Crystal Flight vs Polynomial Regression
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Crystal Flight
Experience free flight within diverse crystal environments. Navigate your journey by simply tilting your iPhone or iPad to control direction.
- Free flight simulation
- Crystal environments
- Tilt-to-navigate controls
- iPhone and iPad support
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Fly freely in a variety of crystals. To navigate, simply tilt your iPhone or iPad in the direction you want to go.
Polynomial Regression
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Polynomial Regression is your calculator and, more importantly, learning tool. You will be able to: * Construct polynomials of up to 20 degrees from either real or complex roots. * Interpolate polynomials from points by Lagrange, Newton or Vandermonde methods and Quadratic or Cubic splines. * Perform Least Squares approximation by orthogonal projection, with or without QR factorization, or partial derivatives. * Learn about each of the algorithms with derivations, proofs, step by step demonstrations, and visual tools. * Have an option to enter data by either typing or tapping on XY plane, and save data sets between program runs.
Screenshots
Verdict
The clearest difference is update cadence: Polynomial Regression at every 3 weeks against Crystal Flight's every 5 months. Polynomial Regression also leads on iOS requirement (15.0 vs 17.0). On price, 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Crystal Flight ships an update every 5 months, Polynomial Regression every 3 weeks. The most recent releases landed on July 5, 2026 and September 14, 2026 respectively.
| Parameter | Crystal Flight | Polynomial Regression |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 5 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod |
| Requires iOS | 17.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 4 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | Jeff Weeks | Yuri Morozov |
In-app purchases
Crystal Flight
No in-app purchases
Polynomial Regression
No in-app purchases
Questions
Is Crystal Flight free?
Is Polynomial Regression free?
Do Crystal Flight or Polynomial Regression have ads?
Which is updated more often, Crystal Flight or Polynomial Regression?
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