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Best Z3E Apps

198+ iOS apps curated and reviewed

4.4 avg rating
19 free apps
Updated May 2026

From beginner-friendly picks to power-user tools, our z3e list covers 198+ iPhone apps updated through May 2026. Compare ratings, prices, and screenshots in one place.

Compare top Z3E Apps (May 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1MoleculesMoleculesFree3.6★ (166)NoNoAug 2026
2Periodic Table: Chemistry 2026Periodic Table: Chemistry 2026Free4.8★ (5.3K)NoYesAug 2026
3Obsidian - Connected NotesObsidian - Connected NotesFree4.5★ (2.7K)NoNoAug 2026
4Davis Drug Guide For NursesDavis Drug Guide For NursesFree4.8★ (8.7K)NoYesAug 2026
5EMD PTEEMD PTEFree4.7★ (121)NoNoJul 2026
6Highlights: PDF Reader & NotesHighlights: PDF Reader & NotesFree4.5★ (1.6K)NoYesAug 2026
7Papers by ReadCubePapers by ReadCubeFree3.7★ (551)NoNoJul 2026
8ZoteroZoteroFree4.6★ (420)NoNoAug 2026

Top Picks for Z3E

Molecules#1

Molecules by Sunset Lake Software

Editor's Choice
📚 Education
3.6😐(166 ratings)
Free
Molecules screenshot 1
Molecules screenshot 2
Molecules screenshot 3
Molecules screenshot 4
Molecules screenshot 5

Explore and interact with 3D molecular models on your device. Rotate, zoom, and pan structures using intuitive touch gestures. Visualize molecules in different modes and load custom structures from various sources.

What We Love

  • 🚀 Fast and responsive
  • 👍 Useful for visualizing molecules
  • 👍 Great for teaching chemistry
  • 👍 Excellent for biochemistry students

Room to Improve

  • 🐛 Crashes when downloading new molecules
  • 🐛 Compatibility issues with newer iOS devices
  • 🐛 Limited functionality, missing key features
Periodic Table: Chemistry 2026#2

Periodic Table: Chemistry 2026 by Nikita Chernykh

Chemistry in your phone!
Strong Contender
📚 Education
4.8😊(5.3K ratings)
FreeIn-App Purchases
Periodic Table: Chemistry 2026 screenshot 1
Periodic Table: Chemistry 2026 screenshot 2
Periodic Table: Chemistry 2026 screenshot 3
Periodic Table: Chemistry 2026 screenshot 4
Periodic Table: Chemistry 2026 screenshot 5
Periodic Table: Chemistry 2026 screenshot 6

Explore the universe's language with this interactive chemistry app. It offers a clear, visual, and fact-based approach to understanding elements, isotopes, and chemical reactions. Ideal for students, educators, and curious minds.

What We Love

  • 🚀 Great app for chemistry learning
  • 👍 Useful information and features
  • 💡 Includes theoretical elements
  • 🚀 Efficient and easy to use

Room to Improve

  • 🐛 Some inaccuracies in element data
  • 🔒 Paid version required for full functionality
  • 🔒 Certain features locked behind paywall
Obsidian - Connected Notes#3

Obsidian - Connected Notes by Dynalist Inc.

Your second brain on the go
Worth Considering
📊 Productivity
4.5😊(2.7K ratings)
Free
Obsidian - Connected Notes screenshot 1
Obsidian - Connected Notes screenshot 2
Obsidian - Connected Notes screenshot 3
Obsidian - Connected Notes screenshot 4
Obsidian - Connected Notes screenshot 5
Obsidian - Connected Notes screenshot 6

Organize your thoughts and ideas with a powerful knowledge base that utilizes local Markdown files. This app acts as your personal second brain, accessible on your mobile device for seamless note-taking and idea connection.

What We Love

  • 🚀 Powerful features
  • 👍 Customizable and flexible
  • 🔒 Secure and private
  • 💡 Innovative note-taking approach

Room to Improve

  • 🐛 Sync issues and unreliable iCloud integration
  • 🔋 Slow startup and performance issues on mobile
  • 👎 Steep learning curve for new users

More Z3E apps to explore

4
Davis Drug Guide For Nurses
Davis Drug Guide For Nurses
Davis Drug Guide For Nurses
Medication Safety in Nursing
Free

This comprehensive drug guide provides nurses with essential medical information for safe medication administration. It features thousands of drug monographs, interaction details, and safety alerts, all organized for quick access and enhanced by personalized notes and search functionality.

