Comparison

TSUN Smart vs WeldGauge

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • 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
Features
Read full description

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.

About

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

TSUN Smart4 screens
WeldGauge4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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.

UpkeepUpdate frequency

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.

Scorecard3 real differences · 7 level
TSUN Smart versus WeldGauge: the parameters behind the verdict, then further details
ParameterTSUN SmartWeldGauge
PriceFree — better$4.99
Rating5.0 (1 ratings) — better—
Positive reviews18.1% of reviews—
Number of ratings1 — better—
Update frequencyEvery 6 weeksEvery 2 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPodiPhone, iPad
Requires iOS15.6 — better17.0
Further details — not scored
Size69 MB4 MB
Age rating4+4+
DeveloperTSUNESS 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
Show 10 more
  • 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
Show 7 more
  • 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

None

TSUN Smart

No in-app purchases

None

WeldGauge

No in-app purchases

Questions

Is TSUN Smart free?
TSUN Smart is free to download, with no in-app purchases.
Is WeldGauge free?
WeldGauge costs $4.99, with no in-app purchases.
Do TSUN Smart or WeldGauge have ads?
Neither TSUN Smart nor WeldGauge shows ads.
Which is updated more often, TSUN Smart or WeldGauge?
TSUN Smart ships an update every 6 weeks, and WeldGauge every 2 weeks. Most recently, TSUN Smart was updated on October 25, 2026 and WeldGauge on October 4, 2026.

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