Comparison

sSLOPE vs Open Channel Flow Lite

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

Head to head
About

sSLOPE

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
Read full description

sSLOPE is designed to perform a quick slope stability analysis on your phone device. sSLOPE is very simple and easy to use. sSLOPE uses the simplified Bishop method (method of slices) to discretize the soil/rock mass and determine the Factor of Safety (FOS). sSLOPE has the following features: • The stability of horizontally layered soil slope (up to maximum 7 layers) can be analyzed using the latest version (i.e. sSLOPE v3.0). • Water Table can be used for calculating pore pressure. The Water Table can also be used to define ponded water above the slope surface. • Vertical external loading (compression distributed pressure) can be easily applied to the upper slope of a model. • Pseudo-static seismic loads can be added to model by defining the seismic load coefficients in the horizontal and/or vertical directions. • The End Anchored and Soil Nail support can be used to model slope reinforcement. • Failure surface search limits can be modified to narrow down the search area to achieve better accuracy. • Both Mohr-Coulomb and Generalized Hoek-Brown strength criterion can be used to assess stability of soil and rock slopes. • The Settings Tab can be used to configure the main analysis parameters for the model, such as Units of Measurement, Project Title and etc. • The brief summary of analysis results and input data will be displayed in the Report Page. The report button, allows user to save the current model’s input and output information into PDF file. The generated report file can be sent out via email.

About

Open Channel Flow Lite

Features
Read full description

Open Channel Flow Lite is the free edition of Open Channel Flow Pro. It has every feature of the Pro version, for small channels. CHANNEL SHAPES • Rectangular • Trapezoidal • Circular • Natural (irregular cross-section, with overbank roughness) • Triangular • Parabolic SOLVE FOR • Discharge, water depth, bed slope, and the channel width or pipe diameter, using Manning's equation RESULTS • Flow area, wetted perimeter, hydraulic radius, velocity, Froude number and flow regime • Critical depth, specific energy, alternate and sequent depths • Discharge rating curve and specific energy charts MORE TOOLS • Water surface profiles by the direct step method, from a control depth • Efficient Section: size the best section for a design discharge • Manning's n picker • Metric and English units • Worksheets to save and reopen your calculations • PDF reports to share • Built-in documentation and usage manual • iPhone and iPad LIMITS OF THE LITE VERSION • Discharge up to 0.5 m³/s (17.65 ft³/s) • Water depth in a circular channel up to 0.6 m (1.96 ft) • Trapezoidal side slope of 1:1 only Open Channel Flow Pro removes these limits. No account and no ads. Your worksheets stay on your device.

Screenshots

sSLOPE4 screens
Open Channel Flow Lite4 screens

Verdict

The call

The clearest difference is price: Open Channel Flow Lite at Free against sSLOPE's $3.99. Open Channel Flow Lite also leads on update cadence (every 13 months vs every 27 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

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

CostPrice · In-app purchases · Ads · Monetization

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

UpkeepUpdate frequency

sSLOPE ships an update every 27 months, Open Channel Flow Lite every 13 months. The most recent releases landed on September 29, 2026 and October 14, 2026 respectively.

Scorecard2 real differences · 7 level
sSLOPE versus Open Channel Flow Lite: the parameters behind the verdict, then further details
ParametersSLOPEOpen Channel Flow Lite
Price$3.99Free — better
Rating4.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyEvery 27 monthsEvery 13 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaid—
DevicesiPhone, iPodiPhone, iPod
Requires iOS15.615.0 — better
Further details — not scored
Size4 MB2 MB
Age rating4+4+
DeveloperRoozbeh Geraili MikolaAlexius Academia

In-app purchases

None

sSLOPE

No in-app purchases

None

Open Channel Flow Lite

No in-app purchases

Questions

Is sSLOPE free?
sSLOPE costs $3.99, with no in-app purchases.
Is Open Channel Flow Lite free?
Open Channel Flow Lite is free to download, with no in-app purchases.
Do sSLOPE or Open Channel Flow Lite have ads?
Neither sSLOPE nor Open Channel Flow Lite shows ads.
Which is updated more often, sSLOPE or Open Channel Flow Lite?
sSLOPE ships an update every 27 months, and Open Channel Flow Lite every 13 months. Most recently, sSLOPE was updated on September 29, 2026 and Open Channel Flow Lite on October 14, 2026.

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