Comparison

PTI Transformer vs SKM Mobile

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

Head to head
About

PTI Transformer

This app calculates electrical transformer performance metrics like current, voltage, efficiency, and regulation. It also offers SI/Metric conversions for various physical quantities and includes a tool for estimating ship dates based on order time.

Highlights
  • Transformer current, voltage, efficiency, and regulation calculation
  • SI/Metric unit conversions
  • Speed, force, power, area, pressure, volume, temperature, weights & measures conversions
  • Ship date estimation tool
  • Information about the developer
Features
Read full description

PTI "Transform"er calculates electrical transformer current, phase voltage, efficiency & regulation at various loads and power factors and provides SI/Metric conversions for Speed, Force, Power, Area, Pressure, Volume, Temperature, Weights & Measures. A handy calculator for determining ship date from any date using weeks after order (ARO) is also included. Interesting facts about PTI and what we do appear as you navigate through the application. Disclaimer: All conversions if used for critical calculations should be verified with a secondary source.

About

SKM Mobile

Capture field data, view study results, and manage equipment settings on your mobile device. Seamlessly import information to your desktop program and enhance your workflow with on-the-go access to essential project details.

Highlights
  • Field data collection
  • View study results
  • Import data to desktop
  • Capture photos and videos
  • Scan QR codes
  • Scribble notes
Features
Read full description

This SKM Mobile app requires a $299 USD/year subscription to use. Take SKM on the go! The SKM Mobile app provides an intuitive experience that lets you quickly and easily collect data from the field and seamlessly import it to your PTW desktop program! You can also view study results on your phone or tablet - such as what arc flash PPE to wear or to verify equipment settings! View onlines, take pictures, videos, scan QR codes, scribble notes, and more! Your subscription will be charged to your iTunes account at confirmation of purchase and will automatically renew (at the duration selected) unless auto-renew is turned off at least 24 hours before the end of the current period. The current subscription may not be canceled during the active subscription period; however, you can manage your subscription and/or turn off auto-renewal by visiting your iTunes Account Settings after purchase. Terms of use: https://skm.com/terms-of-use.html Privacy policy: https://www.skm.com/privacy.html

Screenshots

PTI Transformer4 screens
SKM Mobile4 screens

Verdict

The call

The clearest difference is rating: PTI Transformer at 5.0 against SKM Mobile's 3.0. PTI Transformer also leads on in-app purchases (none vs 1). SKM Mobile's advantage is ratings volume (3 vs 1). On price, update cadence, ads 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. SKM Mobile sells 1 in-app purchase, starting at $299.99 per year. PTI Transformer asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

PTI Transformer holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 1 and 3 respectively.

UpkeepUpdate frequency

PTI Transformer ships an update every 11 months, SKM Mobile every 7 months. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

Scorecard4 real differences · 5 level
PTI Transformer versus SKM Mobile: the parameters behind the verdict, then further details
ParameterPTI TransformerSKM Mobile
PriceFreeFree
Rating5.0 (1 ratings) — better3.0 (3 ratings)
Number of ratings13 — better
Update frequencyEvery 11 monthsEvery 7 months — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterSubscription
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS12.0 — better12.2
Further details — not scored
Size3 MB132 MB
Age rating4+4+
DeveloperPush Interactions, Inc.S.K.M. SYSTEMS ANALYSIS, INC.

Customer experience

PTI Transformer

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

SKM Mobile

All ratings3 ratings
Positive66.7%
Neutral0.0%
Negative33.3%

In-app purchases

None

PTI Transformer

No in-app purchases

1 purchases

SKM Mobile

Subscriptions1
  • SKM Mobile Subscription$299.991 Year

Questions

Is PTI Transformer free?
PTI Transformer is free to download, with no in-app purchases.
Is SKM Mobile free?
SKM Mobile is free to download, with in-app purchases available.
Which has better reviews, PTI Transformer or SKM Mobile?
PTI Transformer is rated higher. PTI Transformer averages 5.0 out of 5 from 1 ratings, while SKM Mobile averages 3.0 from 3 ratings.
Do PTI Transformer or SKM Mobile have ads?
Neither PTI Transformer nor SKM Mobile shows ads.
Which is updated more often, PTI Transformer or SKM Mobile?
PTI Transformer ships an update every 11 months, and SKM Mobile every 7 months. Most recently, PTI Transformer was updated on November 1, 2026 and SKM Mobile on November 3, 2026.

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