Comparison

Interpolator vs CX

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

Head to head
About

Interpolator

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
Read full description

This is a small app which makes it very easy to look up values in tables (math etc) when you have to interpolate both in two and in three rows. No more need for a calculator to interpolate manually. This app was designed primarily for cargo surveyors working with tank calibration tables, but the app does have its application in any environment where tables are used. As of 13th January 2015, this app has become FREE until further notice.

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

Interpolator4 screens
CX4 screens

Verdict

The call

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 (#71 vs unranked). On ads, in-app purchases and device support 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

Interpolator 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

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.

UpkeepUpdate frequency

Interpolator ships an update every 4 months, CX every 8 months. The most recent releases landed on September 9, 2026 and September 22, 2026 respectively.

Scorecard8 real differences · 3 level
Interpolator versus CX: the parameters behind the verdict, then further details
ParameterInterpolatorCX
PriceFree — better$19.99
Rating4.9 (74 ratings) — better3.7 (11 ratings)
Positive reviews66.7% of reviews — better35.7% of reviews
Number of ratings74 — better11
Update frequencyEvery 4 months — betterEvery 8 months
AdsNoNo
In-app purchasesNoNo
MonetizationFree — betterPaid
Best chart rank—#71 — better
DevicesiPhone, iPodiPhone, iPad
Requires iOS12.0 — better17.2
Further details — not scored
Size18 MB3 MB
Age rating+44+
Developerron mooringASA

Customer experience

Interpolator

All ratings74 ratings
Positive95.9%
Neutral4.1%
Negative0.0%
Written reviews3 reviews
Positive66.7%
Neutral33.3%
Negative0.0%

CX

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

In-app purchases

None

Interpolator

No in-app purchases

None

CX

No in-app purchases

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 22, 2026.

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