KDCA vs Constructive Calculator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
KDCA
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A calculator is a valuable assistant that helps you solve math problems without much difficulty. Calculator app allows you to calculate basic or scientific math operations quickly and intuitively. Math sums just got easier. Trust and become a math master!
Constructive Calculator
This calculator performs calculations with arbitrary precision, avoiding rounding errors common in standard calculators. It provides an extensive scientific keypad and can display an unlimited number of digits for exact results.
- Arbitrary-precision calculations
- Unlimited digit display
- Scientific keypad
- Exact results for large numbers
- Running tape of calculations
- Locale-aware digit grouping
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Ordinary calculators round. Constructive Calculator doesn't. It computes with constructive real numbers, an arbitrary-precision engine that keeps every result exact and hands you as many correct digits as you ask for. The rounding errors that quietly accumulate in ordinary calculators simply never happen. AS MANY DIGITS AS YOU WANT A pocket calculator stops at about 15 digits and rounds off the rest. Constructive Calculator keeps every result exact, so the digits a normal calculator throws away are still there. Swipe √2, π, or any answer to pull in tens, hundreds, or thousands more, computed on demand. SCIENTIFIC KEYPAD Trigonometry in degrees or radians and their inverses, exponentials and logarithms, powers and roots, factorials, percentages, the constants π and e, and the standard normal distribution, its CDF Φ and quantile Φ⁻¹, computed to the same arbitrary precision as everything else. BIG INTEGERS, IN FULL 52! (the number of ways to shuffle a deck) prints in full, all 68 of its digits, with no scientific-notation hand-waving. BUILT FOR CLARITY A running tape of recent calculations, locale-aware digit grouping, and copy at whatever precision you need. Constructive Calculator is an independent port of Hans Boehm's constructive-reals calculator, rebuilt natively for iPhone and iPad.
Screenshots
Verdict
KDCA and Constructive Calculator are too close to call on the numbers: across 3 compared parameters — price, in-app purchases and iOS requirement among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
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.
| Parameter | KDCA | Constructive Calculator |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | — | Every 8 days |
| Ads | — | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | — | iPhone — better |
| Requires iOS | 15.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 57 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Korea NFT Certificate Authority | Dmitriy Mayorov |
In-app purchases
KDCA
No in-app purchases
Constructive Calculator
No in-app purchases
Questions
Is KDCA free?
Is Constructive Calculator free?
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