# PTI Transformer vs Sheltera

The clearest difference is update cadence: Sheltera at every 5 days against PTI Transformer's every 11 months. PTI Transformer's advantage is iOS requirement (12.0 vs 15.0). On price, rating, ratings volume and ads there is nothing between them.

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

On the App Store both sit at effectively the same score — 5.0 for PTI Transformer against 5.0 for Sheltera. Both are backed by a comparable volume of ratings — 1 and 2 respectively.

PTI Transformer ships an update every 11 months, Sheltera every 5 days. The most recent releases landed on October 14, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | PTI Transformer | Sheltera |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/pti-transformer/id522826739/reviews) | [5.0 (2 ratings)](https://appshunter.io/ios/app/sheltera/id6468591677/reviews) |
| Number of ratings | 1 | **2** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 11 months | **Every 5 days** |
| Monetization | Free | Free |
| Size | 3 MB | 70 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) | [Sanmi Ajanaku](https://appshunter.io/developer/1079050270) |

## 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


### Sheltera

[App page](https://appshunter.io/ios/app/sheltera/id6468591677)

This app helps utility professionals manage vegetation and storm response. It allows for incident reporting, work order creation, photo documentation, resource recommendations, and quality control. It leverages AI and imagery analysis for efficient vegetation monitoring and storm damage repair.

**Highlights:** Incident reporting, Work order creation, Photo documentation, Resource recommendations, Quality control, Vegetation monitoring, Storm response planning

**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 Sheltera free?

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

### Which has better reviews, PTI Transformer or Sheltera?

PTI Transformer and Sheltera are both rated 5.0 out of 5 on the App Store, from 1 and 2 ratings respectively.

### Do PTI Transformer or Sheltera have ads?

Neither PTI Transformer nor Sheltera shows ads.

### Which is updated more often, PTI Transformer or Sheltera?

PTI Transformer ships an update every 11 months, and Sheltera every 5 days. Most recently, PTI Transformer was updated on October 14, 2026 and Sheltera on October 15, 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.*