# NMR Spectroscopy Tutor vs K

The clearest difference is price: NMR Spectroscopy Tutor at Free against K's $0.99. K's advantage is in-app purchases (none vs 1) and update cadence (every 2 weeks vs every 5 months). On ads, device support and iOS requirement there is nothing between them.

NMR Spectroscopy Tutor is free to download; K costs $0.99 up front. NMR Spectroscopy Tutor sells 1 one-off in-app purchase. K asks for nothing beyond the download.

NMR Spectroscopy Tutor ships an update every 5 months, K every 2 weeks. The most recent releases landed on November 4, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | NMR Spectroscopy Tutor | K |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 2 weeks** |
| Monetization | — | Paid |
| Size | 9 MB | 4 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [David Soulsby](https://appshunter.io/developer/1776367161) | [Masaki Kobayashi](https://appshunter.io/developer/1882180437) |

## What reviewers say

### NMR Spectroscopy Tutor

[App page](https://appshunter.io/ios/app/nmr-spectroscopy-tutor/id6770698197)

**Features:** Family Sharing, iPhone Duo support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock All Problems | $4.99 | one-time |


### K

[App page](https://appshunter.io/ios/app/k-mol-molecular-model/id6772762907)

Create and visualize 2D and 3D molecular models with intuitive drawing tools and AR capabilities. This app serves as a practical and cost-effective alternative to physical model kits for students.

**Highlights:** 2D structural formula drawing, 3D molecular model visualization, Augmented Reality (AR) viewing, Save and reopen models, Pre-built templates, Screenshot capture

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

**In-app purchases:** none


## Frequently asked questions

### Is NMR Spectroscopy Tutor free?

NMR Spectroscopy Tutor is free to download, with in-app purchases available.

### Is K free?

K costs $0.99, with no in-app purchases.

### Do NMR Spectroscopy Tutor or K have ads?

Neither NMR Spectroscopy Tutor nor K shows ads.

### Which is updated more often, NMR Spectroscopy Tutor or K?

NMR Spectroscopy Tutor ships an update every 5 months, and K every 2 weeks. Most recently, NMR Spectroscopy Tutor was updated on November 4, 2026 and K on October 31, 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.*