ChemSearch
New Features
• Spectral data: Now shown spectral data (NMR, IR, mass, UV and Raman) for compounds
• Expanded chemical database
• Substances: 575 → 1532
• Ions: 108 → 211
• Functional groups: 71 → 122
• Reactions: 149 → 326
Changes
• Cards mode off by default (re-enable it in Settings)
Full changelog: https://github.com/FurtherSecrets24680/chemsearch-android/releases/tag/1.16.0
SEARCH
Search PubChem by name, CAS number, formula, CID, or structure. Includes autosuggestions, spelling matches, caching, and specific error diagnostics.
Advanced Search filters by elements (included/excluded), molecular weight, charge, 3D data, GHS hazards, and name text. Result pages provide identifiers, structures, safety data, synonyms, and summaries with tap-to-copy actions. Expanding a result also reveals the compound's published spectra (NMR, IR, mass, UV, and Raman) grouped by technique.
STRUCTURE & ISOMER SEARCH
• Structure Search: Draw molecules with atoms, bonds, charges, and templates. Search PubChem for exact, substructure, superstructure, or similarity matches. Import/export SMILES, InChI, and MOL files.
• Isomer Search: Search compounds by molecular formula. View molar mass, atom counts, and degrees of unsaturation. Sort by relevance or name.
PERIODIC TABLE
Browse all 118 elements with category filters, shell diagrams, physical properties, and spectra. Interactive heatmaps display trends for electronegativity, atomic radius, ionization energy, density, melting point, and boiling point (in K, °C, or °F) with top-five rankings.
CHEMICAL DATABASE
Offline database with 1500+ substances, 200+ ions, 10+ functional groups, and 300+ reactions. Covers acids, salts, oxides, ores, polymers, amino acids, vitamins, alkaloids, drugs, esters, organometallics, and silicates. Search by name, alias, or formula.
CHEMISTRY TOOLS
Includes 15 tools for calculations and reference:
• Molar Mass Calculator
• Empirical Formula Finder
• Oxidation State Finder
• pH / pOH Calculator
• Reaction Balancer
• Precipitate Predictor
• Reaction Predictor
• Limiting Reagent
• Percent Yield
• Reaction Scaling
• Dilution Calculator
• Ideal Gas Law
• SMILES Visualizer
• 3D Molecule Viewer
• Compare Compounds
Stoichiometry tools calculate reagent consumption, leftovers, and atom economy.
LIBRARY & RECENT SEARCHES
Save compounds as Favorites or Downloads (Basic, Structures, or Complete) for offline use. Long-press to copy formulas, open in PubChem, or delete. Export and backup library data via CSV or JSON. Search history supports pinning, sorting, and grouping.
HOME SCREEN & WIDGETS
• Compound of the Day: Daily compound card with formula and typical uses.
• Widgets: Compound of the Day and Random Compound (with refresh button).
• Shortcuts: App-launcher shortcuts to Search, Library, Tools, and Settings.
• Explore: Quick access to Structure Search, Isomer Search, Periodic Table, and Database.
DISPLAY & OPTIONAL AI
• Themes: Light, Dark, AMOLED true-black, 5 color accents, and card or flat layouts.
• Optional AI: Fetch compound summaries via Google Gemini, Groq, OpenAI, OpenRouter, or Mistral AI using your own API key.
• Preferences: Configurable temperature units (K, °C, °F), haptics, and cache controls.
LOCALIZATION
Available in 16 languages: English, Bengali, Danish, German, Greek, Spanish, Finnish, French, Italian, Japanese, Dutch, Norwegian, Polish, Portuguese, Russian, and Swedish.
DATA, PRIVACY & LICENSE
• Free and open source under the MIT License.
• No account, analytics, tracking, or app backend. Data stays on your device.
• Network access is only used for external queries (PubChem, Wikipedia, or configured AI).
• For study and reference only; consult official SDS for laboratory work.
Anti-Features
This app has features you may not like. Learn more!
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This app promotes or depends entirely on a non-free network service
Connects to PubChem (pubchem.ncbi.nlm.nih.gov) for getting most of the compound data, and optional AI providers for compound description.
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This app depends entirely on a certain instance of a network service
Connects to Wikipedia for compound descriptions.
- Author: FurtherSecrets24680
- License: MIT License
- Issue Tracker
- Source Code
- Changelog
- Build Metadata
- Reproducibility Status
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Versions
Although APK downloads are available below to give you the choice, you should be aware that by installing that way you will not receive update notifications and it's a less secure way to download. We recommend that you install the F-Droid client and use that.
Download F-Droid-
arm64-v8aarmeabi-v7ax86x86_64This version requires Android 8.0 or newer.
It is built and signed by F-Droid, and guaranteed to correspond to this source tarball.
Download APK 5.9 MiB PGP Signature | Build Log
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arm64-v8aarmeabi-v7ax86x86_64This version requires Android 8.0 or newer.
It is built and signed by F-Droid, and guaranteed to correspond to this source tarball.
Download APK 5.8 MiB PGP Signature | Build Log
-
arm64-v8aarmeabi-v7ax86x86_64This version requires Android 8.0 or newer.
It is built and signed by F-Droid, and guaranteed to correspond to this source tarball.
Download APK 5.8 MiB PGP Signature | Build Log
Highlights from v1.15.0:
• Offline Reaction Predictor
• Compound of the Day & home-screen widgets
• Expanded database with 575 substances
• Bengali localization and launcher shortcuts
• CSV library export
• Improved Search, Periodic Table heatmaps and Stoichiometry
Full v1.15.0 release notes: https://github.com/FurtherSecrets24680/chemsearch-android/releases/tag/1.15.0
• Home-screen widgets & launcher shortcuts
• Chemical database expanded to 575 substances
• Library CSV export and quick long-press actions
• Added new language: Bengali
• Enhanced Search, Periodic Table heatmaps & Stoichiometry
Full changelog: https://github.com/FurtherSecrets24680/chemsearch-android/releases/tag/1.15.0