# Radius Maps vs Fluid Mechanics Calc

The clearest difference is rating: Fluid Mechanics Calc at 5.0 against Radius Maps's 2.2. Fluid Mechanics Calc also leads on in-app purchases (none vs 1). Radius Maps's advantage is update cadence (every 3 months vs every 22 months) and iOS requirement (9.3 vs 15.6). On price, ratings volume, ads and device support there is nothing between them.

Both are free to download. Radius Maps sells 1 in-app purchase, starting at $4.99 per month. Fluid Mechanics Calc asks for nothing beyond the download.

Fluid Mechanics Calc holds the better App Store score, 5.0 against 2.2. Both are backed by a comparable volume of ratings — 6 and 3 respectively.

Radius Maps ships an update every 3 months, Fluid Mechanics Calc every 22 months. The most recent releases landed on October 24, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Radius Maps | Fluid Mechanics Calc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.2 (6 ratings)](https://appshunter.io/ios/app/radius-maps/id1339176494/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/fluid-mechanics-calc/id1404879538/reviews)** |
| Number of ratings | **6** | 3 |
| Positive reviews | 25.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 22 months |
| Monetization | Freemium | **Free** |
| Size | 29 MB | 108 MB |
| Requires iOS | **9.3** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Truewhoo Network Technology](https://appshunter.io/developer/1063035683) | [Trelleborg Sealing Solutions](https://appshunter.io/developer/396863758) |

## What reviewers say

### Radius Maps

[App page](https://appshunter.io/ios/app/radius-maps/id1339176494)

Visualize and manage location-based radii on maps. This tool helps in planning travel, retail expansion, property searches, or understanding potential proximity. It allows for combining multiple coverage areas and managing important locations with a privacy-first approach.

**Highlights:** Visualize radius coverage from a location, Combine multiple coverage areas, Manage important locations, Privacy-first policy for data syncing, Location planning and exploration

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Radius - All Access | $4.99 | per month |


### Fluid Mechanics Calc

[App page](https://appshunter.io/ios/app/fluid-mechanics-calc/id1404879538)

This utility app provides a comprehensive calculator for fluid mechanics, civil, and structural engineering parameters. It offers over 130 formulas and 360 calculation methods, supporting seamless unit system switching for analysis, design, and operation of fluid-related systems.

**Highlights:** 130+ fluid mechanics formulas, 360+ calculation methods, Unit system conversion (metric/US), Favorite formula marking, High mathematical precision, Seamless unit switching

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Radius Maps free?

Radius Maps is free to download, with in-app purchases available.

### Is Fluid Mechanics Calc free?

Fluid Mechanics Calc is free to download, with no in-app purchases.

### Which has better reviews, Radius Maps or Fluid Mechanics Calc?

Fluid Mechanics Calc is rated higher. Radius Maps averages 2.2 out of 5 from 6 ratings, while Fluid Mechanics Calc averages 5.0 from 3 ratings.

### Do Radius Maps or Fluid Mechanics Calc have ads?

Neither Radius Maps nor Fluid Mechanics Calc shows ads.

### Which is updated more often, Radius Maps or Fluid Mechanics Calc?

Radius Maps ships an update every 3 months, and Fluid Mechanics Calc every 22 months. Most recently, Radius Maps was updated on October 24, 2026 and Fluid Mechanics Calc on October 12, 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.*