# Green Building Construction vs ECM

The clearest difference is in-app purchases: ECM at none against Green Building Construction's 3. Green Building Construction's advantage is iOS requirement (10.0 vs 16.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Green Building Construction sells 3 in-app purchases, starting at $0.99 per month. ECM asks for nothing beyond the download.

Green Building Construction ships an update every 3 months, ECM every 2 months. The most recent releases landed on November 11, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Green Building Construction | ECM |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 months** |
| Size | 67 MB | 14 MB |
| Requires iOS | **10.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Snappii Corporation](https://appshunter.io/developer/587096976) | [Tasheel Information Technology](https://appshunter.io/developer/1178889054) |

## What reviewers say

### Green Building Construction

[App page](https://appshunter.io/ios/app/green-building-construction/id1158126562)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $0.99 | per month |
| Annual Subscription | $9.99 | per year |
| Ad Removal | $0.99 | one-time |


### ECM

[App page](https://appshunter.io/ios/app/ecm-atm/id6450980827)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Green Building Construction free?

Green Building Construction is free to download, with in-app purchases available.

### Is ECM free?

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

### Do Green Building Construction or ECM have ads?

Neither Green Building Construction nor ECM shows ads.

### Which is updated more often, Green Building Construction or ECM?

Green Building Construction ships an update every 3 months, and ECM every 2 months. Most recently, Green Building Construction was updated on November 11, 2026 and ECM on October 30, 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.*