# Chemist Calc vs Noesis

The clearest difference is update cadence: Noesis at every 10 days against Chemist Calc's every 9 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Chemist Calc sells 1 one-off in-app purchase and Noesis sells 2 in-app purchases, starting at $12.99 per month. Whichever you choose, the download price is not the number that matters.

Chemist Calc ships an update every 9 months, Noesis every 10 days. The most recent releases landed on October 16, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Chemist Calc | Noesis |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/chemist-calc/id1052603017/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 10 days** |
| Monetization | Free | — |
| Size | 11 MB | 111 MB |
| Requires iOS | **16.0** | 16.4 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [ilan TETRUASHVILI](https://appshunter.io/developer/940821251) | [Abhishek Chauhan](https://appshunter.io/developer/1886624177) |

## What reviewers say

### Chemist Calc

[App page](https://appshunter.io/ios/app/chemist-calc/id1052603017)

This app serves as a smart chemistry calculator for converting between moles and grams. It also provides a comprehensive periodic table with element specifications and unit conversion tools.

**Highlights:** Mole to gram conversion, Gram to mole conversion, Periodic table with element specifications, Unit conversion, Learn chemistry signs

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ad's | $0.99 | one-time |


### 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 Chemist Calc free?

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

### Is Noesis free?

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

### Do Chemist Calc or Noesis have ads?

Neither Chemist Calc nor Noesis shows ads.

### Which is updated more often, Chemist Calc or Noesis?

Chemist Calc ships an update every 9 months, and Noesis every 10 days. Most recently, Chemist Calc was updated on October 16, 2026 and Noesis on October 25, 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.*