# SupplyMaster vs PAT Test Pro

The clearest difference is in-app purchases: SupplyMaster at none against PAT Test Pro's 6. SupplyMaster also leads on review sentiment (11% vs 0%) and iOS requirement (11.0 vs 18.6). PAT Test Pro's advantage is update cadence (every 2 weeks vs every 5 weeks). On price, ads and device support there is nothing between them.

Both are free to download. PAT Test Pro sells 6 in-app purchases, starting at $24.99 per month. SupplyMaster asks for nothing beyond the download.

SupplyMaster ships an update every 5 weeks, PAT Test Pro every 2 weeks. The most recent releases landed on October 7, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | SupplyMaster | PAT Test Pro |
| --- | --- | --- |
| 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** | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 2 weeks** |
| Monetization | **Free** | Subscription |
| Size | 18 MB | 115 MB |
| Requires iOS | **11.0** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [TIMEGUARD LTD](https://appshunter.io/developer/1204680293) | [iCertifi](https://appshunter.io/developer/490104127) |

## 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


### PAT Test Pro

[App page](https://appshunter.io/ios/app/pat-test-pro/id6746668717)

Streamline portable appliance testing with intelligent cloud sync and advanced barcode scanning. Generate professional, compliant certificates instantly for your clients. Designed for electrical contractors seeking efficiency and mobility.

**Highlights:** Seamless cloud sync across Apple devices, Advanced barcode scanning for auto-fill, Unlimited appliance and certificate testing, Instant, professional, compliant certification, Customizable certificate colors and company branding, Built-in database of common appliances

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 Month Subscription | $24.99 | per month |
| PAT Test Pro | $119.99 | per year |
| PAT Test Pro | $349.00 | per year |
| 50 AI | $4.99 | one-time |
| 250 Appliance Scan credits | $19.99 | one-time |
| 1000 AI Credits | $39.99 | one-time |


## Frequently asked questions

### Is SupplyMaster free?

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

### Is PAT Test Pro free?

PAT Test Pro is free to download, with in-app purchases available.

### Do SupplyMaster or PAT Test Pro have ads?

Neither SupplyMaster nor PAT Test Pro shows ads.

### Which is updated more often, SupplyMaster or PAT Test Pro?

SupplyMaster ships an update every 5 weeks, and PAT Test Pro every 2 weeks. Most recently, SupplyMaster was updated on October 7, 2026 and PAT Test Pro on October 5, 2026.

---

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