Transformer Calculator. vs VFD Cable Sizing Calc
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Transformer Calculator.
This app simplifies transformer calculations for engineers and students. It accurately computes primary and secondary currents, turns ratios, and secondary voltages based on user inputs for transformer ratings and winding turns.
- Primary and secondary current calculations
- Turns ratio determination
- Transformer type identification
- Secondary voltage calculation
- Supports 1Φ and 3Φ phases
- User-friendly interface
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Transformer Calculator: A user-friendly app for Current and Voltage Calculations. Current Calculations • Calculate primary and secondary full-load currents. • Determine the turns ratio and transformer type. How it works: 1. Select the phase type (1Φ or 3Φ). 2. Input transformer ratings (VA/kVA) and primary/secondary voltages. Outputs: • Primary full-load current • Secondary full-load current • Turns Ratio: N1 / N2 = V1 / V2 = I2/ I1 Voltage Calculations How it works: 1. Enter Number of turns in the primary and secondary windings 2. Input Primary voltage Outputs: • Secondary voltage • Turns Ratio: N1 / N2 = V1 / V2 = I2/ I1 Effortless and Accurate: Perfect for engineers and students to compute transformer parameters precisely.
VFD Cable Sizing Calc
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Use this simple tool to input relevant information for your installation of cable from VFD (variable-frequency drive) to Motor and it will select the proper size of cable for your installation.
Screenshots
Verdict
The clearest difference is in-app purchases: VFD Cable Sizing Calc at none against Transformer Calculator.'s 1. VFD Cable Sizing Calc also leads on ads (none vs shown). On price, update cadence, 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
Both are free to download. Transformer Calculator. sells 1 one-off in-app purchase. VFD Cable Sizing Calc asks for nothing beyond the download.
Both ship on a similar rhythm, roughly every 4 months. The most recent releases landed on September 18, 2026 and March 8, 2026 respectively.
| Parameter | Transformer Calculator. | VFD Cable Sizing Calc |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (47 ratings) — better | — |
| Number of ratings | 47 — better | — |
| Update frequency | Every 4 months | Every 4 months |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 17.6 | 16.0 — better |
| Further details — not scored | ||
| Size | 41 MB | 5 MB |
| Age rating | 4+ | 17+ |
| Developer | V PUGAZHENTHI | Southwire Company |
In-app purchases
Transformer Calculator.
- Go Pro$3.99
VFD Cable Sizing Calc
No in-app purchases
Questions
Is Transformer Calculator. free?
Is VFD Cable Sizing Calc free?
Do Transformer Calculator. or VFD Cable Sizing Calc have ads?
Which is updated more often, Transformer Calculator. or VFD Cable Sizing Calc?
Other comparisons
