What’s new
- Improved build system compatibility and stability.
- Technical updates: Upgraded internal build tools to Gradle 9.6.0.
- General maintenance and project cleanup.
Quick answer
Search compounds, structures, reference and use practical chemistry tools.
F-Droid repository metadata
ChemSearch is a quick and simple chemistry reference app for Android.
Search compounds by name, CAS number, formula, PubChem CID, or drawn structure. Open formulas, identifiers, 2D structures, 3D models, descriptions, synonyms, and GHS safety summaries when source data is available.
The app also includes a periodic table, a built-in chemical database, offline compound saves, recent searches, favorites, compound comparison, and practical chemistry tools such as molar mass, empirical formula, pH/pOH, oxidation state, reaction balancing, precipitation, stoichiometry, dilution, gas laws, SMILES lookup, and a local 3D molecule viewer.
Most chemistry data comes from public sources such as PubChem, Wikipedia, Wikimedia Commons, UNECE GHS pictograms, Bowserinator/Periodic-Table-JSON on Github, and the NCI/CADD resolver.
AI descriptions are optional and require the user to add their own API key for the chosen provider.
Safety information is for quick reference only. Always follow the official SDS, lab rules, and local safety requirements for real handling decisions.
Screenshots
How to install
- Download the APK from the button at the top of this page.
- Allow “Install unknown apps” for your browser or file manager only, not for every app.
- Open the downloaded file and confirm the installation.
- If installation fails with “App not installed,” remove an earlier build of the same app first. A signature conflict is the usual cause.
Data safety
- Every file is checked against its published SHA-256 before it is listed.
- Files are scanned for malware on every update.
- The permissions each app requests are listed on its own page.
- Read the full safety policy for how we test, flag, and delist files.
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