The album's production was handled by members of The Invasion, Tha Bizness, Jake One, Trackademicks and Chase N. Cashe, among others.
collaborated with various artists on the album including 2 Chainz, Wiz Khalifa, Too Short, E-40, Berner, Dizzy Wright, along with HBK Gang members Sage the Gemini, P-Lo, Kool John, Skipper and Dave Steezy.
elaborated about the album to hip hop magazine XXL, revealing the title and the projected release date of April 2014.
revealed Wiz Khalifa, 2 Chainz, the entire HBK Gang, E-40, Too Short, Chase N. Cashe, Jake One and Tha Bizness would be contributing to the album.
[7] The final version of the album featured guest appearances from 2 Chainz, Wiz Khalifa, Too Short, E-40, Berner, Dizzy Wright along with HBK Gang members Sage the Gemini, Kool John and Skipper.
"[7] The Invasion, Tha Bizness, Jake One, Trackademicks and Chase N. Cashe contributed production to the final version of the album.
[13] Then in mid-February 2014, HBK Gang released their Heartbreak Camo Pack clothing line in San Francisco, California.
The three song EP featured guest appearances from rappers Dizzy Wright and Sage The Gemini.
[18] After seemingly abandoning the April release period due to sample clearance issues, on March 26, 2014 Iamsu!
[24] The final version featured fellow rappers 2 Chainz and the previously announced appearance by Sage the Gemini.
[27] Within the next month, the music video was filmed with 2 Chainz, Sage and the rest of the HBK Gang in Richmond, California.
[33] Rachel Chesbrough of XXL stated that "Sincerely Yours is a highly listenable sampling of throwback Bay undertones, overlaid with a more modern sound and structure.
He proves easy to listen to both as a capable MC with some shining moments, and as a young producer who remains loyal to his city.
"[38] Brandon Soderberg of Spin said, "the moments where his lofty sonic ambition is answered with compelling content suggests the potential for a truly singular plateau jump.
"[37] Fred Thomas of AllMusic stated that, "Falling somewhere between the mainstream rap-pop beats of Top 40 rappers like Drake and the hyphy influence of Iamsu's California roots, the album wanders between happy-go-lucky rap ballads like "Girls" and more club-friendly tracks and even the jazzy hybrid beat of "Ascension".
"[39] Christopher R. Weingarten of Rolling Stone said, "Outside of its strong singles ("Only That Real" and "What You 'Bout"), Sincerely fades into rap's existing trends instead of bucking them.
adventurously explores the Bay Area's established terrain with Sincerely Yours, but it doesn't punch with the ferocity of past work."
"[40] The album debuted at number 50 on the Billboard 200 chart, with first-week sales of 5,832 copies in the United States.