# m/z

> Chemical structure search by exact mass from a large database. (iPhone/iPad app by Kirill Blinov.)

- Source: https://appshunter.io/ios/app/mz/id1117272212 (this page in markdown: same URL + `.md`)
- Developer: [Kirill Blinov](https://appshunter.io/developer/630833420)
- Category: Productivity, Education
- Price: Free
- Rating: 3.60/5 from 5 App Store ratings · 2 written reviews indexed
- Age rating: 4+
- Requires: iOS 6.0 · 3.6 GB
- Languages: American English
- Released: 2016-06-28
- Data updated: 2026-06-01
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/mz/id1117272212/reviews.md

## What is m/z?

Find chemical structure by exact mass (m/z). 
Instant search in a database of known structures with exact mass less than 340 Da (about 35 million) created from PubChem compounds database.

## Key features

- Find chemical structures by exact mass
- Search database of known structures
- Database includes over 35 million compounds
- Supports masses under 340 Da
- Utilizes PubChem compounds database

## Recent user reviews (2 of 2)

All indexed reviews: https://appshunter.io/ios/app/mz/id1117272212/reviews.md

### 4/5 — Great idea but with major limitation

*2019-11-03*

Great idea and simple, clean implementation. However, hits are only retrieved for whole numbers on my iPhone SE. This makes the app unusable in practice. I hope this issue will get fixed quickly.

### 5/5 — Great use of the EPA CompTox Dashboard Chemistry Data

*2016-09-14*

I am the project lead for the Chemistry Dashboard at the EPA and I am glad to see that the data that we released to the community as open data has been used in this way to produce this app. It will be very useful for mass spectrometrists just doing basic lookup of potential chemical structures in environmental media specifically. I look forward to seeing future enhancements!

## Frequently asked questions about m/z

### What is m/z used for?

m/z is used to find chemical structures by their exact mass. It allows users to search a database of known compounds with masses under 340 Da.

### How large is the database in m/z?

The database in m/z contains approximately 35 million chemical structures created from the PubChem compounds database.

### What is the age rating for m/z?

m/z has an age rating of 4+, making it suitable for a wide range of users.

### What devices does m/z support?

m/z is available on iPhone, iPad, and iPod devices.

### Is m/z free to use?

Yes, m/z is available for free. There are no in-app purchases or subscriptions required.

### Does m/z have ads?

No, m/z does not contain advertisements. It is a completely ad-free application.

### When was m/z last updated?

The latest version of m/z was released on October 25, 2016.

### What is the user rating for m/z?

m/z has a user rating of 3.6 stars based on 5 ratings.

## Version history (last 4 releases)

### 2.0 — 2016-10-25

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

Database size increased to 35 million and 340 Da.
Note that the app size becomes about 4 GB.

### 1.2 — 2016-08-15

Added ability to share search result as a pdf.

### 1.1 — 2016-08-03

Database size increased to 2 million structures (up to 190 Da).

### 1.0 — 2016-06-28

No release notes.

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## More apps by Kirill Blinov

- [Molecular Formula Generator](https://appshunter.io/ios/app/molecular-formula-generator/id646768652)
- [Orange NMR](https://appshunter.io/ios/app/orange-nmr/id662859811)
- [Molecule](https://appshunter.io/ios/app/molecule/id797331776)
- [All NMR](https://appshunter.io/ios/app/all-nmr/id808434461)
- [Find Molecule](https://appshunter.io/ios/app/find-molecule/id1140792040)

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

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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 2026-06-01.*