Mithoon recalls,[3] "It all started when the director Mohit Suri called me up to make the title track for the film Aashiqui 2.

"Tum Hi Ho" and "Sunn Raha Hai" (both versions) are our favourites, but "Chahun Main Ya Naa" and "Piya Aaye Na" end up as a close second.

"[5] Planet Bollywood commented "The song has all the hallmarks of a Mithoon creation; it's soulful, extremely touching and of course it's dripping with melody.

The piano, strings, and beats are very effective in creating an eerie romantic atmosphere for the singer to transform the song and Arijit Singh does that magnificently.

"[6] Koimoi commented, "Album opens with a heavy and deep voice of Arijit Singh crooning "Tum Hi Ho".

Composer Mithoon has penned the lyrics for this passionate ballad which might remind one of the rest of the Bhatt music that has been heard in abundance in recent times, right from Raaz 3 to Jism 2.

"[7] Planet Bollywood comments, "There’s a reprise version of this song later in the album called “Meri Aashiqui” where Arijit is joined by Palak Muchal who sounds incredibly like Shreya Ghoshal which is high praise indeed.

Arijit Singh reprises his vocals for both songs in Telugu, with Arpita Chakraborty replacing Palak Muchhal for the duet version.

Shreya Ghoshal and Armaan Malik performed the mixtape version of this song on T-Series Mixtape as "Tum Hi Ho/Rehnuma", a medley of "Tum Hi Ho" and "Rehnuma" from the film Rocky Handsome, which was also sung by Shreya Ghoshal along with Inder Bawra and composed by Sunny and Inder Bawra.

[31][32] In December 2018, American rapper T-Pain was accused of plagiarizing the composition on his single called "That's Yo Money".