Transformer Calculator. vs PLC Ninja
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.
PLC Ninja
Access live PLC data directly from your mobile device. Connect via Ethernet, Wi-Fi, or serial adapter to monitor inputs, outputs, timers, counters, and analog values in real-time while in the field.
- Real-time PLC data monitoring
- Ethernet, Wi-Fi, and serial connection support
- View inputs and outputs
- Monitor timers and counters
- Access analog values
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PLC Ninja puts live PLC data on your phone. Connect over Ethernet, Wi-Fi, or a serial adapter, and see every input, output, timer, counter and analog value updating in real time — standing at the panel, not walking back to the office. PLC Ninja is an independent product and is not affiliated with, endorsed by, or sponsored by Rockwell Automation, Siemens AG, AutomationDirect, or Mitsubishi Electric. Allen-Bradley, ControlLogix, CompactLogix, GuardLogix, MicroLogix, SLC 500, RSLogix and Studio 5000 are trademarks of Rockwell Automation. SIMATIC, S7 and LOGO! are trademarks of Siemens AG. DirectLOGIC is a trademark of AutomationDirect. MELSEC and FX are trademarks of Mitsubishi Electric. All product names are used only to identify the equipment this app can connect to. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://plcninja-support.github.io/support/privacy.html
Screenshots
Verdict
The clearest difference is ads: PLC Ninja at none against Transformer Calculator.'s shown. PLC Ninja also leads on update cadence (every 3 weeks vs every 4 months) and rating (5.0 vs 4.8). Transformer Calculator.'s advantage is ratings volume (49 vs 3). On price, in-app purchases, monetization model 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
Both are free to download. Transformer Calculator. sells 1 one-off in-app purchase and PLC Ninja sells 6 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.
PLC Ninja holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Transformer Calculator. has 49 ratings behind it against 3, so its average is the more settled of the two.
Transformer Calculator. ships an update every 4 months, PLC Ninja every 3 weeks. The most recent releases landed on October 27, 2026 and October 22, 2026 respectively.
| Parameter | Transformer Calculator. | PLC Ninja |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (49 ratings) | 5.0 (3 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | 49 — better | 3 |
| Update frequency | Every 4 months | Every 3 weeks — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 17.6 | 17.6 |
| Further details — not scored | ||
| Size | 41 MB | 10 MB |
| Age rating | 4+ | 4+ |
| Developer | V PUGAZHENTHI | SHAOHUA YI |
Customer experience
Transformer Calculator.
PLC Ninja
In-app purchases
Transformer Calculator.
- Go Pro$3.99
PLC Ninja
- Standard$3.991 Month
- Professional$8.991 Month
- Ultimate$14.991 Month
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- Standard$39.991 Year
- Professional$89.991 Year
- Ultimate$149.991 Year
Questions
Is Transformer Calculator. free?
Is PLC Ninja free?
Which has better reviews, Transformer Calculator. or PLC Ninja?
Do Transformer Calculator. or PLC Ninja have ads?
Which is updated more often, Transformer Calculator. or PLC Ninja?
Other comparisons
