SupplyMaster vs PAT Test Pro
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.
PAT Test Pro
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.
- 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
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PAT Test Pro — intelligent portable appliance testing on iPhone, iPad and Mac. Built by iCertifi for electricians and electrical contractors who want PAT testing finished on site, not typed up later. Scan, test, certify, email — before you leave the building. WHY ELECTRICIANS SWITCH • Unlimited appliances and unlimited certificates — no per-item or per-cert charges • Works offline; everything syncs the moment you are back on signal • Start on iPhone, continue on iPad, finish on Mac — one account, one dataset • No PC, no third-party desktop software, no manual transfers SMART BARCODE SCANNING Scan an appliance ID and its details fill themselves in. Return to a site months later, scan the same item, and every previously saved detail — make, model, location, class, previous results — populates instantly. No duplicate entry, no re-typing. APPLIANCE PASSPORT Every appliance carries its own history. Tap any item in Scannable Appliances, or the History button on the test form, to see every test ever recorded against that Appliance ID: dates, certificates, pass/fail results, readings and photos. Ideal for client queries and repeat contracts. AI APPLIANCE SCANNING Point the camera at an appliance and let the AI carry out the visual inspection. It records every defect found, its severity and the reasoning, and saves the findings alongside the test — ready-made evidence for failed items, remedial quotes and client disputes. RETEST DATES THAT CHASE THEMSELVES Set retest intervals per appliance or per site. Upcoming retests appear on your home screen, so recurring work comes back to you instead of quietly expiring. PROFESSIONAL CERTIFICATES Generate clean, fully compliant PAT test certificates carrying your company details, logo, retest date and digital signature. Choose your certificate colour. Email straight to the client as a secure PDF, or keep it in the cloud. BUILT FOR IN-SERVICE INSPECTION AND TESTING • Built-in database of common appliances for fast, accurate entry • Pass, fail and remedial recording with photo evidence • An asset register that builds itself as you test • Automatic certificate and page handling — no page limits to manage • Class I, Class II, extension lead and IEC lead testing • Suits offices, schools, landlords, HMOs, hotels, construction sites and portfolio contracts BOOKKEEPING BUILT IN Every completed appliance can raise a draft invoice in Mint Books automatically — invoicing, quotations and Making Tax Digital compliance without leaving the job. SECURE CLOUD, NOT A SPREADSHEET Industry-leading cloud infrastructure with end-to-end encryption and redundant storage. Your data is private, backed up and accessible only to you — even if a device is lost, stolen or replaced. SUBSCRIPTION An auto-renewing subscription is required to send and save PAT testing certificates and to use cloud storage. Payment is charged to your iTunes account at confirmation of purchase. The subscription renews automatically unless auto-renew is turned off at least 24 hours before the end of the current period, and your account is charged for renewal within 24 hours prior to the end of the current period. Manage or cancel at any time in your Account Settings. Terms of Use https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy https://icertifi.zendesk.com/hc/en-us/articles/201659279-iCertifi-s-Privacy-Policy-GDPR-Compliance
Screenshots
Verdict
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.
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. 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 September 29, 2026 and September 27, 2026 respectively.
| Parameter | SupplyMaster | PAT Test Pro |
|---|---|---|
| Price | Free | Free |
| Rating | 3.0 (2 ratings) — better | — |
| Positive reviews | 11.4% of reviews — better | 0.0% of reviews |
| Number of ratings | 2 — better | — |
| Update frequency | Every 5 weeks | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Subscription |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 11.0 — better | 18.6 |
| Further details — not scored | ||
| Size | 18 MB | 114 MB |
| Age rating | 4+ | 4+ |
| Developer | TIMEGUARD LTD | iCertifi |
Customer experience
SupplyMaster
PAT Test Pro
In-app purchases
SupplyMaster
No in-app purchases
PAT Test Pro
- 1 Month Subscription7 Days trial$24.991 Month
- PAT Test Pro7 Days trial$119.991 Year
- PAT Test Pro$349.001 Year
- 50 AI$4.99
- 250 Appliance Scan credits$19.99
- 1000 AI Credits$39.99
Questions
Is SupplyMaster free?
Is PAT Test Pro free?
Do SupplyMaster or PAT Test Pro have ads?
Which is updated more often, SupplyMaster or PAT Test Pro?
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