# Ignition Perspective vs Hydro Calcs

The clearest difference is update cadence: Hydro Calcs at every 5 days against Ignition Perspective's every 4 months. 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.

Ignition Perspective ships an update every 4 months, Hydro Calcs every 5 days. The most recent releases landed on October 1, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Ignition Perspective | Hydro Calcs |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (25 ratings)](https://appshunter.io/ios/app/ignition-perspective/id1430340904/reviews)** | — |
| Number of ratings | **25** | — |
| Positive reviews | 80.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 5 days** |
| Monetization | Free | — |
| Size | 50 MB | 2 MB |
| Requires iOS | **16.6** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Inductive Automation LLC](https://appshunter.io/developer/1430340903) | [Milbar](https://appshunter.io/developer/1579581418) |

## What reviewers say

### Ignition Perspective

[App page](https://appshunter.io/ios/app/ignition-perspective/id1430340904)

This application allows users to view and control industrial processes directly from their mobile devices. It provides responsive interfaces optimized for smartphones and tablets, enabling remote management of industrial automation systems.

**Highlights:** Remote process viewing, Touch-based control, Responsive mobile interfaces, Industrial automation system access, Enterprise data connectivity

**Features:** macOS Compatibility

**In-app purchases:** none


### Hydro Calcs

[App page](https://appshunter.io/ios/app/hydro-calcs/id6817881146)

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

**In-app purchases:** none


## Frequently asked questions

### Is Ignition Perspective free?

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

### Is Hydro Calcs free?

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

### Do Ignition Perspective or Hydro Calcs have ads?

Neither Ignition Perspective nor Hydro Calcs shows ads.

### Which is updated more often, Ignition Perspective or Hydro Calcs?

Ignition Perspective ships an update every 4 months, and Hydro Calcs every 5 days. Most recently, Ignition Perspective was updated on October 1, 2026 and Hydro Calcs on October 8, 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.*