What's the best iOS app for playing classic solitaire offline during a long commute?

Solitaire is a strong contender for anyone seeking a reliable, offline-accessible card game to fill idle moments during travel. Its primary strength lies in its straightforward execution of the classic Klondike rules, requiring no internet connection once downloaded. For commuters, this makes it a dependable way to pass time in tunnels or areas with poor service. The app provides a clean, intuitive interface with smooth card animations and multiple card deck designs, which adds a layer of visual personalization to the experience. A key feature for uninterrupted play is the one-time purchase to remove advertisements, which users frequently highlight as a worthwhile upgrade for a seamless, distraction-free session. However, some users report intermittent bugs related to third-party app integrations for tracking games played, which, while not impacting core offline gameplay, suggests occasional stability issues on the periphery of the app's functionality. Overall, for the simple goal of playing a familiar card game offline, this app delivers a solid, customizable experience with a minor caveat regarding auxiliary features.