# Ciudadanos Científicos vs Combinatorics Calculator

The clearest difference is in-app purchases: Ciudadanos Científicos at none against Combinatorics Calculator's 8. Ciudadanos Científicos also leads on iOS requirement (9.3 vs 15.0). Combinatorics Calculator's advantage is update cadence (every 3 weeks vs every 3 months). On price, ads and device support there is nothing between them.

Both are free to download. Combinatorics Calculator sells 8 one-off in-app purchases. Ciudadanos Científicos asks for nothing beyond the download.

Ciudadanos Científicos ships an update every 3 months, Combinatorics Calculator every 3 weeks. The most recent releases landed on October 5, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Ciudadanos Científicos | Combinatorics Calculator |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Size | 44 MB | 180 MB |
| Requires iOS | **9.3** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Area Metropolitana del Valle de Aburra](https://appshunter.io/developer/975007604) | [Glindemann, Sennoun, Langer GbR](https://appshunter.io/developer/1024972809) |

## What reviewers say

### Ciudadanos Científicos

[App page](https://appshunter.io/ios/app/ciudadanos-cientificos/id1103931436)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Combinatorics Calculator

[App page](https://appshunter.io/ios/app/combinatorics-calculator/id6472453602)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| +30 User Tokens | $0.29 | one-time |
| +1 Convenience Token / 6h, max. +2 | $0.59 | one-time |
| +2 Convenience Tokens / 6h, max. +4 | $0.99 | one-time |
| +150 User Tokens | $0.99 | one-time |
| +300 User Tokens | $1.49 | one-time |
| +4 Convenience Tokens / 6h, max. +8 | $1.59 | one-time |
| Lifetime Access | $1.99 | one-time |
| Remove Ads | $1.99 | one-time |


## Frequently asked questions

### Is Ciudadanos Científicos free?

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

### Is Combinatorics Calculator free?

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

### Do Ciudadanos Científicos or Combinatorics Calculator have ads?

Neither Ciudadanos Científicos nor Combinatorics Calculator shows ads.

### Which is updated more often, Ciudadanos Científicos or Combinatorics Calculator?

Ciudadanos Científicos ships an update every 3 months, and Combinatorics Calculator every 3 weeks. Most recently, Ciudadanos Científicos was updated on October 5, 2026 and Combinatorics Calculator 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.*