# Transformer Calculator. vs StatFeedr Configuration

The clearest difference is in-app purchases: StatFeedr Configuration at none against Transformer Calculator.'s 1. StatFeedr Configuration also leads on ads (none vs shown) and iOS requirement (15.6 vs 17.6). Transformer Calculator.'s advantage is update cadence (every 4 months vs every 44 months). On price and device support there is nothing between them.

Both are free to download. Transformer Calculator. sells 1 one-off in-app purchase. StatFeedr Configuration asks for nothing beyond the download.

Transformer Calculator. ships an update every 4 months, StatFeedr Configuration every 44 months. The most recent releases landed on October 23, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Transformer Calculator. | StatFeedr Configuration |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (48 ratings)](https://appshunter.io/ios/app/transformer-calculator/id1506155081/reviews)** | — |
| Number of ratings | **48** | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 4 months** | Every 44 months |
| Monetization | Free with in-app purchases | — |
| Size | 41 MB | 4 MB |
| Requires iOS | 17.6 | **15.6** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [V PUGAZHENTHI](https://appshunter.io/developer/491898049) | [12D Sports, Inc](https://appshunter.io/developer/1578332952) |

## What reviewers say

### Transformer Calculator.

[App page](https://appshunter.io/ios/app/transformer-calculator/id1506155081)

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:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Go Pro | $3.99 | one-time |


### StatFeedr Configuration

[App page](https://appshunter.io/ios/app/statfeedr-configuration/id1578332950)

**In-app purchases:** none


## Frequently asked questions

### Is Transformer Calculator. free?

Transformer Calculator. is free to download, with in-app purchases available.

### Is StatFeedr Configuration free?

StatFeedr Configuration is free to download, with no in-app purchases.

### Do Transformer Calculator. or StatFeedr Configuration have ads?

Transformer Calculator. shows ads; StatFeedr Configuration does not.

### Which is updated more often, Transformer Calculator. or StatFeedr Configuration?

Transformer Calculator. ships an update every 4 months, and StatFeedr Configuration every 44 months. Most recently, Transformer Calculator. was updated on October 23, 2026 and StatFeedr Configuration on October 5, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*