Comparison

SUN vs WeldOffice

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

Head to head
About

SUN

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The SUN-TEC Hardness Converter is a tool for converting data from one hardness scale to another scale(s) and measuring the hardness of Metallic materials for your applications. Features and Benefits: - Convert between Rockwell, Vickers, Knoop, Brinell, and Leeb hardness scales. - Minimum Thickness and Cylindrical corrections for Rockwell scales. - Diagonal Length(s) conversion to Hardness and Hardness to Diagonal Length(s) for Vickers, Knoop, and Brinell scales. Available Scales: - HRA - HRB - HRC - HRD - HRF - HR15N - HR30N - HR45N - HR15T - HR30T - HR45T - VICKERS - KNOOP - BRINELL - LEEB (HLD) Note: All information within this application tool is for reference only.

About

WeldOffice

Features
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Use WeldOffice mobile app for reliable determination of compliance with welding codes & standards. The app comes with multi-code search features including material classifications for base metals and filler metals, definitions of welding and brazing terms, interpretations, as well as requirements identification based on test type, applicability of welding process and the type of variable. This single WeldOffice mobile app integrates previous individually published P Numbers, M Numbers and F Numbers apps with exclusive access apps addressing multi-code welding requirements. The app includes comprehensive UNS search tool. Multi-code searches include the following Standards Developing Organizations (SDOs): ASME, AWS, API, ISO.... AA, AAR, ABS, ACI, AISI, AMS, AS, AS/NZS, ASTM, CSA, DIN, EN, FED, GB, IRAM, IS, JIS, MIL, MSS, NACE, SAE. INTEGRATED APPS - P-Numbers and M-Numbers apps provide quick lookup of base metal weldability grouping numbers for welding procedure and performance qualification. Data is provided by C-spec from the master source used for generation, proof-reading and maintenance of ASME Section IX Table QW/QB-422, AWS B2.1 Table C1 and C2, and ISO/TR 20173. - F-Numbers app provides quick lookup of filler metal groupings for welding procedure and performance qualification. Lookup includes classifications with respective descriptions of intended use. Data is provided by C-spec. F-numbers and A-numbers assignments are based on ASME Section IX Table QW-432 and QW-442, ASME Section II Part C, AWS B2.1 Table B1 and B2, and AWS A5.1 through AWS A5.36. - A-Numbers app calculator determines the A-Number and the type of weld deposit per ASME Section IX Table QW-442. - UNS app searches materials classified in the SAE Unified Numbering System. - ISO 15608 app searches base metals in ISO/TR 20172, ISO/TR 20173 and ISO/TR 20174. - AWS D1.1 Base metals app searches base metals permitted for use with the AWS D1.1 Structural Steel Code. - Term Definitions app compares API, ASME, AWS and ISO published definitions of welding and brazing terms. - Interpretations app searches API, ASME and AWS published interpretations. - Turbo Code app identifies ASME Section IX code requirements based on applicability of test type, welding process and type of variable (essential, supplementary essential and nonessential).

Screenshots

SUN4 screens
WeldOffice4 screens

Verdict

The call

The clearest difference is update cadence: WeldOffice at every 3 months against SUN's every 14 months. WeldOffice also leads on device support. SUN's advantage is iOS requirement (13.4 vs 16.6). On price and in-app purchases there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

SUN ships an update every 14 months, WeldOffice every 3 months. The most recent releases landed on October 11, 2026 and October 7, 2026 respectively.

Scorecard3 real differences ยท 3 level
SUN versus WeldOffice: the parameters behind the verdict, then further details
ParameterSUNWeldOffice
PriceFreeFree
Update frequencyEvery 14 monthsEvery 3 months โ€” better
Adsโ€”No
In-app purchasesNoNo
Devicesโ€”iPhone, iPad, iPod โ€” better
Requires iOS13.4 โ€” better16.6
Further details โ€” not scored
Size24 MB20 MB
Age rating17+4+
DeveloperSUN-TEC CORPORATIONASMEIX CORPORATION

In-app purchases

None

SUN

No in-app purchases

None

WeldOffice

No in-app purchases

Questions

Is SUN free?
SUN is free to download, with no in-app purchases.
Is WeldOffice free?
WeldOffice is free to download, with no in-app purchases.
Which is updated more often, SUN or WeldOffice?
SUN ships an update every 14 months, and WeldOffice every 3 months. Most recently, SUN was updated on October 11, 2026 and WeldOffice on October 7, 2026.

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