Comparison

IS RT vs Weldwise

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
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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

Weldwise

Features
Read full description

Stop guessing your welder settings. Weldwise gives you a clean starting point for MIG, TIG, Stick and flux-core in seconds. Pick your process, material and thickness and get recommended amperage, voltage, wire or electrode size, wire feed speed, shielding gas and polarity. FREE - Settings finder: MIG, TIG, Stick and flux-core on mild steel, stainless and aluminum - Saved setups: keep a result with the volts and wire speed you actually ran, then load it again in one tap — or share it with your crew - Sheet gauge from 24 to 7 ga, using the right table for steel, stainless and aluminum - Weld symbols chart, drawn to AWS A2.4, with the ISO 2553 dashed line explained - Position and what's on hand: flat, horizontal, vertical or overhead, and the wire, rod or tungsten you actually have — with gas flow, filler classification, TIG cup size and AC balance - Symbol quiz: ten symbols, four answers each — beat your best - Dual shield and metal-core alongside MIG, TIG, Stick and self-shielded — with rod and wire amperage by diameter, from 0.023 in wire to 3/16 in rod - Heat input calculator in kJ/mm or kJ/in, with the arc efficiency factor that codes such as AWS D1.1 and ISO/TR 18491 ask for - Reference charts: electrodes, shielding gases, polarity, tungsten types and the fix for every common weld fault - Full metric and imperial, in 11 languages - Works on iPhone and iPad, fully offline, with no account and no ads WELDWISE PRO (one-time purchase, no subscription) - Shielding gas calculator: usage per job and what the cylinder actually costs - Filler metal calculator: deposited weight, how much to buy once stub-end and spatter loss are counted, and the cost in your own currency - Groove and pipe joints: weld metal and filler per joint for V, bevel, double V and square butt welds on plate or pipe, with the joint drawn to scale - Filler metal selector: the AWS filler for any pair of base metals, stainless to carbon steel and cast iron included - Cooling time t8/5 to EN 1011-2, right under your heat input - Back purge: time and gas to purge a stainless or titanium pipe root - Preheat and carbon equivalent: CE (IIW) and Pcm from the steel grade or your own mill certificate, with the preheat and maximum interpass temperature the joint calls for - Fillet weld size and strength: effective throat, allowable load per inch and for the whole run, and whether your leg size clears the code minimum for that thickness - Every future Pro tool included: pay once, yours forever Built by an independent developer for people who actually weld. Every value is a starting point. Always confirm against your WPS, the machine chart and a test coupon.

Screenshots

IS RT4 screens
Weldwise4 screens

Verdict

The call

The clearest difference is in-app purchases: IS RT at none against Weldwise's 1. Weldwise's advantage is update cadence (monthly vs every 5 months). On price, ads, device support and iOS requirement 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. Weldwise sells 1 one-off in-app purchase. IS RT asks for nothing beyond the download.

UpkeepUpdate frequency

IS RT ships an update every 5 months, Weldwise monthly. The most recent releases landed on October 4, 2026 and October 16, 2026 respectively.

Scorecard2 real differences · 4 level
IS RT versus Weldwise: the parameters behind the verdict, then further details
ParameterIS RTWeldwise
PriceFreeFree
Update frequencyEvery 5 monthsMonthly — better
AdsNoNo
In-app purchasesNo — betterYes
DevicesiPhone, iPodiPhone, iPad
Requires iOS15.6 — better16.0
Further details — not scored
Size28 MB2 MB
Age rating17+4+
DeveloperInstitut de SoudureENES AYKUT AYDEMIR

In-app purchases

None

IS RT

No in-app purchases

1 purchases

Weldwise

One-time1
  • Weldwise Pro$6.99

Questions

Is IS RT free?
IS RT is free to download, with no in-app purchases.
Is Weldwise free?
Weldwise is free to download, with in-app purchases available.
Do IS RT or Weldwise have ads?
Neither IS RT nor Weldwise shows ads.
Which is updated more often, IS RT or Weldwise?
IS RT ships an update every 5 months, and Weldwise monthly. Most recently, IS RT was updated on October 4, 2026 and Weldwise on October 16, 2026.

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