# PTI Transformer vs StashMarks

The clearest difference is iOS requirement: PTI Transformer at 12.0 against StashMarks's 17.6. 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.

## The numbers

| Metric | PTI Transformer | StashMarks |
| --- | --- | --- |
| 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 | — |
| Monetization | Free | — |
| Size | 3 MB | 15 MB |
| Requires iOS | **12.0** | 17.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Push Interactions, Inc.](https://appshunter.io/developer/357410200) | [Nasuh Emre atessoy](https://appshunter.io/developer/1881317418) |

## 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


### StashMarks

[App page](https://appshunter.io/ios/app/stashmarks/id6775229127)

**Features:** macOS Compatibility, Safari Extension, 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 StashMarks free?

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

### Do PTI Transformer or StashMarks have ads?

Neither PTI Transformer nor StashMarks shows ads.

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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.*