I have listed the release dates of iOS 8 betas from beta 1 to the latest beta 5 and I think we still have to wait for beta 6 before the Gold Master version is released. Take note that last year's iOS 7 beta testing ended in beta 6 before the release of Golden Master. A week after Golden Master was released, iOS 7.0 was officially released to the public as a free software update from iOS 6.1.6.
- iOS 8 beta 1 – release date: June 2, 2014 9am PDT or June 3, 2014 12:00am PHT
- iOS 8 beta 2 – release date: June 18, 2014 9am PDT or June 19, 2014 12:00am PHT
- iOS 8 beta 3 – release date: July 8,2014 9am PDT or July 9, 2104 12:00am PHT
- iOS 8 beta 4 – release date: July 21,2014 9am PDT or July 22, 2104 12:00am PHT
- iOS 8 beta 5 – release date : August 4, 2014 9am PDT or August 5, 2014 12:00am PHT
IPAD
- iPad Air (Model A1474)
- iPad Air (Model A1475)
- iPad Air (Model A1476)
- iPad mini (Model A1489)
- iPad mini (Model A1490)
- iPad mini (Model A1491)
- iPad (4th generation Model A1458)
- iPad (4th generation Model A1459)
- iPad (4th generation Model A1460)
- iPad mini (Model A1432)
- iPad mini (Model A1454)
- iPad mini (Model A1455)
- iPad Wi-Fi (3rd generation)
- iPad Wi-Fi + Cellular (model for ATT)
- iPad Wi-Fi + Cellular (model for Verizon)
- iPad 2 Wi-Fi (Rev A)
- iPad 2 Wi-Fi
- iPad 2 Wi-Fi + 3G (GSM)
- iPad 2 Wi-Fi + 3G (CDMA)
- iPhone 5s (Model A1453, A1533)
- iPhone 5s (Model A1457, A1518, A1528, A1530)
- iPhone 5c (Model A1456, A1532)
- iPhone 5c (Model A1507, A1516, A1526, A1529)
- iPhone 5 (Model A1428)
- iPhone 5 (Model A1429)
- iPhone 4s
- iPod touch (5th generation)