Comparison

WeldCalc Pro vs Drw Tools

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

Head to head
About

WeldCalc Pro

Features
Read full description

WeldCalc Pro turns your iPhone into a complete welding calculator for every welder, fabricator, and engineer on the shop floor โ€” brand-neutral, 100% offline, no Wi-Fi required. Get accurate parameters for MIG/GMAW, TIG/GTAW, Stick/SMAW, and Flux-Cored/FCAW welding. Stop guessing your settings. Whether you're running a MIG welder on mild steel, TIG welding stainless, striking a 7018 rod, or dialing in flux-cored wire, WeldCalc Pro delivers the right amperage, voltage, wire feed speed, gas flow rate, and travel speed for your joint. WELDING CALCULATORS: - MIG/GMAW Calculator โ€” Voltage, wire feed speed, gas flow, and amperage for solid wire welding. Covers carbon steel, stainless steel, and aluminum across all common wire diameters. - TIG/GTAW Calculator โ€” Amperage, gas flow, tungsten size, and filler rod selection. Supports steel, stainless, aluminum, chromoly, and more. - Stick/SMAW Calculator โ€” Electrode selection, amperage ranges, polarity, and technique guidance. E6013 and E7018 are free; 6010, 6011, 7014, 7024 and the rest are Pro. - FCAW Calculator (Pro) โ€” Complete flux-cored welding parameters with self-shielded and gas-shielded wire data. REFERENCE TOOLS: - Preheat Calculator โ€” Required preheat temperature from material type, thickness, carbon equivalent, and welding process. Essential for structural and code work. - Heat Input Calculator โ€” Heat input from amperage, voltage, and travel speed. Critical for procedures that specify maximum heat input limits. - Amperage Charts โ€” Quick-reference amperage tables by material and thickness. A starter set is free; the complete tables are Pro. - Filler Metal Guide โ€” Match the right filler wire or rod to your base material combination, with AWS classifications. The first material group is free; the rest are Pro. - Gas Flow Guide โ€” Recommended shielding gas types and flow rates for every process and material. - Unit Converter โ€” Convert between metric and imperial welding units. YOUR DATA, YOUR WAY: - Calculation History โ€” Your last 3 calculations are free. Pro keeps every one of them, plus favorites. - 100% Offline โ€” No internet required. Every calculation runs on-device. Use it in the shop, on the pipe, or in the field with zero connectivity. - Imperial or Metric โ€” Enter thickness as 3/16" or 0.25 and get results in inches, ipm and cfh. - Light and Dark โ€” Both fully designed, for bright shop environments and outdoor glare. WHAT PRO UNLOCKS: The FCAW calculator, every stick electrode beyond E6013 and E7018, the complete amperage charts, the full filler metal guide, and unlimited calculation history with favorites โ€” plus every calculator and reference tool added in future. Everything else is free, forever: the MIG, TIG and Stick calculators, preheat, heat input, gas flow, the unit converter, and your last 3 calculations. Built for welders, by welders. WeldCalc Pro uses industry-standard formulas and AWS reference data โ€” not locked to any single brand or machine. From apprentice to CWI, this is the welding reference app that belongs in your pocket. Download WeldCalc Pro and get the right parameters โ€” every time. Terms of Use (EULA): https://weldcalcpro.volvoxmobile.com/weldcalcpro/terms Privacy Policy: https://weldcalcpro.volvoxmobile.com/weldcalcpro/privacy

About

Drw Tools

Features
Read full description

DRW Tools raccoglie in un'unica app i calcolatori essenziali per la messa a punto di motori a due tempi, pensati per preparatori, tuner e appassionati di motocross, kart e minimoto. Sei calcolatori, tutti offline e senza bisogno di account, organizzati in quattro sezioni: โ€ข Fasi โ€” calcolo delle fasature (travasi, scarico, ammissione) a partire da alesaggio, corsa e gradi di apertura/chiusura โ€ข Anticipo โ€” conversione tra gradi di anticipo all'accensione e millimetri prima del punto morto superiore โ€ข Miscela โ€” calcolo rapido delle proporzioni olio/benzina per qualsiasi rapporto di miscelazione โ€ข Testa โ€” tutto il necessario sulla camera di combustione in un'unica sezione: Volume Camera (volume netto e rapporto di compressione da cupola, banda di squish e cielo del pistone piatto/conico/bombato), Area Squish (percentuale/millimetri di banda, bidirezionale) e RDC (rapporto di compressione da un volume camera misurato, ad esempio con una siringa) Tutti i calcoli avvengono sul dispositivo: nessun dato viene raccolto, salvato online o condiviso con terzi.

Screenshots

WeldCalc Pro4 screens
Drw Tools4 screens

Verdict

The call

The clearest difference is in-app purchases: Drw Tools at none against WeldCalc Pro's 3. Drw Tools also leads on update cadence (every 3 days vs every 3 weeks) and device support (3 vs 1). On price and ads 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. WeldCalc Pro sells 3 in-app purchases, starting at $1.99 per 7 days. Drw Tools asks for nothing beyond the download.

UpkeepUpdate frequency

WeldCalc Pro ships an update every 3 weeks, Drw Tools every 3 days. The most recent releases landed on October 25, 2026 and October 31, 2026 respectively.

Scorecard4 real differences ยท 2 level
WeldCalc Pro versus Drw Tools: the parameters behind the verdict, then further details
ParameterWeldCalc ProDrw Tools
PriceFreeFree
Update frequencyEvery 3 weeksEvery 3 days โ€” better
AdsNoNo
In-app purchasesYesNo โ€” better
DevicesiPhoneiPhone, iPad, iPod โ€” better
Requires iOS17.015.0 โ€” better
Further details โ€” not scored
Size21 MB21 MB
Age rating4+4+
DeveloperErsel TarhanDotech di Soddu Simone

In-app purchases

3 purchases

WeldCalc Pro

Subscriptions2
  • Weekly Premium7 Days trial$1.997 Days
  • Annual Premium14 Days trial$19.991 Year
One-time1
  • WeldCalc Pro Lifetime$39.99
None

Drw Tools

No in-app purchases

Questions

Is WeldCalc Pro free?
WeldCalc Pro is free to download, with in-app purchases available.
Is Drw Tools free?
Drw Tools is free to download, with no in-app purchases.
Do WeldCalc Pro or Drw Tools have ads?
Neither WeldCalc Pro nor Drw Tools shows ads.
Which is updated more often, WeldCalc Pro or Drw Tools?
WeldCalc Pro ships an update every 3 weeks, and Drw Tools every 3 days. Most recently, WeldCalc Pro was updated on October 25, 2026 and Drw Tools on October 31, 2026.

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