Tim's pedals sound very state of the art!
At the other end of the sophistication scale I recently got a Fame Looper mini-pedal - for £33 I thought it would be worth a go even if it ended up being crap - which it isn't.
Has 10 mins capacity, USB port to import/export and dead easy to use. Only downside is as a mini-pedal you need a 9v supply as no internal battery.
I use it mainly as a learning aid - to drone a root note and then practise intervals, arpeggios and different scale & chord variations over it. I'm very new to music theory and educating my ears to hear the notes properly is actually proving harder than getting my fingers to do the right thing.
https://www.musicstore.de/en_GB/GBP/Fame-Looper/art-GIT0036602-000
