Can I install Slugline on multiple devices?

Yes! Please do.

Slugline 2 for macOS is a different application than Slugline for iOS/iPadOS. On each platform, you are welcome to install on multiple devices that use the same Apple ID for App Store purchases.

macOS

You can install Slugline for macOS on multiple Macs, as long as they are running OS X 10.11 or later, and you are logged in to the same Apple ID you used to purchase the app. If you have already purchased Slugline 2 on another Mac using the same Apple ID, click the Upgrade button and choose Restore Purchase.

iOS/iPadOS

You can install Slugline for iOS/iPadOS on multiple iPads and/or iPhones, as long as they are logged in to the same Apple ID used to purchase.

But it’s not working.

On both iOS/iPadOS, occasionally the App Store shows you a Buy button instead of a Download button for app you’ve already purchased. But the App Store will never double-charge you for the same app, so it’s okay to press Buy. The App Store will realize that you already own Slugline and display an alert explaining that you won’t be charged.