HydroCalc Basic vs GRAAS
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
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.
GRAAS
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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
Verdict
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
Both are free to download. HydroCalc Basic sells 1 one-off in-app purchase. GRAAS asks for nothing beyond the download.
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.
| Parameter | HydroCalc Basic | GRAAS |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 11 days β better | Every 3 weeks |
| Ads | No | No |
| In-app purchases | Yes | No β better |
| Devices | iPhone, iPad, iPod β better | iPhone, iPod |
| Requires iOS | 15.1 | 15.1 |
| Further details β not scored | ||
| Size | 35 MB | 30 MB |
| Age rating | 4+ | 4+ |
| Developer | Transparent Blue Water LLC | vilius Marcinkus |
In-app purchases
HydroCalc Basic
- Premium - Flow Units & Ad-Free$1.99
GRAAS
No in-app purchases
Questions
Is HydroCalc Basic free?
Is GRAAS free?
Do HydroCalc Basic or GRAAS have ads?
Which is updated more often, HydroCalc Basic or GRAAS?
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