# ASHRAE 365 vs E3 ES

The clearest difference is review sentiment: E3 ES at 100% against ASHRAE 365's 0%. E3 ES also leads on update cadence (every 3 weeks vs every 4 months) and monetization model (free vs ad-supported). 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.

ASHRAE 365 ships an update every 4 months, E3 ES every 3 weeks. The most recent releases landed on October 12, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | ASHRAE 365 | E3 ES |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.2 (10 ratings)](https://appshunter.io/ios/app/ashrae-365/id1337759799/reviews)** | — |
| Number of ratings | **10** | — |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 weeks** |
| Monetization | Ad-supported | **Free** |
| Size | 53 MB | 53 MB |
| Requires iOS | 17.6 | 17.6 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [ASHRAE, Inc.](https://appshunter.io/developer/375374912) | [Webtrack S.A.](https://appshunter.io/developer/947248143) |

## What reviewers say

### ASHRAE 365

[App page](https://appshunter.io/ios/app/ashrae-365/id1337759799)

Access ASHRAE information year-round. Stay updated on global conferences and events, connect with the community via social media, and discover resources to support the Society.

**Highlights:** Conference and event updates, Social media integration, Resource discovery, Society support information, Year-round access

**Features:** Vision Pro support

**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 ASHRAE 365 free?

ASHRAE 365 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 ASHRAE 365 or E3 ES have ads?

Neither ASHRAE 365 nor E3 ES shows ads.

### Which is updated more often, ASHRAE 365 or E3 ES?

ASHRAE 365 ships an update every 4 months, and E3 ES every 3 weeks. Most recently, ASHRAE 365 was updated on October 12, 2026 and E3 ES on October 2, 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.*