# Orange NMR

> Predicts 13C and 1H NMR spectra from drawn molecular structures. (iPhone/iPad app by Kirill Blinov.)

- Source: https://appshunter.io/ios/app/orange-nmr/id662859811 (this page in markdown: same URL + `.md`)
- Developer: [Kirill Blinov](https://appshunter.io/developer/630833420)
- Category: Education, Productivity
- Price: Free with in-app purchases
- Rating: 4.60/5 from 10 App Store ratings · 9 written reviews indexed
- Age rating: 4+
- Requires: iOS 5.1.1 · 17 MB
- Languages: American English
- Released: 2013-07-28
- Data updated: 2026-07-04
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/orange-nmr/id662859811/reviews.md

## What is Orange NMR?

App to predict 13C and 1H NMR spectra: draw a structure to see its spectrum. The accuracy of the algorithm is about 1.9 ppm for 13C and 0.21 ppm for 1H  (RMSD=3.4 and 0.31 ppm correspondingly).
The number of heavy atoms in structure to predict for free is restricted to 12 atoms. This restriction can be removed by purchasing additional licenses. 

- Instantly re-calculate spectrum while changing structure; 
- Predicted spectra stored in iCloud and synchronised among all iOS devices and Mac version (itunes.apple.com/app/orange-nmr/id680184249); 
- Email PDF report; 
- Zoom in spectrum; 
- Zoom in structure (important for iPhone users); 
- Option to display chemical shift values on structure; 
- Simple clean interface. 

The prediction algorithm is derived by: 
K. A. Blinov, E. D. Smurnyy, T. S. Churanova, M. E. Elyashberg, A. J. Williams, Chemom. Intell. Lab. Syst. 2009, 97, 91

## Key features

- Predict 13C and 1H NMR spectra
- Draw molecular structures
- Instant spectrum recalculation
- iCloud synchronization
- Email PDF reports
- Zoomable spectra and structures

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| 13C NMR Prediction | $99.99 | one-time |
| 1H NMR Prediction | $99.99 | one-time |
| 2 NMR Predictions | $0.99 | one-time |
| 5 NMR Predictions | $1.99 | one-time |
| 10 NMR Predictions | $2.99 | one-time |


## Recent user reviews (9 of 9)

All indexed reviews: https://appshunter.io/ios/app/orange-nmr/id662859811/reviews.md

### 5/5 — Impressive

*2022-04-23*

This is an outstanding teaching tool
Very impressive

### 5/5 — Phenomenal

*2018-12-07*

Hands down the most amazing app I have purchased in 2018. Here I am learning spectroscopy in OChem and I stumbled upon this mesmerizing app. Not only can I now go to sleep with ease, but now I can maybe not fail organic chemistry. Thank you so much to the developers for making a positive impact on my life. Best,
-a struggling college student

### 3/5 — About What you'd expect

*2016-02-11*

App is initially free, but the payment is disappointing. Would be a 5-star app if it let you use more complex molecules for free.
Still kind of impressive to have this on iOS though.

### 1/5 — Find another app

*2016-01-21*

This app is disappointing and really expensive to actually use.

### 2/5 — Used to be average, it's now almost useless

*2015-12-05, version 2.2*

Prior to a recent update it was occasionally helpful, now it is much less useful.

### 5/5 — Fantastic!

*2015-07-22, version 2.0*

Brilliant app to teach alevel nmr

### 5/5 — Dr

*2015-04-30*

Fantastic tool, very intuitive, does a good job with complex spin systems. Will recommend to my students!

### 5/5 — A level resource

*2014-10-08, version 1.4*

Really useful for teaching nmr. Recommend it for A level students to hone their nmr skills.

### 5/5 — Easy to use

*2013-10-03*

Easy to use. The molecules I put in gave the correct results.

## Frequently asked questions about Orange NMR

### What is Orange NMR used for?

Orange NMR is used to predict 13C and 1H NMR spectra by allowing users to draw molecular structures. It provides instant spectrum recalculation and can generate PDF reports.

### How accurate are the predictions in Orange NMR?

The algorithm in Orange NMR has an accuracy of about 1.9 ppm for 13C and 0.21 ppm for 1H, with RMSD values of 3.4 and 0.31 ppm, respectively.

### Can I use Orange NMR on multiple devices?

Yes, predicted spectra are stored in iCloud and synchronized across all your iOS devices and the Mac version, ensuring seamless use across platforms.

### What is the limitation for free users in Orange NMR?

The free version of Orange NMR restricts the number of heavy atoms in a structure to 12. This limitation can be removed by purchasing additional licenses.

### Does Orange NMR offer certifications?

Orange NMR does not offer certifications. It is a tool for predicting and analyzing NMR spectra, primarily for educational and research purposes.

### How often is Orange NMR updated?

The app was last updated on August 9, 2016, to version 2.4. While updates have not been frequent recently, the core functionality remains robust.

### What devices are supported by Orange NMR?

Orange NMR is supported on iPhone, iPad, and iPod devices, making it accessible to a wide range of Apple users.

### What is the age rating for Orange NMR?

Orange NMR has an age rating of 4+, making it suitable for a broad audience, including younger students learning about chemistry.

## Version history (last 5 releases)

### 2.4 — 2016-08-09

This app has been updated by Apple to display the Apple Watch app icon.

More accurate 3J H-H couplings prediction.

### 2.3 — 2016-05-08

Minor improvements: 
1. More accurate 4J HH couplings prediction.
2. Peaks table improved.

### 2.2 — 2015-11-21

iOS 9 multitasking supported.
Optional calculation of MF, MW, Monoisotopic Mass and Elemental Composition added. 
Ability to show terminal and all carbons on structure added.
Some minor bugs fixed.

### 2.1 — 2015-10-14

Table of peaks added.
Structure drawing enhanced:
1. Touch and drag from bond to draw ring.
2. Double click inside ring to make it aromatic.
3. P and I elements added.
4. Help added.

### 2.0 — 2015-04-20

1H NMR prediction (12 atoms restriction) added. 
Allow to draw structures with S, F, Cl and Br.
13C NMR prediction accuracy improved.

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## More apps by Kirill Blinov

- [Molecular Formula Generator](https://appshunter.io/ios/app/molecular-formula-generator/id646768652)
- [Molecule](https://appshunter.io/ios/app/molecule/id797331776)
- [All NMR](https://appshunter.io/ios/app/all-nmr/id808434461)
- [m/z](https://appshunter.io/ios/app/mz/id1117272212)
- [Find Molecule](https://appshunter.io/ios/app/find-molecule/id1140792040)

All apps by Kirill Blinov: https://appshunter.io/developer/630833420

## Related topics

[nmr solvent peaks](https://appshunter.io/ios/topics/nmr-solvent-peaks) · [nmrx](https://appshunter.io/ios/topics/nmrx)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-04.*