# Max Zs Values vs PASMA

The clearest difference is price: PASMA at Free against Max Zs Values's $9.99. Max Zs Values's advantage is review sentiment (55% vs 39%) and iOS requirement (11.0 vs 13.0). On update cadence, ads, in-app purchases and device support there is nothing between them.

PASMA is free to download; Max Zs Values costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Max Zs Values ships an update every 4 months, PASMA every 3 months. The most recent releases landed on September 24, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | Max Zs Values | PASMA |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Positive reviews | **55.2% of reviews** | 38.9% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 months** |
| Monetization | Paid | **Free** |
| Size | 15 MB | 27 MB |
| Requires iOS | **11.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Pro Certs Software Ltd](https://appshunter.io/developer/444429696) | [Prefabricated Access Suppliers' and Manufacturers' Association Ltd](https://appshunter.io/developer/535470930) |

## What reviewers say

### Max Zs Values

[App page](https://appshunter.io/ios/app/max-zs-values/id498838137)

This app calculates and displays maximum permitted Zs values for electrical installations, adhering to the 18th Edition of BS 7671. It includes 80% temperature adjusted values and manufacturer charts for MCCB devices, along with a converter for older Zs values.

**Highlights:** 100% BS 7671 Zs Values, 80% On Site Guide Zs Values, Adjustable disconnection times (0.4s, 0.2s, 5s), BS EN Device Zs calculation, MCCB 60947-2 Zs charts, Zs Converter for 18th edition

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

**In-app purchases:** none


### PASMA

[App page](https://appshunter.io/ios/app/pasma/id535470547)

This app serves as a central hub for the mobile access tower industry in Europe. It provides industry-standard training information and publishes safety-related guidance for manufacturers, suppliers, specifiers, and users.

**Highlights:** Industry standard training scheme, Safety knowledge and guidance, Information for manufacturers, Information for suppliers, Information for specifiers, Information for users

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

**In-app purchases:** none


## Frequently asked questions

### Is Max Zs Values free?

Max Zs Values costs $9.99, with no in-app purchases.

### Is PASMA free?

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

### Do Max Zs Values or PASMA have ads?

Neither Max Zs Values nor PASMA shows ads.

### Which is updated more often, Max Zs Values or PASMA?

Max Zs Values ships an update every 4 months, and PASMA every 3 months. Most recently, Max Zs Values was updated on September 24, 2026 and PASMA on September 22, 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.*