# Roughness vs Noesis

The clearest difference is in-app purchases: Roughness at none against Noesis's 2. Noesis's advantage is update cadence (every 10 days vs every 14 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Noesis sells 2 in-app purchases, starting at $12.99 per month. Roughness asks for nothing beyond the download.

Roughness ships an update every 14 months, Noesis every 10 days. The most recent releases landed on October 14, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Roughness | Noesis |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 14 months | **Every 10 days** |
| Size | 26 MB | 111 MB |
| Requires iOS | **15.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [Carl Zeiss AG](https://appshunter.io/developer/488066215) | [Abhishek Chauhan](https://appshunter.io/developer/1886624177) |

## What reviewers say

### Roughness

[App page](https://appshunter.io/ios/app/roughness/id1356085703)

**In-app purchases:** none


### Noesis

[App page](https://appshunter.io/ios/app/noesis-math-physics-finance/id6804661027)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Noesis Monthly | $12.99 | per month |
| Noesis Yearly | $34.99 | per year |


## Frequently asked questions

### Is Roughness free?

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

### Is Noesis free?

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

### Do Roughness or Noesis have ads?

Neither Roughness nor Noesis shows ads.

### Which is updated more often, Roughness or Noesis?

Roughness ships an update every 14 months, and Noesis every 10 days. Most recently, Roughness was updated on October 14, 2026 and Noesis on October 7, 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.*