Getting Started
An on-device pump-system workbench for plotting duty points, testing operating changes, and screening available versus required net positive suction head.
Support
NPSHgraph Support
Help and product information for NPSHgraph.
Included Tools
- Pump and system curve intersection
- NPSH margin and sensitivity checks
- Forty bundled pump-reference plates
Common Questions
Does the app need an account or subscription?
No. It is a one-time-purchase app with no account, advertising, analytics, or in-app purchase.
Does it work offline?
Core features and bundled reference data work on device without a developer-operated service.
Where is my information stored?
Your pump inputs, saved duty cases, comparison choices, and display preferences remain in the app's local storage.
How do I remove local data?
Use available delete or reset controls. Removing the app removes its local container, subject to backups you control through Apple.
What are the limits?
Results are engineering planning aids. Confirm manufacturer curves, fluid properties, site elevation, piping conditions, and required safety margins.
Contact
Email support@shadowfetch.com with the app name, device model, iOS version, and a concise description of the issue.