# Interpolation 1.4 vs Linear Interpolation Master

The clearest difference is rating: Linear Interpolation Master at 4.7 against Interpolation 1.4's 3.5. Linear Interpolation Master also leads on review sentiment (63% vs 33%) and ratings volume (176 vs 6). Interpolation 1.4's advantage is in-app purchases (none vs 3) and ads (none vs shown). On price and device support there is nothing between them.

Both are free to download. Linear Interpolation Master sells 3 one-off in-app purchases. Interpolation 1.4 asks for nothing beyond the download.

Linear Interpolation Master holds the better App Store score, 4.7 against 3.5. That said, the two scores are not equally well evidenced: Linear Interpolation Master has 176 ratings behind it against 6, so its average is the more settled of the two. Written reviews point the same way: 33% of Interpolation 1.4's written reviews are positive against 63% of Linear Interpolation Master's.

Interpolation 1.4 ships an update every 3 weeks, Linear Interpolation Master every 5 months. The most recent releases landed on September 17, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Interpolation 1.4 | Linear Interpolation Master |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.5 (6 ratings)](https://appshunter.io/ios/app/interpolation-14/id557950545/reviews) | **[4.7 (176 ratings)](https://appshunter.io/ios/app/linear-interpolation-master/id1433976994/reviews)** |
| Number of ratings | 6 | **176** |
| Positive reviews | 33.3% of reviews | **62.5% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 3 weeks** | Every 5 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 1 MB | 16 MB |
| Requires iOS | **9.0** | 11.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [ZOFTERM](https://appshunter.io/developer/557950548) | [VERVE TECHNOLOGIES PTY. LTD.](https://appshunter.io/developer/582523354) |

## What reviewers say

### Interpolation 1.4

[App page](https://appshunter.io/ios/app/interpolation-14/id557950545)

This utility calculates linear or quadratic interpolations. It provides a straightforward tool for mathematical estimations based on given data points.

**Highlights:** Linear interpolation calculation, Quadratic interpolation calculation, Mathematical estimation tool

**Features:** macOS Compatibility

**In-app purchases:** none


### Linear Interpolation Master

[App page](https://appshunter.io/ios/app/linear-interpolation-master/id1433976994)

This tool simplifies linear interpolation calculations for industrial commissioning engineers. It features large, easily readable numbers for field use and allows for quick swapping of coordinate systems, such as converting between 4-20mA and 0-100% scales.

**Highlights:** Large number display for field visibility, Quickly swap X and Y coordinates, 4-20mA to 0-100% conversion, 0-100% to 4-20mA conversion

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Generous Tip | $2.99 | one-time |
| Massive Tip | $3.99 | one-time |
| Amazing Tip | $4.99 | one-time |


## Frequently asked questions

### Is Interpolation 1.4 free?

Interpolation 1.4 is free to download, with no in-app purchases.

### Is Linear Interpolation Master free?

Linear Interpolation Master is free to download, with in-app purchases available.

### Which has better reviews, Interpolation 1.4 or Linear Interpolation Master?

Linear Interpolation Master is rated higher. Interpolation 1.4 averages 3.5 out of 5 from 6 ratings, while Linear Interpolation Master averages 4.7 from 176 ratings.

### Do Interpolation 1.4 or Linear Interpolation Master have ads?

Linear Interpolation Master shows ads; Interpolation 1.4 does not.

### Which is updated more often, Interpolation 1.4 or Linear Interpolation Master?

Interpolation 1.4 ships an update every 3 weeks, and Linear Interpolation Master every 5 months. Most recently, Interpolation 1.4 was updated on September 17, 2026 and Linear Interpolation Master on October 14, 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.*