# HydroCalc Plus vs Nearby Chat Pro

The clearest difference is price: Nearby Chat Pro at Free against HydroCalc Plus's $6.99. Nearby Chat Pro also leads on update cadence (every 5 days vs every 3 weeks). HydroCalc Plus's advantage is ads (none vs shown) and iOS requirement (15.1 vs 17.6). On rating, ratings volume, in-app purchases and device support there is nothing between them.

Nearby Chat Pro is free to download; HydroCalc Plus costs $6.99 up front. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 5.0 for HydroCalc Plus against 5.0 for Nearby Chat Pro. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

HydroCalc Plus ships an update every 3 weeks, Nearby Chat Pro every 5 days. The most recent releases landed on November 1, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | HydroCalc Plus | Nearby Chat Pro |
| --- | --- | --- |
| Price | $6.99 | **Free** |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/hydrocalc-plus/id578807688/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/nearby-chat-pro/id6746174788/reviews) |
| Number of ratings | 1 | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 3 weeks | **Every 5 days** |
| Monetization | Paid | **Free** |
| Size | 34 MB | 11 MB |
| Requires iOS | **15.1** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Transparent Blue Water LLC](https://appshunter.io/developer/1847968351) | [午尧 杨](https://appshunter.io/developer/1682829051) |

## What reviewers say

### HydroCalc Plus

[App page](https://appshunter.io/ios/app/hydrocalc-plus/id578807688)

A professional tool for hydraulic engineers to calculate pressure losses in piping systems. It supports US and SI units, offers an extensive pipe material and fittings database, and includes inverse calculations for design optimization.

**Highlights:** Friction head loss calculation (Hazen-Williams), US and SI unit support, Extensive pipe material library, Fittings and valves database, Inverse calculation mode, Real-time results (velocity, losses)

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

**In-app purchases:** none


### Nearby Chat Pro

[App page](https://appshunter.io/ios/app/nearby-chat-pro/id6746174788)

Facilitate real-time collaboration on Apple devices with instant messaging and a shared drawing canvas. Communicate locally without an internet connection, with all data saved automatically. Stay connected seamlessly with background task support for uninterrupted interaction.

**Highlights:** Real-time text, photo, voice, and video messaging, Shared collaborative whiteboard, Device-to-device communication (no internet needed), Local data storage, Background connection maintenance, Seamless reconnection

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

**In-app purchases:** none


## Frequently asked questions

### Is HydroCalc Plus free?

HydroCalc Plus costs $6.99, with no in-app purchases.

### Is Nearby Chat Pro free?

Nearby Chat Pro is free to download, with no in-app purchases.

### Which has better reviews, HydroCalc Plus or Nearby Chat Pro?

HydroCalc Plus and Nearby Chat Pro are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do HydroCalc Plus or Nearby Chat Pro have ads?

Nearby Chat Pro shows ads; HydroCalc Plus does not.

### Which is updated more often, HydroCalc Plus or Nearby Chat Pro?

HydroCalc Plus ships an update every 3 weeks, and Nearby Chat Pro every 5 days. Most recently, HydroCalc Plus was updated on November 1, 2026 and Nearby Chat Pro on October 30, 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.*