# Skylar App vs E3 ES

The clearest difference is iOS requirement: Skylar App at 13.0 against E3 ES's 17.6. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on June 4, 2026 and June 1, 2026 respectively.

## The numbers

| Metric | Skylar App | E3 ES |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (4 ratings)](https://appshunter.io/ios/app/skylar-app/id1670223193/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Monetization | Free | Free |
| Size | 35 MB | 53 MB |
| Requires iOS | **13.0** | 17.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [Skylar Security, LLC](https://appshunter.io/developer/1521248141) | [Webtrack Sociedad Anonima](https://appshunter.io/developer/947248143) |

## What reviewers say

### Skylar App

[App page](https://appshunter.io/ios/app/skylar-app/id1670223193)

This app provides teams with a customizable infrastructure for managing guards, scheduling, and dispatching. It simplifies team coordination and operational oversight.

**Highlights:** Guard management, Team scheduling, Dispatching capabilities, Customizable infrastructure, Operational oversight

**In-app purchases:** none


### E3 ES

[App page](https://appshunter.io/ios/app/e3-es/id6596773560)

This application helps track information related to HVAC systems and other building infrastructure. It is designed for professionals involved in designing and upgrading buildings with high-efficiency systems.

**Highlights:** Track HVAC system information, Monitor building infrastructure, Support for high-efficiency systems, Designed for building upgrades, Data tracking for professionals

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Skylar App free?

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

### Is E3 ES free?

E3 ES is free to download, with no in-app purchases.

### Do Skylar App or E3 ES have ads?

Neither Skylar App nor E3 ES shows ads.

### Which is updated more often, Skylar App or E3 ES?

Skylar App ships an update every 3 weeks, and E3 ES every 3 weeks. Most recently, Skylar App was updated on June 4, 2026 and E3 ES on June 1, 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.*