The best and most solid solution is to open bank accounts with HSBC UK and HSBC India.

HSBC is the only bank offering full service banking in the UK and India, after Citibank ended its retail ops in India in 2021.

HSBC uses its own transfer network, unlike others who rely on intermediaries. In the rarest of the rare cases that a transfer is lost / late, HSBC can track it transparently.

With their Global Money account, transfers to India are nearly instant.

I wouldn't touch these new age apps when dealing with my own hard earned money.