Web
Access by link, zero installs, instant feedback.
Web apps don't wait for store review: follow a link and the tester is inside. But such a tester disappears as fast as they arrived.
A campaign locks in the commitments: two weeks of usage, screenshots, a review. The fastest feedback loop for PWAs, SaaS and landing pages.
[✓]instant access by link
[✓]no stores, no review
[✓]the fastest feedback loop
[✓]fits PWAs and SaaS