Comparison

SimTunnel Lite vs STS2

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

Head to head
About

SimTunnel Lite

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SimTunnel Lite is designed to perform a quick tunnel analysis on your phone device. SimTunnel Lite is very simple and easy to use. SimTunnel Lite uses "rock-support interaction" or "convergence-confinement" method to estimate the deformation of circular tunnels in weak rock, and visualizing the tunnel interaction with various support systems. SimTunnel Lite has the following features: - SimTunnel Lite determines Factor of Safety (FOS) as the ratio of maximum support pressure to the support pressure required for equilibrium. - The Tunnel and Rock Parameters dialog allows you to define the tunnel and rock properties for model. - The Strength Properties which are required will depend on the strength criteria you have selected in Setting Page. - Both Mohr-Coulomb and Hoek-Brown strength criteria are available. - The parameter calculator dialogs are available to help you to calculate some of the parameters (i.e. GSI, mi, D, UCS, insitu stress and etc). - The support parameters dialog allows you to easily add support (i.r. Rockbolt) and define the support properties for the model. - Rockbolt support type can be added to the model. - The ground reaction curve (GRC) is always displayed in the output page. - The brief summary of analysis results and input data will be displayed in the Output Page. - The report button, allows you to save the current model’s input and output information into PDF file. The generated report file can be sent out via email.

About

STS2

Features
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Smart Tunnelling System is a practical application specially designed for the tunnel construction industry. STS provides shield construction enterprises with comprehensive data collection, storage, monitoring and intelligent decision-making services based on big data analysis. It mainly realizes the functions of remote real-time monitoring, tunneling progress control, report management, statistical analysis and business management of roadheader cluster.

Screenshots

SimTunnel Lite4 screens
STS23 screens

Verdict

The call

The clearest difference is update cadence: STS2 at every 2 months against SimTunnel Lite's every 39 months. STS2 also leads on iOS requirement (13.0 vs 15.6). On price, ads, in-app purchases and device support there is nothing between them.

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

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

SimTunnel Lite ships an update every 39 months, STS2 every 2 months. The most recent releases landed on October 12, 2026 and October 8, 2026 respectively.

Scorecard2 real differences Β· 4 level
SimTunnel Lite versus STS2: the parameters behind the verdict, then further details
ParameterSimTunnel LiteSTS2
PriceFreeFree
Update frequencyEvery 39 monthsEvery 2 months β€” better
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPodiPhone, iPod
Requires iOS15.613.0 β€” better
Further details β€” not scored
Size5 MB76 MB
Age rating4+4+
DeveloperRoozbeh Geraili Mikola中铁ε·₯η¨‹θ£…ε€‡ι›†ε›’ζœ‰ι™ε…¬εΈ

In-app purchases

None

SimTunnel Lite

No in-app purchases

None

STS2

No in-app purchases

Questions

Is SimTunnel Lite free?
SimTunnel Lite is free to download, with no in-app purchases.
Is STS2 free?
STS2 is free to download, with no in-app purchases.
Do SimTunnel Lite or STS2 have ads?
Neither SimTunnel Lite nor STS2 shows ads.
Which is updated more often, SimTunnel Lite or STS2?
SimTunnel Lite ships an update every 39 months, and STS2 every 2 months. Most recently, SimTunnel Lite was updated on October 12, 2026 and STS2 on October 8, 2026.

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