# SupplyMaster vs Electrical Certificate App

The clearest difference is review sentiment: Electrical Certificate App at 54% against SupplyMaster's 11%. Electrical Certificate App also leads on update cadence (every 2 weeks vs every 5 weeks). SupplyMaster's advantage is in-app purchases (none vs 2) and iOS requirement (11.0 vs 15.6). On price, ads and device support there is nothing between them.

Both are free to download. Electrical Certificate App sells 2 in-app purchases, starting at $19.99 per month. SupplyMaster asks for nothing beyond the download.

SupplyMaster ships an update every 5 weeks, Electrical Certificate App every 2 weeks. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | SupplyMaster | Electrical Certificate App |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.7 (3 ratings)](https://appshunter.io/ios/app/supplymaster/id1204680294/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 11.4% of reviews | **53.8% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 2 weeks** |
| Monetization | **Free** | Subscription |
| Size | 18 MB | 47 MB |
| Requires iOS | **11.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [TIMEGUARD LTD](https://appshunter.io/developer/1204680293) | [Trade Apps LTD](https://appshunter.io/developer/1293890969) |

## 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


### Electrical Certificate App

[App page](https://appshunter.io/ios/app/electrical-certificate-app/id1531731405)

This app helps electrical engineers generate various types of certificates, manage customer information, and create invoices. It offers secure data storage and syncs with a desktop application for seamless workflow management.

**Highlights:** Generate BS7671 electrical certificates, Create invoices and estimates, Customer relationship management (CRM), Auto-save and cloud sync, Add custom branding to certificates, Secure data encryption

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $19.99 | per month |
| yearly Subscription | $199.99 | per year |


## Frequently asked questions

### Is SupplyMaster free?

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

### Is Electrical Certificate App free?

Electrical Certificate App is free to download, with in-app purchases available.

### Do SupplyMaster or Electrical Certificate App have ads?

Neither SupplyMaster nor Electrical Certificate App shows ads.

### Which is updated more often, SupplyMaster or Electrical Certificate App?

SupplyMaster ships an update every 5 weeks, and Electrical Certificate App every 2 weeks. Most recently, SupplyMaster was updated on November 2, 2026 and Electrical Certificate App on November 3, 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.*