Promised Increment After 1 Month, It’s Been 3—What Now?

Joined a remote startup in December, same CTC as my last job. Asked for an increment before joining, and the CTO said, “Yeah, let’s do 30 days probation, then we’ll discuss about increment.” Fast forward—it’s been 3 months, and I never followed up (my bad also a little fear as I’m a introvert).

I’ve got 1.4 years in Android, but here I’m handling both Android & iOS (zero iOS experience before, still getting it done). Also, I’m the only dev. I know I deserve that increment.

HR before joining? “Talk to the CTO about this.” So now I’m stuck..do I ask the CTO again or go to the CEO? Don’t wanna be too pushy, but also don’t wanna let this slide. What’s should i do?can u guys help me out please?