The phrase "iterative upgrade" means making continuous improvements or enhancements to something by repeating a process or making small changes over time. Full definition
By most accounts, the new additions to the Galaxy S family will be iterative upgrades over their predecessors and focus on refining the widely popular Galaxy S8 formula instead of radically changing it. (androidheadlines.com)
«Pro is mostly a marketing gimmick,» he said, when asked about the question of a PS5 rather than further iterative upgrades from Sony. (video-games-galore.com)
The iPhone 8 should make its debut this fall, along with iterative upgrades of the current iPhones. (techtimes.com)