# Interpolator vs CX

The clearest difference is price: Interpolator at Free against CX's $19.99. Interpolator also leads on rating (4.9 vs 3.7) and review sentiment (67% vs 36%). CX's advantage is chart position (#77 vs unranked). On ads, in-app purchases and device support there is nothing between them.

Interpolator is free to download; CX costs $19.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Interpolator holds the better App Store score, 4.9 against 3.7. That said, the two scores are not equally well evidenced: Interpolator has 74 ratings behind it against 11, so its average is the more settled of the two. Written reviews point the same way: 67% of Interpolator's written reviews are positive against 36% of CX's.

Interpolator ships an update every 4 months, CX every 8 months. The most recent releases landed on September 9, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | Interpolator | CX |
| --- | --- | --- |
| Price | **Free** | $19.99 |
| Rating | **[4.9 (74 ratings)](https://appshunter.io/ios/app/interpolator/id635235982/reviews)** | [3.7 (11 ratings)](https://appshunter.io/ios/app/cx-3-flight-computer/id1645428895/reviews) |
| Number of ratings | **74** | 11 |
| Positive reviews | **66.7% of reviews** | 35.7% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 8 months |
| Monetization | **Free** | Paid |
| Best chart rank | — | **#77** |
| Size | 18 MB | 3 MB |
| Requires iOS | **12.0** | 17.2 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | +4 | 4+ |
| Developer | [ron mooring](https://appshunter.io/developer/612283157) | [ASA](https://appshunter.io/developer/334278379) |

## What reviewers say

### Interpolator

[App page](https://appshunter.io/ios/app/interpolator/id635235982)

Easily find values within tables using interpolation for two or three rows. This utility app simplifies calculations without needing a separate calculator, making it ideal for various table-based environments.

**Highlights:** Two-row interpolation, Three-row interpolation, Table value lookup, No calculator needed, Cargo surveyor tool, General table use

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

**In-app purchases:** none


### CX

[App page](https://appshunter.io/ios/app/cx-3-flight-computer/id1645428895)

**Currently charting:** #77 Top Paid · Utilities (US App Store)

This aviation tool simplifies flight planning for pilots. It offers accurate calculations for time, speed, distance, fuel, and more, along with unit conversions and a built-in calculator. Designed for ease of use, it guides users through flight planning and execution with a natural menu flow.

**Highlights:** Flight planning calculations, Time, speed, distance functions, Fuel and altitude calculations, Unit conversions (12 categories), Weight and balance calculations, Holding pattern details, Built-in calculator, clock, timer

**In-app purchases:** none


## Frequently asked questions

### Is Interpolator free?

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

### Is CX free?

CX costs $19.99, with no in-app purchases.

### Which has better reviews, Interpolator or CX?

Interpolator is rated higher. Interpolator averages 4.9 out of 5 from 74 ratings, while CX averages 3.7 from 11 ratings.

### Do Interpolator or CX have ads?

Neither Interpolator nor CX shows ads.

### Which is updated more often, Interpolator or CX?

Interpolator ships an update every 4 months, and CX every 8 months. Most recently, Interpolator was updated on September 9, 2026 and CX on September 25, 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.*