# Scientific Calculator * vs DB40X

The clearest difference is in-app purchases: DB40X at none against Scientific Calculator *'s 1. DB40X also leads on ads (none vs shown). Scientific Calculator *'s advantage is review sentiment (75% vs 67%) and iOS requirement (12.0 vs 14.0). On price, rating, ratings volume and update cadence there is nothing between them.

Both are free to download. Scientific Calculator * sells 1 one-off in-app purchase. DB40X asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.6 for Scientific Calculator * against 4.7 for DB40X. Both are backed by a comparable volume of ratings — 12 and 7 respectively. Written reviews are what separate them: 75% of Scientific Calculator *'s written reviews are positive against 67% of DB40X's.

Scientific Calculator * ships an update every 2 weeks, DB40X every 3 weeks. Both last shipped on October 24, 2026.

## The numbers

| Metric | Scientific Calculator * | DB40X |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (12 ratings)](https://appshunter.io/ios/app/scientific-calculator/id1537346972/reviews) | **[4.7 (7 ratings)](https://appshunter.io/ios/app/db40x/id6624315901/reviews)** |
| Number of ratings | **12** | 7 |
| Positive reviews | **75.0% of reviews** | 66.7% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 2 weeks** | Every 3 weeks |
| Monetization | Free with in-app purchases | **Free** |
| Size | 86 MB | 7 MB |
| Requires iOS | **12.0** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [TOWER OF HANOI SOFTWARE COMPANY LIMITED](https://appshunter.io/developer/1125320041) | [Christophe de Dinechin](https://appshunter.io/developer/1761608161) |

## What reviewers say

### Scientific Calculator *

[App page](https://appshunter.io/ios/app/scientific-calculator/id1537346972)

This app offers a comprehensive suite of calculation tools, including basic and advanced math functions, unit conversions, and financial calculators. It also features a history log for easy access to past calculations and allows for customization of themes.

**Highlights:** Basic and complex calculations, Unit and currency converter, Financial calculators (loan, discount), Calculation history log, Customizable themes, Fraction and trigonometric functions

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ad | $4.99 | one-time |


### DB40X

[App page](https://appshunter.io/ios/app/db40x/id6624315901)

A high-precision scientific calculator inspired by the HP48 series, offering arbitrary precision computations, complex numbers, vectors, matrices, and graphing. It supports RPN and algebraic operations, with over 1000 built-in functions and a hyperlinked help system.

**Highlights:** Arbitrary precision computations, RPN and algebraic operations, Complex numbers, vectors, and matrices, Graphing and plotting, Engineering units and conversions, Hyperlinked help system

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Scientific Calculator * free?

Scientific Calculator * is free to download, with in-app purchases available.

### Is DB40X free?

DB40X is free to download, with no in-app purchases.

### Which has better reviews, Scientific Calculator * or DB40X?

DB40X is rated higher. Scientific Calculator * averages 4.6 out of 5 from 12 ratings, while DB40X averages 4.7 from 7 ratings.

### Do Scientific Calculator * or DB40X have ads?

Scientific Calculator * shows ads; DB40X does not.

### Which is updated more often, Scientific Calculator * or DB40X?

Scientific Calculator * ships an update every 2 weeks, and DB40X every 3 weeks. Most recently, Scientific Calculator * was updated on October 24, 2026 and DB40X on October 24, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*