SmarTech vs Desired Resistance Calculator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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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!
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.
- Calculates series resistor combinations
- Calculates parallel resistor combinations
- Supports E12 resistor series
- Supports E24 resistor series
- Finds closest approximation to desired value
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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
Verdict
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
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.
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.
| Parameter | SmarTech | Desired Resistance Calculator |
|---|---|---|
| Price | Free — better | $1.99 |
| Rating | 3.6 (9 ratings) — better | — |
| Positive reviews | 25.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 9 — better | — |
| Update frequency | Every 12 months | Every 10 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod, Mac — better |
| Requires iOS | 15.6 | 14.4 — better |
| Further details — not scored | ||
| Size | 21 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Uniweld Products, Inc. | Ekrem Nurdag |
Customer experience
SmarTech
Desired Resistance Calculator
In-app purchases
SmarTech
No in-app purchases
Desired Resistance Calculator
No in-app purchases
Questions
Is SmarTech free?
Is Desired Resistance Calculator free?
Do SmarTech or Desired Resistance Calculator have ads?
Which is updated more often, SmarTech or Desired Resistance Calculator?
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