# Constructive Calculator — Calculator that doesn't round

> Arbitrary-precision calculator that avoids rounding errors and provides exact results. (iPhone/iPad app by Dmitriy Mayorov.)

- Source: https://appshunter.io/ios/app/constructive-calculator/id6778157421 (this page in markdown: same URL + `.md`)
- Developer: [Dmitriy Mayorov](https://appshunter.io/developer/6778157423)
- Category: Utilities, Education
- Price: Free
- Rating: 5.00/5 from 1 App Store ratings
- Age rating: 4+
- Requires: iOS 16.0 · 1 MB
- Languages: English
- Released: 2026-06-24
- Data updated: 2026-07-16
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/constructive-calculator/id6778157421/reviews.md

## What is Constructive Calculator?

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.

## Key features

- Arbitrary-precision calculations
- Unlimited digit display
- Scientific keypad
- Exact results for large numbers
- Running tape of calculations
- Locale-aware digit grouping


## Frequently asked questions about Constructive Calculator

### Does Constructive Calculator have ads?

No, Constructive Calculator is ad-free, allowing for an uninterrupted user experience.

### What devices does Constructive Calculator support?

Constructive Calculator is currently supported on iPhone.

### How often is Constructive Calculator updated?

The latest version, 0.3, was released on July 2, 2026. Updates are provided by the developer, Dmitriy Mayorov.

### What is the age rating for Constructive Calculator?

Constructive Calculator has an age rating of 4+, making it suitable for a wide range of users.

### How does Constructive Calculator handle large numbers?

Constructive Calculator displays large numbers in full, without using scientific notation, ensuring all digits are visible and exact.

### Can I copy results from Constructive Calculator?

Yes, you can copy calculation results at whatever precision you need, ensuring you can use exact values elsewhere.

### What makes Constructive Calculator different from other calculators?

Unlike ordinary calculators that round results, Constructive Calculator uses constructive real numbers for arbitrary precision, preventing rounding errors.

### What scientific functions are available in Constructive Calculator?

It includes trigonometry (degrees/radians), exponentials, logarithms, powers, roots, factorials, percentages, and constants like π and e, all computed to arbitrary precision.

## Version history (last 2 releases)

### 0.3 — 2026-07-02

Now on iPad. Tap anywhere in an expression to move the cursor and edit in place, fixing a typo without starting over. The parenthesis key now shows whether it will open or close next.

### 0.2 — 2026-06-24

No release notes.

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-16.*