Comparison

SmarTech vs Desired Resistance Calculator

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

Head to head
About

SmarTech

This app connects to a digital manifold to display accurate pressure and temperature readings. It offers real-time Superheat and Subcooling calculations, supports over 109 refrigerants, and features a "Smart Charge Zone" for optimal system charging. Users can also generate and export system performance reports.

Highlights
  • Real-time pressure and temperature readings
  • Superheat and Subcooling calculations
  • 109+ refrigerant types supported
  • Smart Charge Zone indicator
  • System performance reporting
  • PDF/CSV report export
Features
Read full description

The Uniweld SmarTech™ Digital Manifold App communicates with your SmarTech™ Digital Manifold to clearly display professionally accurate pressure and temperature readings in the palm of your hand. Monitor target and actual Superheat and Subcooling calculations in real-time, as pressure and temperature readings fluctuate. Choose from over 109 different refrigerant types and create a custom list of your most commonly used refrigerants. SMART CHARGE ZONE: All the guess work is taken out of properly charging the system with the color coded Smart Charge Zone feature. The difference between the target and actual Superheat or Subcooling is shown with color indicators that signal whether the system is overcharged (RED), undercharged (BLUE), or has an accurate "In The Zone" system charge (GREEN). REPORTING: Take your business to the next level with system performance reporting. Enter company details along with customer and equipment information and with one touch, produce a SmarTech™ Verified System Performance Report that is ready for export as a PDF or CSV file. Reports can easily be emailed for saving, tracking, or printing. Uniweld Products, Inc... "Quality Tools That Go To Work With You®". This app also works as a free, stand-alone P/T Calculator!

About

Desired Resistance Calculator

This tool helps you find the closest standard resistor value by combining two standard resistors in series or parallel. It supports E12 and E24 resistor series for precise calculations.

Highlights
  • Calculates series resistor combinations
  • Calculates parallel resistor combinations
  • Supports E12 resistor series
  • Supports E24 resistor series
  • Finds closest approximation to desired value
Features
Read full description

When you need a non-standard resistor value it can be achieved by series or parallel connection of two standard resistors. But calculating all possible combinations is a time-consuming task. This tool calculates, which two standard resistors, series or parallel connection gives a closer approximation to a desired value of resistance using E12 (10%) or E24 (5%) series of resistors.

Screenshots

SmarTech3 screens
Desired Resistance Calculator3 screens

Verdict

The call

The clearest difference is review sentiment: Desired Resistance Calculator at 100% against SmarTech's 25%. SmarTech's advantage is price (Free vs $1.99). On update cadence, ads, in-app purchases 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

SmarTech is free to download; Desired Resistance Calculator costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

SmarTech ships an update every 12 months, Desired Resistance Calculator every 10 months. The most recent releases landed on October 24, 2026 and October 13, 2026 respectively.

Scorecard3 real differences · 7 level
SmarTech versus Desired Resistance Calculator: the parameters behind the verdict, then further details
ParameterSmarTechDesired Resistance Calculator
PriceFree — better$1.99
Rating3.6 (9 ratings) — better—
Positive reviews25.0% of reviews100.0% of reviews — better
Number of ratings9 — better—
Update frequencyEvery 12 monthsEvery 10 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree — betterPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod, Mac — better
Requires iOS15.614.4 — better
Further details — not scored
Size21 MB1 MB
Age rating4+4+
DeveloperUniweld Products, Inc.Ekrem Nurdag

Customer experience

SmarTech

All ratings9 ratings
Positive55.6%
Neutral11.1%
Negative33.3%
Written reviews4 reviews
Positive25.0%
Neutral25.0%
Negative50.0%

Desired Resistance Calculator

Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

SmarTech

No in-app purchases

None

Desired Resistance Calculator

No in-app purchases

Questions

Is SmarTech free?
SmarTech is free to download, with no in-app purchases.
Is Desired Resistance Calculator free?
Desired Resistance Calculator costs $1.99, with no in-app purchases.
Do SmarTech or Desired Resistance Calculator have ads?
Neither SmarTech nor Desired Resistance Calculator shows ads.
Which is updated more often, SmarTech or Desired Resistance Calculator?
SmarTech ships an update every 12 months, and Desired Resistance Calculator every 10 months. Most recently, SmarTech was updated on October 24, 2026 and Desired Resistance Calculator on October 13, 2026.

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