In short
6144 equalizer by DDMF is an app for iOS created by Christian Siedschlag. And this is a perfect way to create warmth.
Highlights
I use it it AUM to create warmth and dynamic touches to tracks
Absolutely the best mastering eq I've ever used
Description
The 6144 is an Audio Unit equalizer which aims to recreate the legendary sound of the Neve hardware EQs. It will add that extra shimmer to your sound already when being added to a track flat, without turning any knobs, due to its carefully designed higher harmonic generation algorithm. Now start turning the knobs on any of the five bands and you'll be amazed: it's really possible to add copious amounts of gain without ever sounding harsh, at all. The 6144 has been a not-so-secret weapon for audio engineers in the desktop realm for some years already, and is now finally available as an iOS plugin for use in an Audio Units compatible host.
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