| IOS 13 | Apple Inc. | 2019 | proprietary license |
| IOS 14 | Apple Inc. | 2020 | — |
| IOS 15 | Apple Inc. | — | — |
| IOS 16 | Apple Inc. | 2022 | — |
| IOS 17 | Apple Inc. | 2023 | — |
| IOS 18 | Apple Inc. | 2024 | — |
| IOS 27 | Apple Inc. | — | — |
| IOS 4 | Apple Inc. | 2010 | Apple Public Source License |
| IOS 5 | Apple Inc. | — | Apple Public Source License |
| IOS 6 | Apple Inc. | 2012 | Apple Public Source License |
| IOS 7 | Apple Inc. | 2013 | Apple Public Source License |
| IPhone OS 1 | Apple Inc. | 2007 | proprietary license |
| IPhone OS 2 | Apple Inc. | 2008 | Apple Public Source License |
| IPhone OS 3 | Apple Inc. | 2009 | Apple Public Source License |