Comparison

HydroCalc Basic vs GRAAS

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

Head to head
About

HydroCalc Basic

Features
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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 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.

About

GRAAS

Features
Read full description

Automate your irrigation with GRAAS. The GRAAS app is designed to give you full control of your irrigation system from your smartphone. Whether you manage a greenhouse, garden, lawn, or farm, GRAAS helps you monitor conditions, automate watering, and make data-driven decisions to improve plant health and reduce water waste. With the GRAAS app, you can: β€’ Set and adjust irrigation schedules by day, time, and water amount β€’ Choose between automatic and manual irrigation modes β€’ Remotely control your irrigation system from anywhere β€’ Monitor real-time soil moisture levels β€’ Track air temperature and humidity β€’ View water system pressure data β€’ Access historical data and clear visual charts for better analysis β€’ Manage multiple irrigation zones individually The app allows you to tailor irrigation settings and divide them into zones according to plant type, growing area, and specific environmental needs. By using real-time and historical data, you can optimize watering, prevent over-irrigation, and ensure consistent growing conditions. GRAAS is suitable for: β€’ Home garden and lawn owners β€’ Greenhouse growers β€’ Professional horticulture operations β€’ Small and medium-sized farms β€’ Irrigation system installers and managers The GRAAS app works with GRAAS irrigation controllers and requires compatible hardware. Take control of your irrigation system, reduce water consumption, and grow more efficiently with GRAAS.

Screenshots

HydroCalc Basic4 screens
GRAAS4 screens

Verdict

The call

The clearest difference is in-app purchases: GRAAS at none against HydroCalc Basic's 1. On price, update cadence, ads and device support 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. GRAAS asks for nothing beyond the download.

UpkeepUpdate frequency

HydroCalc Basic ships an update every 11 days, GRAAS every 3 weeks. The most recent releases landed on October 4, 2026 and October 7, 2026 respectively.

Scorecard1 real difference Β· 5 level
HydroCalc Basic versus GRAAS: the parameters behind the verdict, then further details
ParameterHydroCalc BasicGRAAS
PriceFreeFree
Update frequencyEvery 11 days β€” betterEvery 3 weeks
AdsNoNo
In-app purchasesYesNo β€” better
DevicesiPhone, iPad, iPod β€” betteriPhone, iPod
Requires iOS15.115.1
Further details β€” not scored
Size35 MB30 MB
Age rating4+4+
DeveloperTransparent Blue Water LLCvilius Marcinkus

In-app purchases

1 purchases

HydroCalc Basic

One-time1
  • Premium - Flow Units & Ad-Free$1.99
None

GRAAS

No in-app purchases

Questions

Is HydroCalc Basic free?
HydroCalc Basic is free to download, with in-app purchases available.
Is GRAAS free?
GRAAS is free to download, with no in-app purchases.
Do HydroCalc Basic or GRAAS have ads?
Neither HydroCalc Basic nor GRAAS shows ads.
Which is updated more often, HydroCalc Basic or GRAAS?
HydroCalc Basic ships an update every 11 days, and GRAAS every 3 weeks. Most recently, HydroCalc Basic was updated on October 4, 2026 and GRAAS on October 7, 2026.

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