changzhiai

6 listings we've seen · as of 5 Oct 2026. This is the maker name shown on the store, not proof of who owns the company.

Education

Interactive periodic table with all 118 elements. 3D Bohr models, electron configs, crystal structures, and atomic properties.

Tools

All-in-one 2FA: scan setup QR codes off your screen, import Google Authenticator exports, generate TOTP codes offline.

Travel

Parse Google Maps links to extract waypoints. Export to CSV or KML, preview on OpenStreetMap, and open in the full MapParser app.

Tools

Paste or select a DOI and get a ready-to-copy BibTeX citation. Works via right-click on selected text too.

Travel

Combine multiple Google Maps routes into one link, bypassing the 10-stop limit. Paste your URLs, hit Combine, and copy the result.

Travel

Track visited countries, US states, European countries, Chinese provinces, Indian states, and US national parks from your toolbar.