Thousands of drug monographsDrug-drug and drug-food interactionsSafety alerts and cautions
🏥 Medical
(8.7K)
subscription
5
EMD PTE
EMD PTE
EMD PTE
by Merck KGaA (Darmstadt, Germany)
Free

This comprehensive mobile reference work provides detailed information on all chemical elements. It features a molar mass calculator, interactive visualizations, and offline access, making it an indispensable tool for students, educators, and chemistry enthusiasts.

Detailed element informationVisualized element propertiesMolar mass calculator
📚 Education
(121)
free
6
Highlights: PDF Reader & Notes
Highlights: PDF Reader & Notes
Highlights: PDF Reader & Notes
Edit Research Documents/Books
Free

This app is a fast and lightweight PDF reader designed for research. It allows users to read, highlight, and annotate documents, and then extract this information into organized notes. Advanced features include table data extraction, text recognition, and smart copying of annotations into various formats.

Read and browse PDF documentsHighlight, underline, and strikethrough textAdd comments and sticky notes
📊 Productivity
(1.6K)
freemium
7
Papers by ReadCube
Papers by ReadCube
Papers by ReadCube
by Digital Science & Research Solutions Inc.
Free

Manage, read, and discover research literature on your mobile devices. Annotate PDFs, organize your library with custom lists and tags, and receive personalized recommendations for new papers. Syncs seamlessly with desktop and web applications.

Read and manage research papersAnnotate PDFs with notes and highlightsOrganize library with custom lists and tags
📊 Productivity
(551)
free
8
Zotero
Zotero
Zotero
Your research assistant
Free

This research tool helps you collect, organize, annotate, cite, and share your academic and professional work. Save articles, books, and webpages, add notes and highlights, and generate bibliographies in thousands of styles. Collaborate with others and sync your library across devices.

Collect research from various sourcesOrganize with collections and tagsAnnotate PDFs and webpages
📊 Productivity
(420)
free
9
XLSX Sheets: Edit Spreadsheet
XLSX Sheets: Edit Spreadsheet
XLSX Sheets: Edit Spreadsheet
Create, Share XLS Office Files
Free

Create, edit, and manage Excel-compatible spreadsheets on your mobile device. Offers powerful editing tools, formula assistance, data visualization, and collaboration features. Work offline and import/export data in various formats.

Edit, create, and manage XLS sheetsExcel-compatible formula builderData visualization tools
📊 Productivity
(2.9K)
free with in-app purchases
10
PepPedia
PepPedia
PepPedia
Peptide Wiki & Tracker
Free

An educational reference for peptide research, offering a comprehensive library of peptide profiles, personal tracking tools for notes and inventory, and helpful math calculators. Securely sync your data across devices to stay organized and informed.

Peptide research libraryPersonal notes and logsInventory and expiration tracking
💪 Health & Fitness
(34)
free with in-app purchases
11
Chemistry. Periodic table. AI
Chemistry. Periodic table. AI
Chemistry. Periodic table. AI
Chemical reactions. Elements
Free

Explore an interactive periodic table with 3D models and AR features. This app offers an AI-powered tutor for simplified explanations, a reaction solver, and a molar mass calculator. It's a comprehensive reference for students and professionals to learn chemistry effectively.

Interactive Periodic Table with 3D modelsAI-powered chemistry tutor (ChemAI)Chemical reaction solver
📚 Education
(2.7K)
free with in-app purchases
12
WebMO Molecule Editor
WebMO Molecule Editor
WebMO Molecule Editor
Draw, Calculate, Visualize
Free

Create and explore 3D molecular structures, visualize chemical properties, and access extensive chemical databases. This tool is ideal for students and educators needing on-the-go access to molecular information and computational chemistry resources.

3D molecular editorStructure optimizationOrbital and symmetry visualization
📚 Education
(40)
free with in-app purchases
13
Genomapp: Raw DNA Analysis
Genomapp: Raw DNA Analysis
Genomapp: Raw DNA Analysis
Interpret Genetic Data Files
Free

Analyze your raw DNA test data from various providers to uncover insights into your genetic health. This app cross-references your genetic information with scientific studies, presenting findings in a visual and easy-to-understand format. Explore predispositions to complex diseases, inherited conditions, drug responses, traits, and more.

