# PTI Transformer vs Epiroc Tool Selector

The clearest difference is update cadence: Epiroc Tool Selector at every 3 months against PTI Transformer's every 11 months. PTI Transformer's advantage is iOS requirement (12.0 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

PTI Transformer ships an update every 11 months, Epiroc Tool Selector every 3 months. The most recent releases landed on June 24, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | PTI Transformer | Epiroc Tool Selector |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/pti-transformer/id522826739/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 11 months | **Every 3 months** |
| Monetization | Free | — |
| Size | 3 MB | 10 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Push Interactions, Inc.](https://appshunter.io/developer/357410200) | [Epiroc Rock Drills AB](https://appshunter.io/developer/1420003769) |

## What reviewers say

### PTI Transformer

[App page](https://appshunter.io/ios/app/pti-transformer/id522826739)

This app calculates electrical transformer performance metrics like current, voltage, efficiency, and regulation. It also offers SI/Metric conversions for various physical quantities and includes a tool for estimating ship dates based on order time.

**Highlights:** Transformer current, voltage, efficiency, and regulation calculation, SI/Metric unit conversions, Speed, force, power, area, pressure, volume, temperature, weights & measures conversions, Ship date estimation tool, Information about the developer

**Features:** macOS Compatibility

**In-app purchases:** none


### Epiroc Tool Selector

[App page](https://appshunter.io/ios/app/epiroc-tool-selector/id6740192574)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is PTI Transformer free?

PTI Transformer is free to download, with no in-app purchases.

### Is Epiroc Tool Selector free?

Epiroc Tool Selector is free to download, with no in-app purchases.

### Do PTI Transformer or Epiroc Tool Selector have ads?

Neither PTI Transformer nor Epiroc Tool Selector shows ads.

### Which is updated more often, PTI Transformer or Epiroc Tool Selector?

PTI Transformer ships an update every 11 months, and Epiroc Tool Selector every 3 months. Most recently, PTI Transformer was updated on June 24, 2026 and Epiroc Tool Selector on September 9, 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.*