TSUN Smart vs WeldGauge
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
TSUN Smart
Monitor your solar power plants and devices from your mobile. Track real-time and historical generation data, calculate yield, and visualize individual panel performance with a custom layout.
- Manage multiple solar plants
- Add and configure devices
- View real-time generation data
- Review historical generation data
- Calculate solar yield
- Build solar panel layouts
- Monitor individual panel performance
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TSUN Smart is a solar plant mornitoring application used by endusers or installers for TSUN products. You are able to manage different plants, add devices, configure the devices in batch, review real-time and historic generation data as well calculate your yield on your mobile phone. In addition, you are able to build a layout of your solar panels and mornitor the perfomance of each panel individually.
WeldGauge
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WeldGauge turns your iPhone into a portable weld inspection station. Capture a photo of any weld, calibrate it against a known reference, and measure imperfections directly on-screen — with instant pass/fail evaluation against EN ISO 5817. WHAT MAKES WELDGAUGE UNIQUE Unlike generic measurement or photo annotation apps, WeldGauge is purpose-built for welding quality control. It combines calibrated dimensional measurement with built-in welding standards evaluation in a single workflow — something previously only possible with dedicated lab equipment or desktop software. CAPTURE & IMPORT • Built-in camera with up to 20× zoom for close-up weld detail • Import existing photos from your library • Automatic background removal to isolate the weld profile • 45° rotation for angled weld orientations CALIBRATE • Place any known reference (ruler, gauge block, coin) in the photo • Draw a calibration line and enter the real-world dimension • The app calculates a precise pixel-to-millimeter ratio • Re-calibrate anytime without losing measurements MEASURE • Tap to measure linear distances on the calibrated image • Measure reinforcement height, undercut depth, misalignment, throat thickness, and more • Pan, zoom, and rotate freely while measuring • Edge detection overlay highlights weld boundaries automatically EVALUATE AGAINST EN ISO 5817 • Select the imperfection type (502, 504, 507, 508, 5011, 5213, 512) • Enter wall thickness and weld width • Instant evaluation against quality levels B, C, and D • Clear pass/fail result for each level • Built-in reference guide with illustrations for every imperfection type PIPE FITTINGS LIBRARY • Searchable database of standard pipe fittings (elbows, tees, reducers, caps) • Dimensions and specifications for quick field reference • Filter by type and nominal size PROJECT MANAGEMENT • Organize inspections into projects with metadata • Store weld number, location, welder ID, and notes • Multiple measurements per project • All data persists locally — nothing is uploaded EXPORT & REPORTING • Export measurement results as structured reports • Share annotated photos with measurement overlays • PDF and CSV output for documentation FULLY OFFLINE & PRIVATE • Every feature works without an internet connection • Zero data collection — no analytics, no tracking, no accounts • All photos and data stay on your device • Perfect for field inspections in remote locations WHO IS IT FOR • Welding inspectors (CWI, IWI, CSWIP) • Quality control engineers • Fabrication shop supervisors • Welding students and trainees • Anyone who needs quick, standards-based weld evaluation on site WeldGauge replaces the workflow of "take a photo → transfer to PC → open CAD software → measure → look up the standard → calculate." Now it's one app, one device, one minute.
Screenshots
Verdict
The clearest difference is price: TSUN Smart at Free against WeldGauge's $4.99. TSUN Smart also leads on iOS requirement (15.6 vs 17.0). WeldGauge's advantage is update cadence (every 2 weeks vs every 6 weeks). On ads, in-app purchases 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
TSUN Smart is free to download; WeldGauge costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.
TSUN Smart ships an update every 6 weeks, WeldGauge every 2 weeks. The most recent releases landed on October 25, 2026 and October 4, 2026 respectively.
| Parameter | TSUN Smart | WeldGauge |
|---|---|---|
| Price | Free — better | $4.99 |
| Rating | 5.0 (1 ratings) — better | — |
| Positive reviews | 18.1% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 6 weeks | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 15.6 — better | 17.0 |
| Further details — not scored | ||
| Size | 69 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | TSUNESS Co., Ltd | 宁 王 |
Bugs and requests
TSUN Smart
Reported bugs
15 issues- Server connection failures preventing data display
- Missing daily energy data in monthly summaries
- Incorrect total energy calculations
- Data frozen or not updating in real-time
- App crashes or fails to load
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- Verification code not sent during registration
- Inverter configuration mode issues
- Smart Meter integration causing system type changes
- Synchronization problems with multiple micro-inverters
- Daily counter resets losing historical data
- Inconsistent power readings between panels on same roof
- Connection drops between 12-13 hours daily
- Data not recorded after app updates
- Inverter shows offline despite active production
- Micro-inverter pairing failures
Requested features
12 requests- Display daily peak power values consistently
- Real-time data updates on demand (pull-to-refresh)
- Export data in CSV format
- Show maximum inverter capacity information
- Email and push notifications for alerts
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- Ability to adjust power limits directly in app
- Display current firmware version
- Monthly and yearly energy generation summaries
- Larger chart labels and improved layout
- Support for 5GHz WiFi networks
- Improved German language translation
- Better error messages and user guidance
WeldGauge
Not enough reviews yet to summarise bugs or requests.
In-app purchases
TSUN Smart
No in-app purchases
WeldGauge
No in-app purchases









