# Linear Interpolation Master vs Interp Calculator

The clearest difference is price: Linear Interpolation Master at Free against Interp Calculator's $0.99. Linear Interpolation Master also leads on update cadence (every 5 months vs every 15 months) and iOS requirement (11.0 vs 15.0). Interp Calculator's advantage is in-app purchases (none vs 3) and ads (none vs shown). On device support there is nothing between them.

Linear Interpolation Master is free to download; Interp Calculator costs $0.99 up front. Linear Interpolation Master sells 3 one-off in-app purchases. Interp Calculator asks for nothing beyond the download.

Linear Interpolation Master ships an update every 5 months, Interp Calculator every 15 months. The most recent releases landed on October 14, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Linear Interpolation Master | Interp Calculator |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | **[4.7 (176 ratings)](https://appshunter.io/ios/app/linear-interpolation-master/id1433976994/reviews)** | — |
| Number of ratings | **176** | — |
| Positive reviews | 62.5% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 5 months** | Every 15 months |
| Monetization | Free with in-app purchases | — |
| Size | 16 MB | 22 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [VERVE TECHNOLOGIES PTY. LTD.](https://appshunter.io/developer/582523354) | [Stanislav Soroka](https://appshunter.io/developer/1701402639) |

## What reviewers say

### 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 |


### Interp Calculator

[App page](https://appshunter.io/ios/app/interp-calculator/id6747821560)

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

**In-app purchases:** none


## Frequently asked questions

### Is Linear Interpolation Master free?

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

### Is Interp Calculator free?

Interp Calculator costs $0.99, with no in-app purchases.

### Do Linear Interpolation Master or Interp Calculator have ads?

Linear Interpolation Master shows ads; Interp Calculator does not.

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

Linear Interpolation Master ships an update every 5 months, and Interp Calculator every 15 months. Most recently, Linear Interpolation Master was updated on October 14, 2026 and Interp Calculator on October 6, 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.*