# ELM FieldSight vs SiteAlign Pro

The clearest difference is in-app purchases: ELM FieldSight at none against SiteAlign Pro's 2. SiteAlign Pro's advantage is update cadence (every 11 days vs monthly) and device support (3 vs 1). On price, ads and iOS requirement there is nothing between them.

Both are free to download. SiteAlign Pro sells 2 in-app purchases, starting at $4.99 per month. ELM FieldSight asks for nothing beyond the download.

ELM FieldSight ships an update monthly, SiteAlign Pro every 11 days. The most recent releases landed on October 21, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | ELM FieldSight | SiteAlign Pro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/elm-fieldsight/id6444499927/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 11 days** |
| Monetization | Free | — |
| Size | 32 MB | 45 MB |
| Requires iOS | 16.0 | **15.1** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [ELM Fieldsight LLC](https://appshunter.io/developer/1654990606) | [CHADWYN K WILLIAMS](https://appshunter.io/developer/1848061037) |

## What reviewers say

### ELM FieldSight

[App page](https://appshunter.io/ios/app/elm-fieldsight/id6444499927)

Monitor your ELM FieldSight Microgrid Controller in real-time. Access data from your ELM Microgrid Battery Energy Storage System using your existing web portal credentials. This app requires an ELM Microgrid system to function.

**Highlights:** Real-time monitoring, Microgrid Controller access, Battery Energy Storage System data, Web portal credential integration, Mobile access to system data

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

**In-app purchases:** none


### SiteAlign Pro

[App page](https://appshunter.io/ios/app/sitealign-pro/id6754368289)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SiteAlign Pro Monthly | $4.99 | per month |
| SiteAlign Pro Yearly | $29.99 | per year |


## Frequently asked questions

### Is ELM FieldSight free?

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

### Is SiteAlign Pro free?

SiteAlign Pro is free to download, with in-app purchases available.

### Do ELM FieldSight or SiteAlign Pro have ads?

Neither ELM FieldSight nor SiteAlign Pro shows ads.

### Which is updated more often, ELM FieldSight or SiteAlign Pro?

ELM FieldSight ships an update monthly, and SiteAlign Pro every 11 days. Most recently, ELM FieldSight was updated on October 21, 2026 and SiteAlign Pro on October 4, 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.*