Answer : 1. "'Sakhi'"
Explanation :

Vikram Sarabhai Space Center (VSSC) located at Thumba, Thiruvananthapuram has launched a multi-purpose app 'Sakhi' (Space-borne Assistant and Knowledge Hub for Crew Interaction-SAKHI) to assist the Gaganyaan crew. This app will help in monitoring the health of astronauts and maintaining communication with ISRO on Earth. ISRO can launch Gaganyaan human mission in the year 2025.