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Nomencla

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Learn the names of 914 organic compounds, from methane to imatinib: structures, common names, and IUPAC names in English, German, French, Japanese, and Korean, in three levels from high school to PhD. 150 compounds free, full version as a one-time purchase.

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Description

Indole or indazole? Pyrimidine or pyrazine? Nomencla teaches you the names of organic compounds: common names and systematic IUPAC names, in English, German, French, Japanese, and Korean. 914 compounds in three levels, from high school to PhD: Basics with the functional groups, everyday compounds, and the 20 amino acids; Bachelor with heterocycles, sugars and nucleotides, metabolism, and natural products; Master with fused heterocycles, reagents, protecting groups, and drugs. Every wrong answer is a compound people actually mix up, so you learn the differences instead of guessing from a pattern. Practice structure to name and name to structure, common versus systematic names, typing names yourself, amino acid codes, lab abbreviations from THF to HATU, spotting the ring system in drugs such as omeprazole, heterocycle numbering, and translating between English and your other language of names. For JEE Main, NEET, and JEE Advanced, the organic chemistry of the syllabus comes as ready-made exams. Learn by level, by category and collection, or with your own sets: paste the list of names from your lecture notes, and Nomencla turns it into a set. Spaced repetition brings back what is due, and the exam mode tests you without help. The lexicon shows every compound with its structure, its common and systematic names, molecular formula, molar mass, and the compounds it gets confused with. The first 150 compounds you practise are free, then 5 a day; the full version unlocks everything as a one-time purchase. No subscription, no ads, no account, no tracking.

Questions about Nomencla

No. Nomencla is free to download: the first 150 compounds you practise are free, after that 5 a day, reviews included. The full version unlocks all compounds without a limit as a one-time in-app purchase. There is no subscription and no advertising, and new content arrives as a free update.

For anyone who has to know organic compounds by name, from high school to a PhD. Level 1 (Basics) covers high school, lab training, and the first semester. Level 2 (Bachelor) adds what chemistry, biochemistry, pharmacy, and medicine degrees need, including the MCAT. Level 3 (Master) adds what master's students, pharmacy exams, and PhD work require. For JEE Main, NEET, and JEE Advanced, the exam tab has the organic chemistry of the syllabus as ready-made exams. When you start, you pick your focus, and Nomencla presets the level and structure types. You can change everything later.

914 compounds: hydrocarbons, halogen, oxygen, and nitrogen compounds, sulfur, phosphorus, silicon, boron, and organometallics, 185 heterocycles from aziridine to fused and bridged ring systems, 47 amino acids and small peptides, 164 biomolecules and natural products (sugars, nucleotides, metabolism, lipids, terpenes, alkaloids, vitamins, hormones), dyes and indicators, 47 drugs, and 80 substituents, protecting groups, and reagents.

The name you hear in class and in the lab comes first, such as toluene or acetone. Where it differs, the systematic IUPAC name is shown alongside (methylbenzene, propan-2-one). When you type a name, case, spaces, and hyphens do not count, but locants do, and common older forms such as 2-propanol are accepted too. Drugs are named by their INN, never by brand names.

You set the language of the names independently of the app language: English, German, French, Japanese, or Korean, with English alongside if you like. With two languages, Nomencla also asks you to translate. English names follow international usage or, if you prefer, US usage, such as acetaminophen and epinephrine instead of paracetamol and adrenaline. Japanese names follow the Chemical Society of Japan, Korean names the Korean Chemical Society.

Yes. Create your own sets: tick compounds in the lexicon, save a category as a set, or paste the list of names from your lecture notes. Nomencla recognizes names in all five languages, synonyms, and abbreviations, and suggests a match for typos. Compounds you do not need can be ignored, and they no longer come up anywhere.

Every question and every lexicon entry has a "Report" button that opens an email to us with the compound already filled in. Names and structures are cross-checked against PubChem and Wikidata, and corrections come with the next update. Where textbooks differ, for example in how amino acid side chains are classified, the app follows the most common convention. If your lecture teaches it differently, your lecture wins.

Yes, completely. All compounds and structures are part of the app, and your progress stays on your device. Nomencla needs no account and no internet connection.

Nomencla runs on iPhone and iPad with iOS 15 or later. The app is available in English, German, French, Japanese, and Korean and follows your device language; you can also switch it in the settings.

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Support & Legal

App Support

Do you have questions, problems, or feedback regarding the app? Write to us at our support email.

contact.schulzpod@gmail.com

Terms of Service

Terms of Use & Legal Notices

Apple App Store

If you acquired this App through the Apple App Store, unless regulated otherwise herein, the acquisition and use of the App are governed by Apple's Standard Licensed Application End User License Agreement (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Consumer Dispute Resolution / Universal Arbitration Board

We are not willing or obligated to participate in dispute resolution proceedings before a consumer arbitration board.

Disclaimer

Disclaimer of Liability

Despite careful development and review, we do not guarantee the accuracy, completeness, or timeliness of the presented content within the app (e.g., compound names, structures, numbering, or molecular data).

