DD Mate vs HydroCalc Basic
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
DD Mate
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The app allows you to connect to a DigiDevice NEXT device to display the measured weight. For certain models, additional functions can be controlled, depending on the specifications.
HydroCalc Basic
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Pipe Headloss Calculator provides engineers, designers, and students with powerful tools for pipeline hydraulic analysis β without the hassle of complex manual computations. Whether youβre sizing new pipelines or analyzing existing systems, the app delivers rapid, accurate results. Key Features Automatic Unit Conversion β Seamlessly switch between US Customary and SI units for length, flow, and diameter. Pipeline-Specific Inputs β Enter pipeline length, flow rate, internal diameter, and pipe material. Powerful Inverse Calculator β 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 β from the classroom to the field.
Screenshots
Verdict
The clearest difference is in-app purchases: DD Mate at none against HydroCalc Basic's 1. HydroCalc Basic's advantage is update cadence (every 11 days vs every 8 months). On price, ads, device support and iOS requirement there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. HydroCalc Basic sells 1 one-off in-app purchase. DD Mate asks for nothing beyond the download.
DD Mate ships an update every 8 months, HydroCalc Basic every 11 days. The most recent releases landed on September 30, 2026 and October 4, 2026 respectively.
| Parameter | DD Mate | HydroCalc Basic |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 8 months | Every 11 days β better |
| Ads | No | No |
| In-app purchases | No β better | Yes |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.6 | 15.1 β better |
| Further details β not scored | ||
| Size | 31 MB | 35 MB |
| Age rating | 4+ | 4+ |
| Developer | DigiDevice Srl | Transparent Blue Water LLC |
In-app purchases
DD Mate
No in-app purchases
HydroCalc Basic
- Premium - Flow Units & Ad-Free$1.99
Questions
Is DD Mate free?
Is HydroCalc Basic free?
Do DD Mate or HydroCalc Basic have ads?
Which is updated more often, DD Mate or HydroCalc Basic?
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