Keystone Pump TDH Calculator vs HydroCalc Basic
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Keystone Pump TDH Calculator
This utility app assists engineers and technical personnel in calculating system parameters for slurry pipe and pump sizing. It computes required head pressure and limiting settling velocity based on user-inputted system data. The tool aims to simplify the selection process for slurry pumps.
- Slurry Density Calculation
- Limiting Settling Velocity Calculation
- Slurry Head & Equivalent Water Head Calculation
- Pipe Type and Size Database
- NPSHA Calculation
- US and Metric Units
- Save Calculation Results
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Keystone Pumps - Keystone Pump TDH Calculator was created to assist Engineers and Technical Personnel with system calculations required for the sizing of slurry pipe systems and slurry pumps. Our program allows the user to simply enter in basic system parameters and our program will calculate the required head pressure and limiting settling velocity. Our desire is to provide our customers with a dynamic tool that allows for ease of selecting slurry pumps. Features: • Supports iOS10 • Built in Slurry Density Calculation • Limiting Settling Velocity Calculation • Slurry Head & Equivalent Water Head Calculation • Built in Pipe Type and Size Database • Entry and Saving of Customer Pipe Sizes • Built in Pipe Fittings Visual Selection Database • Entry and Saving of Custom Pipe Fittings • NPSHA Calculation • US and Metric Units • Saving of Individual Calculation Results • E-Mailing of Individual Calculation Results
HydroCalc Basic
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Pipe Headloss Calculator provides engineers, designers, and students with powerful tools for pipeline hydraulic analysis — without the hassle of complex manual computations. Whether you’re sizing new pipelines or analyzing existing systems, the app delivers rapid, accurate results. Key Features Automatic Unit Conversion – Seamlessly switch between US Customary and SI units for length, flow, and diameter. Pipeline-Specific Inputs – Enter pipeline length, flow rate, internal diameter, and pipe material. Powerful Inverse Calculator – Set a target head loss and calculate the required diameter, flow, or length. Instantly view flow velocity, friction head loss, fitting losses, and full system curve data. With a clean interface and fast performance, this app is designed to save time and improve accuracy in hydraulic calculations — from the classroom to the field.
Screenshots
Verdict
The clearest difference is in-app purchases: Keystone Pump TDH Calculator at none against HydroCalc Basic's 1. HydroCalc Basic's advantage is update cadence (every 11 days vs every 6 months) and device support (3 vs 1). On price and ads 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. HydroCalc Basic sells 1 one-off in-app purchase. Keystone Pump TDH Calculator asks for nothing beyond the download.
Keystone Pump TDH Calculator ships an update every 6 months, HydroCalc Basic every 11 days. The most recent releases landed on October 16, 2026 and October 29, 2026 respectively.
| Parameter | Keystone Pump TDH Calculator | HydroCalc Basic |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 6 months | Every 11 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Devices | iPhone | iPhone, iPad, iPod — better |
| Requires iOS | 17.6 | 15.1 — better |
| Further details — not scored | ||
| Size | 3 MB | 35 MB |
| Age rating | 4+ | 4+ |
| Developer | Keystone Pumps LTD | Transparent Blue Water LLC |
In-app purchases
Keystone Pump TDH Calculator
No in-app purchases
HydroCalc Basic
- Pro Pack$5.99
Questions
Is Keystone Pump TDH Calculator free?
Is HydroCalc Basic free?
Do Keystone Pump TDH Calculator or HydroCalc Basic have ads?
Which is updated more often, Keystone Pump TDH Calculator or HydroCalc Basic?
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