# NMR Calculator 2 vs ChemitAI

The clearest difference is in-app purchases: NMR Calculator 2 at none against ChemitAI's 1. ChemitAI's advantage is update cadence (every 2 days vs every 33 months) and iOS requirement (17.6 vs 26.0). On price, ads and device support there is nothing between them.

Both are free to download. ChemitAI sells 1 one-off in-app purchase. NMR Calculator 2 asks for nothing beyond the download.

NMR Calculator 2 ships an update every 33 months, ChemitAI every 2 days. The most recent releases landed on September 27, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | NMR Calculator 2 | ChemitAI |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 33 months | **Every 2 days** |
| Size | 2 MB | 53 MB |
| Requires iOS | 26.0 | **17.6** |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, Mac |
| Age rating | 4+ | 12+ |
| Developer | [Jae-Seung Lee](https://appshunter.io/developer/1146296876) | [Hanzell Pereira](https://appshunter.io/developer/1825650436) |

## What reviewers say

### NMR Calculator 2

[App page](https://appshunter.io/ios/app/nmr-calculator-2/id6466729022)

**Features:** macOS Compatibility

**In-app purchases:** none


### ChemitAI

[App page](https://appshunter.io/ios/app/chemitai/id6764376369)

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Chemitai Pro Lifetime | $3.99 | one-time |


## Frequently asked questions

### Is NMR Calculator 2 free?

NMR Calculator 2 is free to download, with no in-app purchases.

### Is ChemitAI free?

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

### Do NMR Calculator 2 or ChemitAI have ads?

Neither NMR Calculator 2 nor ChemitAI shows ads.

### Which is updated more often, NMR Calculator 2 or ChemitAI?

NMR Calculator 2 ships an update every 33 months, and ChemitAI every 2 days. Most recently, NMR Calculator 2 was updated on September 27, 2026 and ChemitAI on October 6, 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.*