Keystone Pump TDH Calculator vs DP
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
DP
This tool helps users configure and select DP pumps for their specific applications. It provides detailed product information, including technical specifications, hydraulic curves, and dimensions, based on your selection criteria.
- Intuitive product configuration
- Selection via hydraulic data (Q, H)
- Replacement product comparison
- Direct pump type selection
- Technical specification sheets
- Hydraulic curves
- Dimensions and drawings
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DP Select is the official product selection tool of DP pumps. This selection tool assists you with an intuitive product configuration for your application. Detailed product information is provided as result of your selection. Set-up product selection • Selecting via hydraulic data Q, H • Selecting a replacement product via Compare • Direct product selection via Pump type Provided product information • Technical specification sheet • Hydraulic curves • Dimensions / drawings • Motor data
Screenshots
Verdict
The clearest difference is rating: Keystone Pump TDH Calculator at 5.0 against DP's 4.0. Keystone Pump TDH Calculator also leads on update cadence (every 6 months vs every 16 months). DP's advantage is device support (3 vs 1) and iOS requirement (13.0 vs 17.6). On price, ratings volume, ads and in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
Keystone Pump TDH Calculator holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively.
Keystone Pump TDH Calculator ships an update every 6 months, DP every 16 months. The most recent releases landed on May 31, 2026 and July 9, 2026 respectively.
| Parameter | Keystone Pump TDH Calculator | DP |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | 4.0 (1 ratings) |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 1 | 1 |
| Update frequency | Every 6 months — better | Every 16 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone | iPhone, iPad, iPod — better |
| Requires iOS | 17.6 | 13.0 — better |
| Further details — not scored | ||
| Size | 3 MB | 15 MB |
| Age rating | 4+ | 4+ |
| Developer | Keystone Pumps LTD | DP Pumps |
Customer experience
Keystone Pump TDH Calculator
DP
In-app purchases
Keystone Pump TDH Calculator
No in-app purchases
DP
No in-app purchases
Questions
Is Keystone Pump TDH Calculator free?
Is DP free?
Which has better reviews, Keystone Pump TDH Calculator or DP?
Do Keystone Pump TDH Calculator or DP have ads?
Which is updated more often, Keystone Pump TDH Calculator or DP?
Other comparisons
