Check vision with a swipe-based test that measures distance automatically using face detection. Test each eye individually with an adaptive algorithm. Results indicate visual acuity without requiring additional equipment.
Track electricity, water, and gas consumption or photovoltaic/windpower production. Add meter readings manually or via email. Set reminders for regular readings. Export data for analysis on a home computer. Monitor consumption trends over time.
Calculate tips by setting a percentage and viewing the total amount. bills among multiple people and calculate individual contributions. Save calculation results for future use. No registration required.
