# SupplyMaster vs ThermoSphere

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.

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.

## The numbers

| Metric | SupplyMaster | ThermoSphere |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (2 ratings)](https://appshunter.io/ios/app/supplymaster/id1204680294/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 11.4% of reviews | **30.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 13 months |
| Monetization | Free | Free |
| Size | 18 MB | 167 MB |
| Requires iOS | 11.0 | 11.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPod, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [TIMEGUARD LTD](https://appshunter.io/developer/1204680293) | [Thermogroup UK](https://appshunter.io/developer/915777303) |

## What reviewers say

### SupplyMaster

[App page](https://appshunter.io/ios/app/supplymaster/id1204680294)

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.

**Highlights:** Remote programming, Energy saving, Auto, Permanent Off, Permanent On modes, Holiday mode, Advance and Boost functions

**Features:** macOS Compatibility

**In-app purchases:** none


### ThermoSphere

[App page](https://appshunter.io/ios/app/thermosphere/id1435864290)

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.

**Highlights:** Remote device control, Heating schedule creation, Manual control options, Access device settings, Compatible with various ThermoSphere devices

**In-app purchases:** none


## Frequently asked questions

### Is SupplyMaster free?

SupplyMaster is free to download, with no in-app purchases.

### Is ThermoSphere free?

ThermoSphere is free to download, with no in-app purchases.

### Do SupplyMaster or ThermoSphere have ads?

Neither SupplyMaster nor ThermoSphere shows ads.

### Which is updated more often, SupplyMaster or ThermoSphere?

SupplyMaster ships an update every 5 weeks, and ThermoSphere every 13 months. Most recently, SupplyMaster was updated on October 7, 2026 and ThermoSphere on September 29, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*