# 3D Interpolation vs SCR MAXFLO™

The clearest difference is price: SCR MAXFLO™ at Free against 3D Interpolation's $9.99. SCR MAXFLO™ also leads on update cadence (every 11 months vs every 37 months). 3D Interpolation's advantage is device support (3 vs 1) and iOS requirement (12.0 vs 16.6). On ads and in-app purchases there is nothing between them.

SCR MAXFLO™ is free to download; 3D Interpolation costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

3D Interpolation ships an update every 37 months, SCR MAXFLO™ every 11 months. The most recent releases landed on September 2, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | 3D Interpolation | SCR MAXFLO™ |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Rating | — | **[4.6 (5 ratings)](https://appshunter.io/ios/app/scr-maxflo/id1077499630/reviews)** |
| Number of ratings | — | **5** |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 37 months | **Every 11 months** |
| Monetization | Paid | **Free** |
| Size | 7 MB | 7 MB |
| Requires iOS | **12.0** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Carlos Moura](https://appshunter.io/developer/407501202) | [Southwire Company](https://appshunter.io/developer/440338423) |

## What reviewers say

### 3D Interpolation

[App page](https://appshunter.io/ios/app/3d-interpolation/id1000298349)

Calculate key directional drilling parameters like TVD, coordinates, and displacement. This tool aids drilling engineers and students in oil well directional drilling by interpolating survey data.

**Highlights:** Calculate TVD, N/S, E/W coordinates, Determine Horizontal Displacement, Calculate Dog-Leg Severity, Measure Build-Up Rate, Calculate Turn Rate, Interpolate parameters between survey stations

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

**In-app purchases:** none


### SCR MAXFLO™

[App page](https://appshunter.io/ios/app/scr-maxflo/id1077499630)

This app calculates pressure drop, fluid velocity, Reynold's number, and friction factor for liquids and gases. It allows users to create custom projects, manage pipes, fluids, and fittings, and supports both metric and imperial units for efficient on-site work.

**Highlights:** Pressure drop calculation, Fluid velocity calculation, Reynold's number calculation, Friction factor calculation, Custom project creation, Pipe, fluid, and fitting management, Metric and imperial unit support

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 3D Interpolation free?

3D Interpolation costs $9.99, with no in-app purchases.

### Is SCR MAXFLO™ free?

SCR MAXFLO™ is free to download, with no in-app purchases.

### Do 3D Interpolation or SCR MAXFLO™ have ads?

Neither 3D Interpolation nor SCR MAXFLO™ shows ads.

### Which is updated more often, 3D Interpolation or SCR MAXFLO™?

3D Interpolation ships an update every 37 months, and SCR MAXFLO™ every 11 months. Most recently, 3D Interpolation was updated on September 2, 2026 and SCR MAXFLO™ on September 9, 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.*