# Guru Technicians vs Transformer Calculation Tool

The clearest difference is in-app purchases: Guru Technicians at none against Transformer Calculation Tool's 1. Transformer Calculation Tool's advantage is update cadence (every 4 weeks vs every 2 months) and iOS requirement (13.0 vs 15.1). On price, ads and device support there is nothing between them.

Both are free to download. Transformer Calculation Tool sells 1 one-off in-app purchase. Guru Technicians asks for nothing beyond the download.

Guru Technicians ships an update every 2 months, Transformer Calculation Tool every 4 weeks. The most recent releases landed on October 1, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | Guru Technicians | Transformer Calculation Tool |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 4 weeks** |
| Size | 61 MB | 57 MB |
| Requires iOS | 15.1 | **13.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 12+ | 4+ |
| Developer | [Blazor Technologies Inc](https://appshunter.io/developer/1484281598) | [Shraddhaben Parmar](https://appshunter.io/developer/1889769325) |

## What reviewers say

### Guru Technicians

[App page](https://appshunter.io/ios/app/guru-technicians/id6742172413)

**Features:** macOS Compatibility

**In-app purchases:** none


### Transformer Calculation Tool

[App page](https://appshunter.io/ios/app/transformer-calculation-tool/id6772152007)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime premium | $9.99 | one-time |


## Frequently asked questions

### Is Guru Technicians free?

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

### Is Transformer Calculation Tool free?

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

### Do Guru Technicians or Transformer Calculation Tool have ads?

Neither Guru Technicians nor Transformer Calculation Tool shows ads.

### Which is updated more often, Guru Technicians or Transformer Calculation Tool?

Guru Technicians ships an update every 2 months, and Transformer Calculation Tool every 4 weeks. Most recently, Guru Technicians was updated on October 1, 2026 and Transformer Calculation Tool on October 3, 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.*