Prefix Ladder

Prefix Ladder is an offline learning tool covering 13 decimal SI prefixes from nano to exa. Each entry includes a multiplying factor, simple explanation, unit example, and scale ruler. Search prefixes by name or symbol, change their order, and bookmark entries for later review. Select specific prefixes for practice and mark those you have already learned. Test your knowledge by arranging 12 groups of three prefixes in increasing scale order. Review your answers at the end, track correct sequences, and unlock three milestones as you progress. The app uses prefix names, symbols, and powers verified against the BIPM reference. Focus your study on entries that still need attention. Prefix Ladder works completely offline without registration or cloud sync. Your favorites, notes, and learning progress are stored locally on your device.