Deckloud is an independent client for Nextcloud Deck, bringing boards, cards, comments, attachments, search, and an offline queue to iPhone, iPad, Android, Mac, Windows, and Linux. The free tier has no time limit, and Pro lifts the monthly ceilings.

Free without a clock: boards, cards, comments, attachments, search, sync, the offline queue, Today, and the Gantt timeline are all in the free app.
Pro removes the limits: Quick Capture and Focus sessions without a monthly cap, up to 100 repeating cards, Smart Capture of 20 cards at once from a paste, a photo, or dictation, and the full team view with a weekly report.
Two ways to buy: Pro lifetime is $39 on the App Store and Google Play, or $19 for the desktop-only licence on Mac, Windows, and Linux; subscriptions run $29 a year or $9 a month.

A Pro purchase covers every Deckloud app that follows, including Calendar and Mail, and it is a one-time unlock with future updates rather than a subscription.