Lucky S vs FlowAnalyzer Viewer
Price, ratings, monetisation and update history for both apps, side by side â with what reviewers say about each.
Lucky S
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FlowAnalyzer Viewer
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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
Verdict
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
Both are free to download. FlowAnalyzer Viewer sells 1 one-off in-app purchase. Lucky S asks for nothing beyond the download.
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.
| Parameter | Lucky S | FlowAnalyzer Viewer |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 9 days â better | Every 2 months |
| Ads | No | No |
| In-app purchases | No â better | Yes |
| Devices | iPhone, iPod | iPhone, iPad, iPod â better |
| Requires iOS | 15.0 | 15.0 |
| Further details â not scored | ||
| Size | 118 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Zhengzhou Baodao Technology Co., Ltd. | Transparent Blue Water LLC |
In-app purchases
Lucky S
No in-app purchases
FlowAnalyzer Viewer
- HydroViewer Pro$2.99
Questions
Is Lucky S free?
Is FlowAnalyzer Viewer free?
Do Lucky S or FlowAnalyzer Viewer have ads?
Which is updated more often, Lucky S or FlowAnalyzer Viewer?
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