Comparison

DD Mate vs HydroCalc Basic

Price, ratings, monetisation and update history for both apps, side by side β€” with what reviewers say about each.

Head to head
About

DD Mate

Features
Read full description

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.

About

HydroCalc Basic

Features
Read full description

Pipe Headloss Calculator provides engineers, designers, and students with powerful tools for pipeline hydraulic analysis β€” 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 β€” from the classroom to the field.

Screenshots

DD Mate4 screens
HydroCalc Basic4 screens

Verdict

The call

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

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. HydroCalc Basic sells 1 one-off in-app purchase. DD Mate asks for nothing beyond the download.

UpkeepUpdate frequency

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.

Scorecard2 real differences Β· 4 level
DD Mate versus HydroCalc Basic: the parameters behind the verdict, then further details
ParameterDD MateHydroCalc Basic
PriceFreeFree
Update frequencyEvery 8 monthsEvery 11 days β€” better
AdsNoNo
In-app purchasesNo β€” betterYes
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.615.1 β€” better
Further details β€” not scored
Size31 MB35 MB
Age rating4+4+
DeveloperDigiDevice SrlTransparent Blue Water LLC

In-app purchases

None

DD Mate

No in-app purchases

1 purchases

HydroCalc Basic

One-time1
  • Premium - Flow Units & Ad-Free$1.99

Questions

Is DD Mate free?
DD Mate is free to download, with no in-app purchases.
Is HydroCalc Basic free?
HydroCalc Basic is free to download, with in-app purchases available.
Do DD Mate or HydroCalc Basic have ads?
Neither DD Mate nor HydroCalc Basic shows ads.
Which is updated more often, DD Mate or HydroCalc Basic?
DD Mate ships an update every 8 months, and HydroCalc Basic every 11 days. Most recently, DD Mate was updated on September 30, 2026 and HydroCalc Basic on October 4, 2026.

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