# Ducala vs sci.calculator

The clearest difference is in-app purchases: Ducala at none against sci.calculator's 1. Ducala also leads on update cadence (fortnightly vs every 5 weeks) and iOS requirement (13.0 vs 15.0). On price, ads and device support there is nothing between them.

Both are free to download. sci.calculator sells 1 one-off in-app purchase. Ducala asks for nothing beyond the download.

Ducala ships an update fortnightly, sci.calculator every 5 weeks. The most recent releases landed on October 1, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | Ducala | sci.calculator |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 5 weeks |
| Size | 17 MB | 49 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Teerachart Jongkoldee](https://appshunter.io/developer/1568703635) | [Yukihiro Shioya](https://appshunter.io/developer/1565306192) |

## What reviewers say

### Ducala

[App page](https://appshunter.io/ios/app/ducala/id1568713313)

**Features:** macOS Compatibility

**In-app purchases:** none


### sci.calculator

[App page](https://appshunter.io/ios/app/scicalculator/id1620728508)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| remove Ads | $1.99 | one-time |


## Frequently asked questions

### Is Ducala free?

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

### Is sci.calculator free?

sci.calculator is free to download, with in-app purchases available.

### Do Ducala or sci.calculator have ads?

Neither Ducala nor sci.calculator shows ads.

### Which is updated more often, Ducala or sci.calculator?

Ducala ships an update fortnightly, and sci.calculator every 5 weeks. Most recently, Ducala was updated on October 1, 2026 and sci.calculator on September 30, 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.*