# AxiomXA Mobile vs HydroCalc Basic

The clearest difference is in-app purchases: AxiomXA Mobile at none against HydroCalc Basic's 1. AxiomXA Mobile also leads on iOS requirement (13.0 vs 15.1). HydroCalc Basic's advantage is update cadence (every 11 days vs every 3 months). On price, ads and device support there is nothing between them.

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

AxiomXA Mobile ships an update every 3 months, HydroCalc Basic every 11 days. The most recent releases landed on November 7, 2026 and November 8, 2026 respectively.

## The numbers

| Metric | AxiomXA Mobile | HydroCalc Basic |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/hydrocalc-basic/id6752577110/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 11 days** |
| Monetization | — | Free with in-app purchases |
| Size | 20 MB | 35 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [RBH Access Technologies](https://appshunter.io/developer/1213335357) | [Transparent Blue Water LLC](https://appshunter.io/developer/1847968351) |

## What reviewers say

### AxiomXA Mobile

[App page](https://appshunter.io/ios/app/axiomxa-mobile/id1489349570)

**Features:** macOS Compatibility

**In-app purchases:** none


### HydroCalc Basic

[App page](https://appshunter.io/ios/app/hydrocalc-basic/id6752577110)

This app simplifies complex pipeline hydraulic analysis for engineers, designers, and students. It offers rapid, accurate calculations for head loss, flow velocity, and system curves, with automatic unit conversion and pipeline-specific inputs.

**Highlights:** Automatic unit conversion (US Customary/SI), Pipeline-specific inputs, Inverse calculator for target head loss, View flow velocity and friction head loss, Full system curve data

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Pack | $5.99 | one-time |


## Frequently asked questions

### Is AxiomXA Mobile free?

AxiomXA Mobile 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 AxiomXA Mobile or HydroCalc Basic have ads?

Neither AxiomXA Mobile nor HydroCalc Basic shows ads.

### Which is updated more often, AxiomXA Mobile or HydroCalc Basic?

AxiomXA Mobile ships an update every 3 months, and HydroCalc Basic every 11 days. Most recently, AxiomXA Mobile was updated on November 7, 2026 and HydroCalc Basic on November 8, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*