# Linear Interpolation Master vs Flight Stamp Pro

The clearest difference is price: Linear Interpolation Master at Free against Flight Stamp Pro's $1.99. Linear Interpolation Master also leads on iOS requirement (11.0 vs 16.6). Flight Stamp Pro's advantage is ads (none vs shown) and update cadence (every 5 days vs every 5 months). On in-app purchases and device support there is nothing between them.

Linear Interpolation Master is free to download; Flight Stamp Pro costs $1.99 up front. Linear Interpolation Master sells 3 one-off in-app purchases and Flight Stamp Pro sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Linear Interpolation Master ships an update every 5 months, Flight Stamp Pro every 5 days. The most recent releases landed on September 22, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | Linear Interpolation Master | Flight Stamp Pro |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| 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 | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 5 months | **Every 5 days** |
| Monetization | Free with in-app purchases | — |
| Size | 16 MB | 5 MB |
| Requires iOS | **11.0** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [VERVE TECHNOLOGIES PTY. LTD.](https://appshunter.io/developer/582523354) | [Christian Cuenca](https://appshunter.io/developer/1824650881) |

## 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 |


### Flight Stamp Pro

[App page](https://appshunter.io/ios/app/flight-stamp-pro/id6748744275)

**Features:** Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Times Up Flight-Pro | Free | one-time |


## Frequently asked questions

### Is Linear Interpolation Master free?

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

### Is Flight Stamp Pro free?

Flight Stamp Pro costs $1.99, and also offers in-app purchases.

### Do Linear Interpolation Master or Flight Stamp Pro have ads?

Linear Interpolation Master shows ads; Flight Stamp Pro does not.

### Which is updated more often, Linear Interpolation Master or Flight Stamp Pro?

Linear Interpolation Master ships an update every 5 months, and Flight Stamp Pro every 5 days. Most recently, Linear Interpolation Master was updated on September 22, 2026 and Flight Stamp Pro on September 14, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*