# PMI View vs GridHUBB

The clearest difference is update cadence: PMI View at every 2 months against GridHUBB's every 4 months. GridHUBB's advantage is iOS requirement (16.0 vs 18.0). 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.

PMI View ships an update every 2 months, GridHUBB every 4 months. The most recent releases landed on September 17, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | PMI View | GridHUBB |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (4 ratings)](https://appshunter.io/ios/app/pmi-view/id6465390024/reviews)** | — |
| Number of ratings | **4** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 4 months |
| Monetization | Free | — |
| Size | 242 MB | 161 MB |
| Requires iOS | 18.0 | **16.0** |
| Devices | **iPhone, iPad, Apple Watch** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Power Monitors, Incorporated](https://appshunter.io/developer/540822326) | [Hubbell Inc](https://appshunter.io/developer/1263996930) |

## What reviewers say

### PMI View

[App page](https://appshunter.io/ios/app/pmi-view/id6465390024)

This application provides a platform for viewing and analyzing power quality data from field devices. It allows real-time inspection of waveforms, vector diagrams, harmonics, and meter readings. Recordings can be easily downloaded, inspected, and exported.

**Highlights:** Real-time waveform viewing, Vector diagram analysis, Harmonics inspection, Meter readings, Downloadable recordings, Exportable data

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


### GridHUBB

[App page](https://appshunter.io/ios/app/gridhubb/id6499595556)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is PMI View free?

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

### Is GridHUBB free?

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

### Do PMI View or GridHUBB have ads?

Neither PMI View nor GridHUBB shows ads.

### Which is updated more often, PMI View or GridHUBB?

PMI View ships an update every 2 months, and GridHUBB every 4 months. Most recently, PMI View was updated on September 17, 2026 and GridHUBB on September 22, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*