Comparison

IS RT vs WeldMaster

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

Head to head
About

IS RT

Features
Read full description

IS RT vous permet d’accéder à plusieurs fonctionnalités, dont : - Calcul de temps de pose en Ir192 et Se75 - Estimation de la distance focale mini - Estimation du flou géométrique - Prise en compte des matériaux - Prise en compte des coefficients de rapidité des films IS RT provides access to several features, including: - Exposure time calculation for Ir192 and Se75 sources - Estimation of source-film minimal distance - Estimation of geometric unsharpness - Consideration of material types - Consideration of film speed coefficients (R-factor)

About

WeldMaster

Features
Read full description

WeldMaster gives starting-point welding settings for MIG, flux-core, stick and TIG, offline. Pick process, metal and thickness; get amps, volts, wire speed, gas flow and polarity. FREE • MIG (GMAW): mild steel, stainless and aluminum, every wire size and gas • Welding position: flat, vertical or overhead • Filler & Cost: weight and cost of a fillet weld • Gauge chart: gauge, inches and millimeters • 3 troubleshooting guides with bead diagrams • Imperial or metric units PRO (optional) • Flux-core (self-shielded and dual-shield), stick and TIG • Heat input with a travel-speed timer, preheat and carbon equivalent • Electrode chart and filler-metal selector • All 14 troubleshooting guides • My Setups: save the settings that worked • My Machine: see results on your own wire dial and voltage steps • No ads Weekly, monthly, yearly or pay-once plans. GOOD TO KNOW Every result is a range to start from: tune it to your machine, your material and your WPS. No machine models are built in. The app is not a substitute for a welding procedure or code requirements. Terms of Use: https://ghapps1.wordpress.com/terms-condition/ Privacy Policy: https://ghapps1.wordpress.com/privacy-policy/

Screenshots

IS RT4 screens
WeldMaster4 screens

Verdict

The call

The clearest difference is in-app purchases: IS RT at none against WeldMaster's 4. IS RT also leads on ads (none vs shown) and iOS requirement (15.6 vs 17.0). WeldMaster's advantage is update cadence (every 9 days vs every 5 months). On price 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

Both are free to download. WeldMaster sells 4 in-app purchases, starting at $0.99 per 7 days. IS RT asks for nothing beyond the download.

UpkeepUpdate frequency

IS RT ships an update every 5 months, WeldMaster every 9 days. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

Scorecard4 real differences · 2 level
IS RT versus WeldMaster: the parameters behind the verdict, then further details
ParameterIS RTWeldMaster
PriceFreeFree
Update frequencyEvery 5 monthsEvery 9 days — better
AdsNo — betterYes
In-app purchasesNo — betterYes
DevicesiPhone, iPod — betteriPhone
Requires iOS15.6 — better17.0
Further details — not scored
Size28 MB7 MB
Age rating17+4+
DeveloperInstitut de SoudureGrima Hdez

In-app purchases

None

IS RT

No in-app purchases

4 purchases

WeldMaster

Subscriptions3
  • WeldMaster Pro Weekly$0.997 Days
  • WeldMaster Pro Monthly$1.991 Month
  • WeldMaster Pro Yearly$2.991 Year
One-time1
  • WeldMaster Pro$4.99

Questions

Is IS RT free?
IS RT is free to download, with no in-app purchases.
Is WeldMaster free?
WeldMaster is free to download, with in-app purchases available.
Do IS RT or WeldMaster have ads?
WeldMaster shows ads; IS RT does not.
Which is updated more often, IS RT or WeldMaster?
IS RT ships an update every 5 months, and WeldMaster every 9 days. Most recently, IS RT was updated on October 25, 2026 and WeldMaster on October 24, 2026.

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