ads?
Neither EMBER Smart Heating Control nor OnSite shows ads.
Which is updated more often, EMBER Smart Heating Control or OnSite?
EMBER Smart Heating Control ships an update every 2 months, and OnSite every 3 days. Most recently, EMBER Smart Heating Control was updated on October 24, 2026 and OnSite on October 12, 2026.

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