Harmoni Heating vs Guernsey Library
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Harmoni Heating
Easily manage your smart radiators from anywhere. Group devices by zone, adjust temperatures remotely, and personalize heating schedules for energy savings. Monitor consumption and costs with detailed statistics.
- Remote temperature adjustment
- Zone grouping for radiators
- Customizable heating schedules
- Energy consumption monitoring
- Preset heating programs
- Screen color customization
Read full descriptionHide full description
NEW VERSION AVAILABLE This last update includes: - Explanatory videos in the pairing process. - Clearer and more visual programming bar. - Reorganisation of advanced functions. - Preview of screen colours in the application. - Incorporation of hotel mode. - Brightness control of the devices. - Early start control. - Addition of new languages: Italian. - Activation of locks and hotel mode from a zone. - Improvements in the statistical control. - Error correction. ____ Control your Harmoni radiators the easy way, whenever and wherever you are. - Group your radiators by zones (such as rooms or floors in a house) or, if you prefer, control them individually. - Modify the temperature of your radiators when you need to, at any time, in any place. - Personalise the programming of your radiators or use one of the 4 preset heating programs installed and increase the energy savings of your heating system. - Check the energy consumption and cost of your radiators by entering the price of your electric tariff. - Customise the screen background colour of your products. A 2.4 GHz Wi-Fi connection with internet access is required by the products to work properly.
Guernsey Library
Read full descriptionHide full description
Make the most of Guernsey’s Guille-Allès Library. Renew your loans, search the collection, place reservations, and find your next great read. PLUS, use your device to borrow items while you're in the Library.
Screenshots
Verdict
The clearest difference is iOS requirement: Harmoni Heating at 14.0 against Guernsey Library's 16.6. On price, update cadence, ads and in-app purchases 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on September 24, 2026 and September 25, 2026 respectively.
| Parameter | Harmoni Heating | Guernsey Library |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 26.7% of reviews | — |
| Update frequency | Every 2 months | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 14.0 — better | 16.6 |
| Further details — not scored | ||
| Size | 80 MB | 199 MB |
| Age rating | 4+ | 4+ |
| Developer | Home Domotic Developments, S.L. | Guernsey Library |
In-app purchases
Harmoni Heating
No in-app purchases
Guernsey Library
No in-app purchases
Questions
Is Harmoni Heating free?
Is Guernsey Library free?
Do Harmoni Heating or Guernsey Library have ads?
Which is updated more often, Harmoni Heating or Guernsey Library?
Other comparisons
