# Structural Lines vs Openings Studio

Structural Lines and Openings Studio are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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 2 months. The most recent releases landed on October 3, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Structural Lines | Openings Studio |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (11 ratings)](https://appshunter.io/ios/app/openings-studio/id1438786437/reviews)** |
| Number of ratings | — | **11** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | — | Free |
| Size | 56 MB | 232 MB |
| Requires iOS | 16.1 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Efficient Foundations Pty Ltd](https://appshunter.io/developer/1047597104) | [OpeningsStudio](https://appshunter.io/developer/1438786436) |

## What reviewers say

### Structural Lines

[App page](https://appshunter.io/ios/app/structural-lines/id1425830779)

**Features:** macOS Compatibility

**In-app purchases:** none


### Openings Studio

[App page](https://appshunter.io/ios/app/openings-studio/id1438786437)

Manage door openings throughout the building lifecycle with this app. Document existing conditions, perform compliance checks, and complete punch lists for new construction. Syncs data with a desktop platform for seamless project management.

**Highlights:** Manage door openings and hardware, Document existing building conditions, Perform compliance checks (fire, egress, smoke), Complete punch lists for new construction, Offline mode for on-site work, Syncs data with desktop platform, Attach photos, videos, and voice memos

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

**In-app purchases:** none


## Frequently asked questions

### Is Structural Lines free?

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

### Is Openings Studio free?

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

### Do Structural Lines or Openings Studio have ads?

Neither Structural Lines nor Openings Studio shows ads.

### Which is updated more often, Structural Lines or Openings Studio?

Structural Lines ships an update every 2 months, and Openings Studio every 2 months. Most recently, Structural Lines was updated on October 3, 2026 and Openings Studio on October 10, 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.*