Speed is the feature
If logging takes more than a minute, you will not do it on the walk back to Temple. Radar is built around artist, venue, date — Find fills those from UK listings.
iOS-only ticket scanners are useful if that is your bottleneck. They are not a diary if they cannot hold 2019.
Past and upcoming in one timeline
The best iPhone concert app is the one that still has last year’s Academy show next to next month’s arena date. Split apps are how history dies.
Setlists, ratings, and crew tags sit on the gig. That is the Letterboxd-shaped product, not a countdown widget.
Radar on iPhone
Download Radar from the App Store, log ten gigs free, and keep Android friends in the same network. The diary is the product; Find is how UK nights get in quickly.
If you also want festival clash tools, that is Pro — optional, not the reason to log Tuesday’s support bill.