# sSLOPE vs GCTS gTest

The clearest difference is price: GCTS gTest at Free against sSLOPE's $3.99. GCTS gTest also leads on update cadence (every 3 weeks vs every 27 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

GCTS gTest is free to download; sSLOPE costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

sSLOPE ships an update every 27 months, GCTS gTest every 3 weeks. The most recent releases landed on September 23, 2026 and August 12, 2026 respectively.

## The numbers

| Metric | sSLOPE | GCTS gTest |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | **[4.0 (1 ratings)](https://appshunter.io/ios/app/sslope/id1403201500/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 27 months | **Every 3 weeks** |
| Monetization | Paid | — |
| Size | 4 MB | 144 MB |
| Requires iOS | 15.6 | **14.2** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Roozbeh Geraili Mikola](https://appshunter.io/developer/1403201499) | [GCTS Testing Systems](https://appshunter.io/developer/539767606) |

## What reviewers say

### sSLOPE

[App page](https://appshunter.io/ios/app/sslope/id1403201500)

Perform quick slope stability analyses on your mobile device. This app uses the simplified Bishop method to calculate the Factor of Safety for soil and rock slopes, supporting various conditions like water tables, external loads, and seismic forces.

**Highlights:** Analyze horizontally layered soil slopes (up to 7 layers), Incorporate water table effects and ponded water, Apply vertical external loading, Model pseudo-static seismic loads, Simulate End Anchored and Soil Nail support, Adjust failure surface search limits, Utilize Mohr-Coulomb and Hoek-Brown strength criteria, Generate and email PDF reports

**In-app purchases:** none


### GCTS gTest

[App page](https://appshunter.io/ios/app/gcts-gtest/id1588420445)

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

**In-app purchases:** none


## Frequently asked questions

### Is sSLOPE free?

sSLOPE costs $3.99, with no in-app purchases.

### Is GCTS gTest free?

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

### Do sSLOPE or GCTS gTest have ads?

Neither sSLOPE nor GCTS gTest shows ads.

### Which is updated more often, sSLOPE or GCTS gTest?

sSLOPE ships an update every 27 months, and GCTS gTest every 3 weeks. Most recently, sSLOPE was updated on September 23, 2026 and GCTS gTest on August 12, 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.*