Spark is a minimalistic wallet GUI for c-lightning, accessible over the web or through mobile and desktop apps (for Android, Linux, macOS and Windows). It is currently oriented for technically advanced users and is not an all-in-one package, but rather a "remote control" interface for a c-lightning node that has to be managed separately.
Sparks supports sending and receiving payments, viewing history, and managing channels.
Spark is a purely off-chain wallet, with no on-chain payments. This allows Spark to fully realize the awesome UX enabled by lightning, without worrying about the complications and friction of on-chain. This might change someday.
Spark has a responsive UI suitable for mobile, tablet and desktop devices, but is best optimized for use on mobile.
