TC66C vs USB
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
TC66C
Connect to a Type-C tester via Bluetooth to view and control its data. This utility app allows for real-time monitoring and management of tester functions directly from your device.
- Bluetooth connectivity
- Type-C tester data display
- Tester control functions
- Real-time monitoring
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Data display and control of the tester by connecting the Type-C tester via Bluetooth
USB
This tool connects to U.S. Boiler modulating condensing boilers via a Bluetooth adapter for commissioning, diagnostics, and service. It offers wizards for startup and troubleshooting, data logging, and remote support capabilities through a web portal.
- Bluetooth connectivity to boilers
- Commissioning, diagnostic, and service functions
- Startup, troubleshoot, and service wizards
- Cloud data logging and reporting
- Remote support via web portal
- Boiler firmware and parameter updates
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USB-Connect is a commissioning, diagnostic and service tool consisting of a Bluetooth Adaptor and mobile device app. The app communicates with any U.S. Boiler modulating condensing boiler. USB-Connect is a local service tool with web portal data collection and live streaming to enable remote support. Compatible Boilers include Alpine, Alta, AltaC, Aspen, AspenC, K2WT, K2WTC, K2FT and XC Modulating Condensing Boilers. USB-Connect Features: • Bluetooth Adaptor connects boiler to USB-Connect App. • English and Spanish Language. • Start-up, Troubleshoot and Service Wizards. • Data logs, site photos, service & status reports sent to cloud. • Alta Boiler Control firmware and default parameter updates.
Screenshots
Verdict
The clearest difference is rating: USB at 4.4 against TC66C's 2.0. USB also leads on review sentiment (75% vs 33%) and update cadence (monthly vs every 2 months). TC66C's advantage is iOS requirement (9.0 vs 13.0). On price, ratings volume, ads and in-app purchases 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.
USB holds the better App Store score, 4.4 against 2.0. Both are backed by a comparable volume of ratings — 6 and 16 respectively. Written reviews point the same way: 33% of TC66C's written reviews are positive against 75% of USB's.
TC66C ships an update every 2 months, USB monthly. The most recent releases landed on October 16, 2026 and October 24, 2026 respectively.
| Parameter | TC66C | USB |
|---|---|---|
| Price | Free | Free |
| Rating | 2.0 (6 ratings) | 4.4 (16 ratings) — better |
| Positive reviews | 33.3% of reviews | 75.0% of reviews — better |
| Number of ratings | 6 | 16 — better |
| Update frequency | Every 2 months | Monthly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 9.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 37 MB | 74 MB |
| Age rating | 4+ | 4+ |
| Developer | 亮亮 刘 | U.S. Boiler Company, LLC. |
Customer experience
TC66C
USB
In-app purchases
TC66C
No in-app purchases
USB
No in-app purchases