Raw DNA data analysisScientific study cross-referencingGenetic health reports
💪 Health & Fitness
(817)
free with in-app purchases
14
Peptide Tracker & Calculator
Peptide Tracker & Calculator
Peptide Tracker & Calculator
Your Private Peptide Log
Free

This app helps you meticulously track and calculate peptide dosages, inventory, and injection sites. It provides smart alerts for low stock and detailed logs of your usage history for research, fitness, or therapeutic protocols. Your data is stored securely and privately on your device.

Comprehensive peptide inventory managementPrecise dosing log and calculation supportIntelligent injection site rotation tracking
💪 Health & Fitness
(494)
free with in-app purchases
15
Peptide Calculator App
Peptide Calculator App
Peptide Calculator App
Pepcalc Compound & Dosage
Free

This app serves as a comprehensive peptide dosage calculator for researchers and enthusiasts. It offers features like saving calculations, tracking peptide usage, and a reconstitution guide. Users can also explore mixing ratios and export results to PDF.

Syringe size optionsSave and edit calculationsPeptide tracking and history
🏥 Medical
(538)
free with in-app purchases
16
mobilePDR
mobilePDR
mobilePDR
Prescribers' Drug Reference
Free

Access up-to-date drug prescribing information for healthcare professionals. Quickly search thousands of drug summaries, compare medications, and check for interactions. Identify pills with color photos and imprint codes.

Concise drug summariesDrug comparison toolDrug interaction checker
🏥 Medical
(101)
free
17
PeptIQ: Peptide Tracker
PeptIQ: Peptide Tracker
PeptIQ: Peptide Tracker
GLP-1 dose & vial planner
Free

This app helps users meticulously log peptide injections, manage custom treatment plans, and monitor injection site rotation. It also tracks inventory, provides wellness insights, and offers an educational peptide library, all while prioritizing user privacy with local data storage.

Log peptide injections with dosing and site trackingBuild custom protocols with flexible schedulesMonitor injection site rotation
💪 Health & Fitness
(466)
free with in-app purchases
18
PepCalc: Peptide Calculator
PepCalc: Peptide Calculator
PepCalc: Peptide Calculator
Dose & reconstitution tracker
$9.99
$11.99 | 17% OFF

This app simplifies complex peptide reconstitution calculations for researchers and scientists. It offers instant results for reconstitution ratios, supports multi-peptide blends, and saves custom protocols for efficient lab work. Designed for educational and research settings, it eliminates guesswork in preparing solutions.

Flexible input for amounts, volume, units, and target.Preset and custom unit scales.Multi-peptide blend calculations.
💪 Health & Fitness
(948)
paid
19
Functional Groups
Functional Groups
Functional Groups
Learn organic chemistry
Free

Master organic chemistry functional groups through an engaging and interactive learning experience. Ideal for students in introductory or advanced courses, MCAT prep, and A-Level chemistry, this app covers dozens of essential groups with practice modes and progress tracking.

25+ basic and advanced functional groups300+ organic compoundsMultiple practice modes
📚 Education
(21)
free with in-app purchases
20
EndNote
EndNote
EndNote
by Clarivate Analytics (US) LLC
Free

Manage your research from anywhere with this popular tool. Organize, search, and share academic papers and bibliographies seamlessly across devices. Sync your library and annotate PDFs on the go.

Sync research library across devicesSearch academic databasesAnnotate PDFs
📊 Productivity
(165)
free with in-app purchases

FAQ about Z3E

What are the best z3e apps for iPhone?
Molecules tops our z3e apps ranking as of May 2026, with a 3.6-star average from 166 App Store ratings, and it's free to download.
Yes — 19 of the top z3e apps we rank are free to download, including Molecules and Periodic Table: Chemistry 2026.
Molecules has no ads and has no in-app purchases, according to its App Store listing as of May 2026.
We track 198+ z3e apps on the iOS App Store as of May 2026, ranked by rating, recency, and analysis of real user reviews.
This application allows you to view and interact with three-dimensional renderings of molecules. You can manipulate these structures using touch gestures like rotating, zooming, and panning to explore them from all angles.
You can load custom molecular structures into the app via file sharing or iCloud. These structures can be obtained from public databases like the RCSB Protein Data Bank or NCBI's PubChem.