Nomencla shows names and structures only. It contains no instructions for the synthesis, handling, or use of any substance and is not a substitute for textbooks, lecture materials, or safety data sheets.

The app is intended exclusively for learning and educational purposes. The use of the app is at your own risk. We assume no liability for damages arising from the use of the app.

Privacy Policy

Privacy Policy for Nomencla

Last updated: November 11, 2026

In short

Your learning progress and sets stay on your device. Something leaves it in only two places: RevenueCat checks your purchase of the full version with a random ID, and if you turn on the optional iCloud sync, your progress is stored in your private iCloud. No account, no advertising, no tracking.

Data on Your Device

The app does not need an account, and we do not run any servers for it. The app contains no advertising, no tracking, and no analytics.

Your learning progress, your sets, ignored compounds, and your settings are stored on your device. If you use iCloud Backup or back up your device to a computer, iOS includes this data in the backup, as it does for any app; we have no access to it.

iCloud Sync

With the full version, you can turn on iCloud sync in the settings (it is off by default). The app then also stores your learning progress, your sets, ignored compounds, and your daily streak in your private iCloud key-value storage, so they match on all devices signed in with the same Apple Account. Apple provides this storage; we have no access to it, and nothing is sent to us. Your settings stay on each device. If you turn sync off, the app stops syncing; the copy in iCloud remains part of your iCloud data with Apple.

Notifications

If you turn on the daily reminder, the app schedules a local notification on your device. No data is sent to us or to a push service for this. You can turn the reminder off at any time in the app or in the iOS settings.

External Links

Each compound's detail page links to its public page on PubChem, a database of the U.S. National Library of Medicine. The settings link to our other apps in the App Store. These links open outside the app, and the privacy policy of the respective provider applies there.

Contact by E-Mail

If you report an error or send feedback from the app, your mail app opens with a prepared message containing the app version, the platform, and, for error reports, the name of the compound. We only use your message and e-mail address to answer your request.

App Store

You get the app through the Apple App Store. Apple is responsible for download, payment, and updates; we have no access to that data. Apple's privacy policy applies: https://www.apple.com/legal/privacy/

If you have turned on "Share with App Developers" in the iOS settings, Apple provides us with anonymous crash reports and usage statistics. They do not identify you.

In-App Purchases & RevenueCat

The payment is handled by Apple. To unlock purchases on all your devices and restore them, the app uses the service RevenueCat. RevenueCat receives a random App User ID that is not linked to your name or Apple ID, information about your purchases (e.g., product, date, and store transaction), and technical device information (e.g., app version, operating system version, and store country). As with any internet connection, your IP address is transmitted for technical reasons.

Content you create in the app is never transmitted. The data is not used for advertising or tracking.

RevenueCat – Provider & Transfer to the USA

The provider is RevenueCat, Inc., 1032 E Brandon Blvd #3003, Brandon, FL 33511, USA. RevenueCat processes the data on our behalf (Art. 28 GDPR). Because the data reaches the USA, the transfer is safeguarded by the European Commission's Standard Contractual Clauses (Art. 46(2)(c) GDPR). RevenueCat's privacy policy: https://www.revenuecat.com/privacy

Legal Basis

Whatever happens only on your device or in your private iCloud does not reach us; we do not process that data.

Checking and restoring your purchases via RevenueCat is based on Art. 6(1)(b) GDPR (performance of the purchase contract). That the app also checks the unlock status when you have not bought anything, and that your IP address is transmitted for technical reasons, is based on Art. 6(1)(f) GDPR; our legitimate interest is a reliable unlock on all your devices.

If you e-mail us, we process your address and message to answer you (Art. 6(1)(b) GDPR for questions about a purchase, otherwise Art. 6(1)(f) GDPR).

Storage Period

What the app stores on your device stays there until you delete it in the app or remove the app. Data in your iCloud can be deleted in your device's iCloud settings.

RevenueCat keeps purchase data as long as it is needed to manage your purchases; on request, we have it deleted unless statutory retention obligations apply.

We delete e-mails to us once your request has been resolved, unless statutory retention obligations apply.

Your Rights

You have the right to access (Art. 15 GDPR), rectification (Art. 16), erasure (Art. 17), restriction of processing (Art. 18), data portability (Art. 20), and to object to processing based on legitimate interests (Art. 21). You can withdraw consent at any time with effect for the future (Art. 7(3)).

Since we do not keep accounts and the app does not identify you, we often cannot attribute data to a person (Art. 11 GDPR). Write to us anyway; we are happy to help.

Right to Lodge a Complaint

You can lodge a complaint with a data protection supervisory authority (Art. 77 GDPR), for example the one responsible for us: the data protection authority of Lower Saxony (LfD Niedersachsen), Prinzenstraße 5, 30159 Hannover, Germany, https://www.lfd.niedersachsen.de

Controller & Contact

Nikita Aurelian Schulz (PODSchu). The full address is in the legal notice (Impressum) on this page.

For questions about data protection: contact.schulzpod@gmail.com

Legal Notice

Nikita Aurelian Schulz - PODSchu — NomenclaAll rights reserved.