Terraequil: Slope Lab
Limit-equilibrium screening
$1.99 · Designed for iPad. Not verified for macOS.
Screen slope stability offline with factor-of-safety calculations, pore-pressure scenarios, editable evidence, and transparent geotechnical assumptions.
Terraequil: Slope Lab is a focused, fully on-device app. Transparent slope-stability screening with Fellenius and simplified Bishop slices, circular surface search, groundwater scenarios, reinforcement loads, and sensitivity plots.
KEY FEATURES
- Transparent slice calculations
- Fellenius and Bishop comparison
- Groundwater sensitivity plot
- Local section-photo evidence
- Editable sample data and CSV import
- Side-by-side scenario comparison
- Local PDF evidence export
- Fifty-three original offline reference plates
ONE-TIME AND PRIVATE
- One paid download; no subscription or in-app purchase
- No account, advertising, analytics, tracking, or developer-operated backend
- Core features and bundled content work offline
- Work remains on device unless you deliberately share or export it through an Apple system interface
Slope results are preliminary screening only. They do not replace subsurface investigation, groundwater assessment, field instrumentation, or a qualified geotechnical engineer.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The developer, Robert Corbin, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Robert Corbin
- Size
- 93.9 MB
- Category
- Utilities
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Age Rating
4+
- 4+
- Copyright
- © 2026 Robert Corbin
