Comparison

Transformer Calculator Plus vs Transformer Calculator.

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

Head to head
About

Transformer Calculator Plus

This utility app calculates key parameters for transformers, including voltage, current, and turns ratio. It helps determine if a transformer is step-up or step-down, essential for power conversion applications.

Highlights
  • Calculate primary and secondary voltage
  • Calculate primary and secondary current
  • Calculate transformer turns ratio
  • Determine step-up or step-down transformer
  • Supports AC voltage calculations
Features
Read full description

Transformer Calculator calculate any parameter within the transformer equation, including primary and secondary voltage, current, and turns. Transformer Calculations Include: Transformer Turns Ratio – Current and Turns Transformer Turns Ratio – Voltage and Turns Transformer Turns Ratio – Voltage and Current The result will indicate whether the transformer is step-up or step-down. Transformers are primarily used as power converters. The two types—step-up and step-down—operate on the same principle but in opposite directions. A step-up transformer converts a lower AC voltage to a higher voltage, while a step-down transformer reduces a higher AC voltage to a lower level. For example, if a country uses 110 V power, a step-up transformer converts it to 220 V, and a step-down transformer does the reverse. Both work with alternating current (AC). A transformer consists of a soft iron core with two coils wound around it, which are not electrically connected. These coils may be wound on separate limbs of the iron core or placed one over the other. The coil to which the alternating voltage is applied is called the primary coil or primary winding. When an alternating voltage is applied, the resulting alternating current in the primary winding generates a changing magnetic field. This changing field induces an alternating current in the secondary coil. The magnitude of the induced voltage depends on the number of turns in the secondary winding. All transformers have a nameplate rating. It is best to operate them within the voltage limits specified. Using a step-down transformer below its rated limit can support a wide range of applications, but exceeding the specified limit is dangerous and may cause electrical failure. The relationship between voltage, current, and the number of turns in each coil is given by: Vp/Vs = Np/Ns = Is/Ip Where: Vp – Primary voltage Vs – Secondary voltage Np – Primary turns Ns – Secondary turns Ip – Primary current Is – Secondary current Thank you for your support, and please visit nitrio.com for more apps for your iOS devices.

About

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.

Highlights
  • Primary and secondary current calculations
  • Turns ratio determination
  • Transformer type identification
  • Secondary voltage calculation
  • Supports 1Φ and 3Φ phases
  • User-friendly interface
Features
Read full description

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.

Screenshots

Transformer Calculator Plus4 screens
Transformer Calculator.4 screens

Verdict

The call

The clearest difference is price: Transformer Calculator. at Free against Transformer Calculator Plus's $2.99. Transformer Calculator. also leads on rating (4.8 vs 3.3) and update cadence (every 4 months vs every 45 months). Transformer Calculator Plus's advantage is in-app purchases (none vs 1) and ads (none vs shown). On 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

Transformer Calculator. is free to download; Transformer Calculator Plus costs $2.99 up front. Transformer Calculator. sells 1 one-off in-app purchase. Transformer Calculator Plus asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Transformer Calculator. holds the better App Store score, 4.8 against 3.3. That said, the two scores are not equally well evidenced: Transformer Calculator. has 49 ratings behind it against 4, so its average is the more settled of the two.

UpkeepUpdate frequency

Transformer Calculator Plus ships an update every 45 months, Transformer Calculator. every 4 months. The most recent releases landed on November 2, 2026 and November 4, 2026 respectively.

Scorecard8 real differences · 2 level
Transformer Calculator Plus versus Transformer Calculator.: the parameters behind the verdict, then further details
ParameterTransformer Calculator PlusTransformer Calculator.
Price$2.99Free — better
Rating3.3 (4 ratings)4.8 (49 ratings) — better
Positive reviews0.0% of reviews—
Number of ratings449 — better
Update frequencyEvery 45 monthsEvery 4 months — better
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS13.0 — better17.6
Further details — not scored
Size1 MB41 MB
Age rating4+4+
DeveloperNitrioV PUGAZHENTHI

Customer experience

Transformer Calculator Plus

All ratings4 ratings
Positive50.0%
Neutral0.0%
Negative50.0%
Written reviews2 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Transformer Calculator.

All ratings48 ratings
Positive97.9%
Neutral0.0%
Negative2.1%

In-app purchases

None

Transformer Calculator Plus

No in-app purchases

1 purchases

Transformer Calculator.

One-time1
  • Go Pro$3.99

Questions

Is Transformer Calculator Plus free?
Transformer Calculator Plus costs $2.99, with no in-app purchases.
Is Transformer Calculator. free?
Transformer Calculator. is free to download, with in-app purchases available.
Which has better reviews, Transformer Calculator Plus or Transformer Calculator.?
Transformer Calculator. is rated higher. Transformer Calculator Plus averages 3.3 out of 5 from 4 ratings, while Transformer Calculator. averages 4.8 from 49 ratings.
Do Transformer Calculator Plus or Transformer Calculator. have ads?
Transformer Calculator. shows ads; Transformer Calculator Plus does not.
Which is updated more often, Transformer Calculator Plus or Transformer Calculator.?
Transformer Calculator Plus ships an update every 45 months, and Transformer Calculator. every 4 months. Most recently, Transformer Calculator Plus was updated on November 2, 2026 and Transformer Calculator. on November 4, 2026.

Other comparisons