HydroCalc Basic vs Aeshna
Price, ratings, monetisation and update history for both apps, side by side — 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 — 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 — from the classroom to the field.
Aeshna
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Aeshna is a professional CAD viewer and inspection tool for STEP and IGES files. Open, inspect, measure, and review 3D models directly on your device — no account required and no cloud upload. KEY FEATURES • STEP & IGES Support Open STEP, STP, IGES, and IGS files directly on your iPhone or iPad. • Assembly Tree Navigate assembly structures, inspect components, and control model visibility. • Section View Cut through models to inspect internal geometry and hidden details. • Exploded View Separate assembly components to better understand structure and relationships. • Precision B-Rep Measurement Measure distances, angles, areas, and volumes directly from B-Rep geometry. • PMI Support View dimensions, tolerances, datums, and other PMI information stored in STEP files. • Screenshot Markup Add drawings, shapes, and notes to model screenshots for review and sharing. • Multi-Format Export Export models to STEP, IGES, STL, OBJ, glTF, VRML, and other common formats. • Large Model Processing Use a paired Mac to process CAD models too large for your iPhone or iPad, then seamlessly continue viewing them on your device. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is update cadence: HydroCalc Basic at every 11 days against Aeshna's every 6 weeks. HydroCalc Basic also leads on iOS requirement (15.1 vs 18.6). On price, ads, in-app purchases and device support 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. HydroCalc Basic sells 1 one-off in-app purchase and Aeshna sells 10 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.
HydroCalc Basic ships an update every 11 days, Aeshna every 6 weeks. The most recent releases landed on November 8, 2026 and November 5, 2026 respectively.
| Parameter | HydroCalc Basic | Aeshna |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 11 days — better | Every 6 weeks |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Requires iOS | 15.1 — better | 18.6 |
| Further details — not scored | ||
| Size | 35 MB | 57 MB |
| Age rating | 4+ | 4+ |
| Developer | Transparent Blue Water LLC | Shenzhen Seize Times E-Commerce Co., Ltd. |
In-app purchases
HydroCalc Basic
- Pro Pack$5.99
Aeshna
- Aeshna Pro (Monthly)$4.991 Month
- Viewra BIMs (Monthly)$4.991 Month
- Viewra Complete (Monthly)$6.991 Month
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- Aeshna Pro (1 Year)$34.991 Year
- Viewra BIMs (Monthly)$34.991 Year
- Viewra Drawings (Lifetime)$39.99
- Aeshna Pro (Lifetime)$69.99
- Viewra Models (Lifetime)$69.99
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- Viewra BIMs (Lifetime)$69.99
- Viewra Complete (Lifetime)$99.99
Questions
Is HydroCalc Basic free?
Is Aeshna free?
Do HydroCalc Basic or Aeshna have ads?
Which is updated more often, HydroCalc Basic or Aeshna?
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