Comparison

Lucky S vs FlowAnalyzer Viewer

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

Head to head
About

Lucky S

Features
Read full description

Lucky S 是幸运咖官方自主研发的门店管理工具,致力于为门店经营者提供高效便捷的信息化服务!

About

FlowAnalyzer Viewer

Features
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FlowAnalyzer Viewer opens water network models (.inp files) on your iPhone or iPad, runs a hydraulic simulation with the EPANET 2.2 engine, and lets you inspect the results element by element. WHAT YOU CAN DO • Open .inp files from Files, Mail, AirDrop or cloud storage • Run a hydraulic simulation and step through the time periods • See the network on an interactive map: zoom, pan, touch and hold any node to see its data • Read pressure, head, demand, flow, velocity and headloss for junctions, pipes, pumps, tanks, reservoirs and valves • Review hydraulic and time options • Works offline. Your files stay on your device EDIT IN FLOWANALYZER Tap "Edit & simulate in FlowAnalyzer" on the network screen to send the network to FlowAnalyzer (if installed) to edit it. If FlowAnalyzer is not installed, its App Store page opens inside the viewer. The two apps are separate. They use different EPANET engine versions (2.2 and 2.3.5); results may differ. FREE FlowAnalyzer Viewer is free, with no limit on network size. To edit and create networks, there is FlowAnalyzer. PRIVACY No account, no ads, no tracking. The app collects no data. FlowAnalyzer Viewer uses the EPANET 2.2 engine to read and simulate .inp files. It is an independent app, not affiliated with, endorsed by or sponsored by the U.S. Environmental Protection Agency (EPA).

Screenshots

Lucky S4 screens
FlowAnalyzer Viewer4 screens

Verdict

The call

The clearest difference is in-app purchases: Lucky S at none against FlowAnalyzer Viewer's 1. Lucky S also leads on update cadence (every 9 days vs every 2 months). On price, ads, 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

Both are free to download. FlowAnalyzer Viewer sells 1 one-off in-app purchase. Lucky S asks for nothing beyond the download.

UpkeepUpdate frequency

Lucky S ships an update every 9 days, FlowAnalyzer Viewer every 2 months. The most recent releases landed on October 24, 2026 and October 21, 2026 respectively.

Scorecard2 real differences ¡ 4 level
Lucky S versus FlowAnalyzer Viewer: the parameters behind the verdict, then further details
ParameterLucky SFlowAnalyzer Viewer
PriceFreeFree
Update frequencyEvery 9 days — betterEvery 2 months
AdsNoNo
In-app purchasesNo — betterYes
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS15.015.0
Further details — not scored
Size118 MB1 MB
Age rating4+4+
DeveloperZhengzhou Baodao Technology Co., Ltd.Transparent Blue Water LLC

In-app purchases

None

Lucky S

No in-app purchases

1 purchases

FlowAnalyzer Viewer

One-time1
  • HydroViewer Pro$2.99

Questions

Is Lucky S free?
Lucky S is free to download, with no in-app purchases.
Is FlowAnalyzer Viewer free?
FlowAnalyzer Viewer is free to download, with in-app purchases available.
Do Lucky S or FlowAnalyzer Viewer have ads?
Neither Lucky S nor FlowAnalyzer Viewer shows ads.
Which is updated more often, Lucky S or FlowAnalyzer Viewer?
Lucky S ships an update every 9 days, and FlowAnalyzer Viewer every 2 months. Most recently, Lucky S was updated on October 24, 2026 and FlowAnalyzer Viewer on October 21, 2026.

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