There are other options, but none of them can match the Qudelix in quality and quantity of features, value for money, and long-term software support.
Seriously. If the Qudelix fits your use case, then just buy it. The competition is miles behind.
Is that still a valid statement?
I just received the HD 560S and love them. But I even like them more with some EQ settings (tested with easyeffects on Arch and EQ Mac on MacOS).
Now I‘d like the same sound with my iPhone/iPad. I only know of the Fiio KA15, KA17 and the Fiio Jade Audio JA 11 that have a PEQ and are portable.
Comparing these, does hint at dis(advantages)?
I gathered so far:
App support: Qudelix is the winner as Fiio has no app.
PEQ: the JA11 had some problems (see the JA11 thread). Don’t know how well the implementation works with the other devices (eq needs to be set via a web interface)
DAC: Qudelix has been measured and seems transparent. Fiio no clue.
Amp: Qudelix is fine for my headphones. Fiio probably as well?!?
Misc: the battery of the Qudelix is nice. The KA17 has a second usb c in. The Fiios have a „desktop mode“ but don’t know whether that would add something valuable.
Design: Fiio KA15 wins for me

Price: where I am, roughly the same (119/129).
I‘d really like to go with a Moondrop Dawn Pro, a Tanchjim Space or a Fosi dongle as they are noch cheaper. But no EQ with iPhone is a show stopper. And I don’t need an external /amp for the MacBook (which measured well, sounds good, loud enough). Rather, with a PEQ equipped dongle I wouldn’t need to pay for soundsource or EQ Mac.
Any tips are much appreciated. Oh and I might know the obvious and easy answer already: buy a Qudelix 5k
Edit: The Neutron HiFi DAC V1 is more expensive (167€ + shipping) and not locally available - so not on the list for me.