# Structural Lines vs FormAssembly Mobile

The clearest difference is update cadence: FormAssembly Mobile at fortnightly against Structural Lines's every 2 months. FormAssembly Mobile also leads on iOS requirement (14.0 vs 16.1). 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.

Structural Lines ships an update every 2 months, FormAssembly Mobile fortnightly. The most recent releases landed on September 16, 2026 and June 1, 2026 respectively.

## The numbers

| Metric | Structural Lines | FormAssembly Mobile |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (4 ratings)](https://appshunter.io/ios/app/formassembly-mobile/id6443781731/reviews)** |
| Number of ratings | — | **4** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Fortnightly** |
| Monetization | — | Free |
| Size | 56 MB | 9 MB |
| Requires iOS | 16.1 | **14.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Efficient Foundations Pty Ltd](https://appshunter.io/developer/1047597104) | [FormAssembly, inc.](https://appshunter.io/developer/1034500841) |

## What reviewers say

### Structural Lines

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

**Features:** macOS Compatibility

**In-app purchases:** none


### FormAssembly Mobile

[App page](https://appshunter.io/ios/app/formassembly-mobile/id6443781731)

Collect data and upload files on the go, even without an internet connection. Securely sync your information to your account once you're back online. Ideal for remote data capture and on-site work.

**Highlights:** Offline data capture, Offline file uploads, SAML login for secure access, Sync data to FormAssembly account, On-the-go data gathering

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Structural Lines free?

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

### Is FormAssembly Mobile free?

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

### Do Structural Lines or FormAssembly Mobile have ads?

Neither Structural Lines nor FormAssembly Mobile shows ads.

### Which is updated more often, Structural Lines or FormAssembly Mobile?

Structural Lines ships an update every 2 months, and FormAssembly Mobile fortnightly. Most recently, Structural Lines was updated on September 16, 2026 and FormAssembly Mobile 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.*