Support
Frequently Asked Questions
How do I search for an element?
Tap the search icon in the navigation bar. You can search by element name, symbol, or atomic number. Use filters to narrow results by category, period, group, or block.
How do I save favorite elements?
On any element detail page, tap the star icon to add it to your favorites. You can also add personal notes to each favorite element.
What are the different electronegativity scales?
The app displays 11 different electronegativity scales including Pauling, Sanderson, Allen, Mulliken, and more. Each scale uses different calculation methods and is useful for different applications in chemistry.
Does the app require an internet connection?
No! All element data is bundled with the app and works completely offline. Perfect for use in classrooms, laboratories, or anywhere without internet access.
What data sources does the app use?
All data is sourced from authoritative references including NIST, IUPAC, and peer-reviewed scientific literature. The app uses the same comprehensive database that powers the mendeleev Python library, trusted by researchers worldwide.
How do I zoom and pan the periodic table?
Use standard pinch gestures to zoom in and out. Swipe to pan across the table. Double-tap to reset the zoom level.
How do I enable dark mode?
The app automatically follows your system's dark mode setting. Change your device's appearance in Settings > Display & Brightness.
System Requirements
- • iOS 17.4 or later
- • Compatible with iPhone and iPad
- • Approximately 50 MB storage space
Version Information
Current version: 1.0
Last updated: January 2026