SPLnFFT and its extension SPLnWATCH!

You own SPLnFFT ? You own an Apple Watch ? But take care: if for some reason you did not pay for the App you own, or purchased it at a lower price, then the Complete My Bundle option may/will be more expensive than buying the other App(s) separately See further details here: https://support.apple.com/en-us/HT203054