SupplyMaster vs ThermoSphere
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SupplyMaster
Control your immersion heater or lighting remotely via your phone or tablet. Save money by adjusting schedules from anywhere, ensuring you only use energy when needed. Offers multiple operating modes for flexible control.
- Remote programming
- Energy saving
- Auto, Permanent Off, Permanent On modes
- Holiday mode
- Advance and Boost functions
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Timeguard Supplymaster can be used to provide convenient, easy programming of your immersion heater or lighting from your phone or tablet. Changes to programmes can be made from any location, which will enable the user to save money by cancelling unwanted programmes during periods of unexpected absence. There are 4 operating modes, Auto, Permanent off, permanent on, and holiday. There are also advance and boost functions. For use with the Timeguard FSTWiFi and FSTWiFiTGV WiFi controlled fused connection units.
ThermoSphere
Easily manage your ThermoSphere electric heating devices from anywhere in the world. Control heating manually, set intelligent schedules, and access device settings all from your smartphone.
- Remote device control
- Heating schedule creation
- Manual control options
- Access device settings
- Compatible with various ThermoSphere devices
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Easy, simple control for ThermoSphere electric heating all in one place. The new and improved ThermoSphere app lets you control all of your ThermoSphere electric heating devices from your phone, from anywhere in the world. Compatible with ThermSphere SmartHome Thermostats, ThermoSphere WIFI Thermostats (2021 model onwards), ThermoSphere Glass Wifi Heaters and ThermoSphere SmartPlugs. Control manually or access the settings and heating schedule to build an intelligent and comfortable heating schedule.
Screenshots
Verdict
The clearest difference is update cadence: SupplyMaster at every 5 weeks against ThermoSphere's every 13 months. ThermoSphere's advantage is review sentiment (30% vs 11%). On price, ads, in-app purchases and monetization model 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.
SupplyMaster ships an update every 5 weeks, ThermoSphere every 13 months. The most recent releases landed on October 7, 2026 and September 29, 2026 respectively.
| Parameter | SupplyMaster | ThermoSphere |
|---|---|---|
| Price | Free | Free |
| Rating | 3.0 (2 ratings) — better | — |
| Positive reviews | 11.4% of reviews | 30.0% of reviews — better |
| Number of ratings | 2 — better | — |
| Update frequency | Every 5 weeks — better | Every 13 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPod, Apple Watch |
| Requires iOS | 11.0 | 11.0 |
| Further details — not scored | ||
| Size | 18 MB | 167 MB |
| Age rating | 4+ | 4+ |
| Developer | TIMEGUARD LTD | Thermogroup UK |
Customer experience
SupplyMaster
ThermoSphere
In-app purchases
SupplyMaster
No in-app purchases
ThermoSphere
No in-app purchases
Questions
Is SupplyMaster free?
Is ThermoSphere free?
Do SupplyMaster or ThermoSphere have ads?
Which is updated more often, SupplyMaster or ThermoSphere?
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