Octal vs Polynomial Regression
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Octal
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Octal calculator allow you to multiply, addition, subtraction and division.
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 in-app purchases: Polynomial Regression at none against Octal's 1. Polynomial Regression also leads on ads (none vs shown) and update cadence (every 3 weeks vs every 5 months). Octal's advantage is iOS requirement (13.0 vs 15.0). On price 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. Octal sells 1 one-off in-app purchase. Polynomial Regression asks for nothing beyond the download.
Octal ships an update every 5 months, Polynomial Regression every 3 weeks. The most recent releases landed on October 27, 2026 and October 25, 2026 respectively.
| Parameter | Octal | Polynomial Regression |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 5 months | Every 3 weeks — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 139 MB | 4 MB |
| Age rating | 17+ | 4+ |
| Developer | Amrit Duwal | Yuri Morozov |
In-app purchases
Octal
- No Ads$0.99
Polynomial Regression
No in-app purchases
Questions
Is Octal free?
Is Polynomial Regression free?
Do Octal or Polynomial Regression have ads?
Which is updated more often, Octal or Polynomial Regression?
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