Comparison

Structural Lines vs Stacy

Price, ratings, monetisation and update history for both apps, side by side โ€” with what reviewers say about each.

Head to head
About

Structural Lines

Features
Read full description

The Structural Lines smart client Form app collects field entered information via digital forms created in the Structural Lines Cloud service, eliminating paper based forms. This app will let you collect asset inspection data on your mobile device. The Structural Lines Platform is a subscription service only. Send an enquiry in our website if you would like more information on how to access the platform. All information that you collect within the application will be stored on your device until you have a stable internet connection or connect to wifi. This takes the pain of of doing remote work or working in notorious data connection hotspots. (Please note, that internet is required for the first login in our app)

About

Stacy

Features
Read full description

Stacy is a flexible workspace for notes, projects, journals, databases, whiteboards, and connected ideas. Write with a block editor, organize information into structured pages, link related work, and collaborate on shared documents. Sketch on an infinite whiteboard canvas with stickies, shapes, and connectors โ€” the same canvas as Stacy on desktop. Record a voice memo or a whole meeting right on your phone โ€” Stacy transcribes it into a structured page with the summary, decisions, and action items. Capture a web link or text from the iOS Share Extension and finish organizing it when Stacy opens. After one successful sign-in and sync, previously available workspace data and cached shared pages can open without a connection. Supported local edits and new attachments, plus supported shared-page edits, stay on the device and retry after Stacy reconnects and revalidates access. Hosted AI, live presence, first sign-in, incoming collaborator changes, and files that have not yet been cached still require internet access. Hosted AI is optional. Before the first hosted request on iOS, Stacy explains which prompt or selected content is sent and which provider categories process it. Declining hosted AI does not remove notes, sync, or collaboration. Public pages include a Report action. Account holders can review connected devices, withdraw hosted-AI permission, and permanently delete their account from the app. Stacy is free to use. An optional Stacy Pro subscription unlocks higher AI limits, unlimited email-gated shared pages, and more attachment storage. Stacy Pro (optional auto-renewable subscription) โ€ข Stacy Pro Monthly โ€” $7.99 per month โ€ข Stacy Pro Yearly โ€” $79.99 per year Payment is charged to your Apple Account at confirmation of purchase. The subscription renews automatically unless auto-renew is turned off at least 24 hours before the end of the current period, and your account is charged for renewal within 24 hours before the period ends. You can manage or cancel your subscription in your Apple Account settings after purchase. Privacy Policy: https://stacy.page/privacy Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Stacy Terms of Service: https://stacy.page/terms

Screenshots

Structural Lines4 screens
Stacy4 screens

Verdict

The call

The clearest difference is in-app purchases: Structural Lines at none against Stacy's 2. Stacy's advantage is update cadence (weekly vs every 2 months) and device support (4 vs 2). On price, ads and iOS requirement there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Stacy sells 2 in-app purchases, starting at $7.99 per month. Structural Lines asks for nothing beyond the download.

UpkeepUpdate frequency

Structural Lines ships an update every 2 months, Stacy weekly. The most recent releases landed on September 16, 2026 and September 15, 2026 respectively.

Scorecard3 real differences ยท 3 level
Structural Lines versus Stacy: the parameters behind the verdict, then further details
ParameterStructural LinesStacy
PriceFreeFree
Update frequencyEvery 2 monthsWeekly โ€” better
AdsNoNo
In-app purchasesNo โ€” betterYes
DevicesiPhone, iPadiPhone, iPad, iPod, Apple Watch โ€” better
Requires iOS16.115.0 โ€” better
Further details โ€” not scored
Size56 MB35 MB
Age rating4+4+
DeveloperEfficient Foundations Pty LtdSadullah Dinc

In-app purchases

None

Structural Lines

No in-app purchases

2 purchases

Stacy

Subscriptions2
  • Stacy Pro (Monthly)$7.991 Month
  • Stacy Pro (Yearly)$79.991 Year

Questions

Is Structural Lines free?
Structural Lines is free to download, with no in-app purchases.
Is Stacy free?
Stacy is free to download, with in-app purchases available.
Do Structural Lines or Stacy have ads?
Neither Structural Lines nor Stacy shows ads.
Which is updated more often, Structural Lines or Stacy?
Structural Lines ships an update every 2 months, and Stacy weekly. Most recently, Structural Lines was updated on September 16, 2026 and Stacy on September 15, 2026.

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