Interpolator vs xWind
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- Two-row interpolation
- Three-row interpolation
- Table value lookup
- No calculator needed
- Cargo surveyor tool
- General table use
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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.
xWind
This tool helps pilots quickly assess wind conditions relative to aircraft limitations. It displays essential wind data, including headwind, crosswind, and tailwind components, along with runway course and wind limits on a single screen for easy reference during flight.
- Headwind, crosswind, and tailwind calculation
- Displays current wind direction and speed
- Shows runway course
- Indicates applied wind limits
- Identifies 'forbidden' wind angles
- Provides maximum wind speed table
- Adjustable wind and runway settings
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xWind is an easy to use tool to assist pilots in evaluating wind conditions with respect to head, cross and tailwind limitations. Once setup, the xWind app provides all information in one single screen, requiring minimal user interaction during high workload phases of flight, displaying: - Current wind direction and speed - Runway course - Cross and head or tailwind components - Currently applied wind limits - 'Forbidden' wind angles based on the current wind speed - Maximum wind speed table based on current wind limits Reference wind, runway course, as well as wind limits, can all be adjusted on the main screen by either dragging the wind arrow, course rose or wind limit lines. A settings button at the bottom presents a popup screen where both the units for wind speed (Kts or Mps) and the default values for wind limits can be specified. In addition to the general setting for wind speed units, the user can select the alternative units for only the current wind, wind components and maximum winds table by double tapping the wind display at the top of the main screen. When operating from a Kts country into Mps territory, this option allows to set the current wind and see the maximum allowed winds in Mps, based on limits that are still set in Kts. Or vice versa.... xWinds supports iOS darkmode.
Screenshots
Verdict
The clearest difference is price: Interpolator at Free against xWind's $0.99. Interpolator also leads on rating (4.9 vs 4.6). xWind's advantage is update cadence (fortnightly vs every 4 months) and ratings volume (554 vs 75). On ads, in-app purchases, monetization model 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
Interpolator is free to download; xWind costs $0.99 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 4.6. That said, the two scores are not equally well evidenced: xWind has 554 ratings behind it against 75, so its average is the more settled of the two. Written reviews complicate that: 67% of Interpolator's written reviews are positive against 75% of xWind's, so the app with the better star average is not the one people write more warmly about.
Interpolator ships an update every 4 months, xWind fortnightly. The most recent releases landed on October 23, 2026 and October 29, 2026 respectively.
| Parameter | Interpolator | xWind |
|---|---|---|
| Price | Free — better | $0.99 |
| Rating | 4.9 (75 ratings) — better | 4.6 (554 ratings) |
| Positive reviews | 66.7% of reviews | 75.0% of reviews — better |
| Number of ratings | 75 | 554 — better |
| Update frequency | Every 4 months | Fortnightly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 12.0 | 12.0 |
| Further details — not scored | ||
| Size | 18 MB | 13 MB |
| Age rating | +4 | 4+ |
| Developer | ron mooring | Jan Bloemendaal |
Customer experience
Interpolator
xWind
Bugs and requests
Interpolator
Not enough reviews yet to summarise bugs or requests.
xWind
Reported bugs
1 issue- Speed toggle doesn't work, always shows MPS
Requested features
3 requests- Incorporate gust factors
- 3 customizable buttons for quick limit settings
- Different colored concentric rings inside the red limit ring
In-app purchases
Interpolator
No in-app purchases
xWind
No in-app purchases









