Comparison

Interpolation 1.4 vs CX

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Interpolation 1.4

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
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** INTERPOLATION ** Interpolation is used to calculate a linear or a quadratic interpolation.

About

CX

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
Currently charting
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Based on the ASA CX-3® Flight Computer for pilots, this CX-3 app makes flight planning simple by taking confusion out of the equation. Fast, versatile and easy to use, the CX-3® delivers accurate results quickly and efficiently. Whether used for flight planning, ground school, or FAA Knowledge Exam preparation, the menu organization reflects the order in which a flight is normally planned and executed, resulting in a natural flow from one function to the next with a minimum of keystrokes. Multiple aviation functions can be performed on the CX-3® flight computer including those related to time, speed, distance, heading, wind, fuel, altitude, cloud base, standard atmosphere, glide, climb & descent, weight & balance, as well as a holding pattern function to help determine entry method and holding details. The CX-3® has 12 unit-conversions: Distance, Speed, Duration, Temperature, Pressure, Volume, Rate, Weight, Rate of Climb/Descent, Angle of Climb/Descent, Torque, and Angle. These 12 conversion categories contain 38 different conversion factors for over 100 functions. A calculator, clock, timer, and stopwatch are also built in along with multiple settings for lighting, backlighting, themes, time zones and more.

Screenshots

Interpolation 1.42 screens
CX4 screens

Verdict

The call

The clearest difference is price: Interpolation 1.4 at Free against CX's $19.99. Interpolation 1.4 also leads on update cadence (every 3 weeks vs every 8 months) and iOS requirement (9.0 vs 17.2). CX's advantage is rating (3.7 vs 3.5) and chart position (#62 vs unranked). On review sentiment, ratings volume, ads and in-app purchases there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Interpolation 1.4 is free to download; CX costs $19.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

CX holds the better App Store score, 3.7 against 3.5. Both are backed by a comparable volume of ratings — 6 and 11 respectively. Written reviews point the same way: 33% of Interpolation 1.4's written reviews are positive against 36% of CX's.

UpkeepUpdate frequency

Interpolation 1.4 ships an update every 3 weeks, CX every 8 months. The most recent releases landed on September 17, 2026 and October 13, 2026 respectively.

Scorecard6 real differences · 5 level
Interpolation 1.4 versus CX: the parameters behind the verdict, then further details
ParameterInterpolation 1.4CX
PriceFree — better$19.99
Rating3.5 (6 ratings)3.7 (11 ratings) — better
Positive reviews33.3% of reviews35.7% of reviews — better
Number of ratings611 — better
Update frequencyEvery 3 weeks — betterEvery 8 months
AdsNoNo
In-app purchasesNoNo
MonetizationFree — betterPaid
Best chart rank—#62 — better
DevicesiPhone, iPodiPhone, iPad
Requires iOS9.0 — better17.2
Further details — not scored
Size1 MB3 MB
Age rating4+4+
DeveloperZOFTERMASA

Customer experience

Interpolation 1.4

All ratings6 ratings
Positive50.0%
Neutral16.7%
Negative33.3%
Written reviews6 reviews
Positive33.3%
Neutral16.7%
Negative50.0%

CX

All ratings11 ratings
Positive63.6%
Neutral9.1%
Negative27.3%
Written reviews14 reviews
Positive35.7%
Neutral7.1%
Negative57.1%

In-app purchases

None

Interpolation 1.4

No in-app purchases

None

CX

No in-app purchases

Questions

Is Interpolation 1.4 free?
Interpolation 1.4 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, Interpolation 1.4 or CX?
CX is rated higher. Interpolation 1.4 averages 3.5 out of 5 from 6 ratings, while CX averages 3.7 from 11 ratings.
Do Interpolation 1.4 or CX have ads?
Neither Interpolation 1.4 nor CX shows ads.
Which is updated more often, Interpolation 1.4 or CX?
Interpolation 1.4 ships an update every 3 weeks, and CX every 8 months. Most recently, Interpolation 1.4 was updated on September 17, 2026 and CX on October 13, 2026.

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